mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
719 lines
22 KiB
PHP
719 lines
22 KiB
PHP
<?php
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/**
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* Supports debugging and core error handling.
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*
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* Attaches custom methods to the default error handling hooks
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* in PHP. Currently, two levels of error are supported:
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*
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* - Notice
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* - Warning
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* - Error
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*
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* Uncaught exceptions are currently passed to the debug
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* reporter as standard PHP errors.
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*
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* Errors handled by this class are passed along to {@link SS_Log}.
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* For configuration information, see the {@link SS_Log}
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* class documentation.
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*
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* @todo add support for user defined config: Debug::die_on_notice(true | false)
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* @todo better way of figuring out the error context to display in highlighted source
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*
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* @package framework
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* @subpackage dev
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*/
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class Debug {
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/**
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* @var $custom_smtp_server string Custom mailserver for sending mails.
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*/
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protected static $custom_smtp_server = '';
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/**
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* @var $send_errors_to string Email address to send error notifications
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*/
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protected static $send_errors_to;
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/**
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* @var $send_warnings_to string Email address to send warning notifications
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*/
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protected static $send_warnings_to;
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/**
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* String indicating the file where errors are logged.
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* Filename is relative to the site root.
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* The named file will have a terse log sent to it, and the full log (an
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* encoded file containing backtraces and things) will go to a file of a similar
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* name, but with the suffix ".full" added.
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*/
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protected static $log_errors_to = null;
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/**
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* The header of the message shown to users on the live site when a fatal error occurs.
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*/
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public static $friendly_error_header = 'There has been an error';
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/**
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* The body of the message shown to users on the live site when a fatal error occurs.
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*/
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public static $friendly_error_detail = 'The website server has not been able to respond to your request.';
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/**
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* Show the contents of val in a debug-friendly way.
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* Debug::show() is intended to be equivalent to dprintr()
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*/
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public static function show($val, $showHeader = true) {
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if(!Director::isLive()) {
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if($showHeader) {
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$caller = Debug::caller();
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if(Director::is_ajax() || Director::is_cli())
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echo "Debug ($caller[class]$caller[type]$caller[function]() in " . basename($caller['file'])
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. ":$caller[line])\n";
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else
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echo "<div style=\"background-color: white; text-align: left;\">\n<hr>\n"
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. "<h3>Debug <span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]()"
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. " \nin " . basename($caller['file']) . ":$caller[line])</span>\n</h3>\n";
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}
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echo Debug::text($val);
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if(!Director::is_ajax() && !Director::is_cli()) echo "</div>";
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else echo "\n\n";
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}
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}
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/**
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* Close out the show dumper
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*
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* @param mixed $val
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*/
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public static function endshow($val) {
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if(!Director::isLive()) {
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$caller = Debug::caller();
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echo "<hr>\n<h3>Debug \n<span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]()"
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. " \nin " . basename($caller['file']) . ":$caller[line])</span>\n</h3>\n";
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echo Debug::text($val);
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die();
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}
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}
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/**
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* Quick dump of a variable.
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*
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* @param mixed $val
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*/
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public static function dump($val) {
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echo '<pre style="background-color:#ccc;padding:5px;font-size:14px;line-height:18px;">';
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$caller = Debug::caller();
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echo "<span style=\"font-size: 12px;color:#666;\">" . basename($caller['file']) . ":$caller[line] - </span>\n";
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if (is_string($val)) print_r(wordwrap($val, 100));
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else print_r($val);
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echo '</pre>';
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}
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/**
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* ??
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*
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* @param unknown_type $val
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* @return unknown
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*/
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public static function text($val) {
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if(is_object($val)) {
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if(method_exists($val, 'hasMethod')) {
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$hasDebugMethod = $val->hasMethod('debug');
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} else {
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$hasDebugMethod = method_exists($val, 'debug');
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}
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if($hasDebugMethod) {
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return $val->debug();
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}
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}
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if(is_array($val)) {
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$result = "<ul>\n";
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foreach($val as $k => $v) {
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$result .= "<li>$k = " . Debug::text($v) . "</li>\n";
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}
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$val = $result . "</ul>\n";
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} else if (is_object($val)) {
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$val = var_export($val, true);
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} else if (is_bool($val)) {
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$val = $val ? 'true' : 'false';
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$val = '(bool) ' . $val;
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} else {
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if(!Director::is_cli() && !Director::is_ajax()) {
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$val = "<pre style=\"font-family: Courier new\">" . htmlentities($val, ENT_COMPAT, 'UTF-8')
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. "</pre>\n";
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}
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}
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return $val;
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}
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/**
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* Show a debugging message
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*/
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public static function message($message, $showHeader = true) {
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if(!Director::isLive()) {
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$caller = Debug::caller();
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$file = basename($caller['file']);
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if(Director::is_cli()) {
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if($showHeader) echo "Debug (line $caller[line] of $file):\n ";
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echo $message . "\n";
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} else {
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echo "<p class=\"message warning\">\n";
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if($showHeader) echo "<b>Debug (line $caller[line] of $file):</b>\n ";
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echo Convert::raw2xml($message) . "</p>\n";
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}
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}
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}
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// Keep track of how many headers have been sent
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static $headerCount = 0;
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/**
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* Send a debug message in an HTTP header. Only works if you are
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* on Dev, and headers have not yet been sent.
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*
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* @param string $msg
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* @param string $prefix (optional)
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* @return void
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*/
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public static function header($msg, $prefix = null) {
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if (Director::isDev() && !headers_sent()) {
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self::$headerCount++;
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header('SS-'.self::$headerCount.($prefix?'-'.$prefix:'').': '.$msg);
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}
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}
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/**
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* Log to a standard text file output.
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*
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* @param $message string to output
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*/
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public static function log($message) {
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$file = dirname(__FILE__).'/../../debug.log';
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$now = date('r');
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$oldcontent = (file_exists($file)) ? file_get_contents($file) : '';
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$content = $oldcontent . "\n\n== $now ==\n$message\n";
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file_put_contents($file, $content);
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}
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/**
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* Load error handlers into environment.
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* Caution: The error levels default to E_ALL is the site is in dev-mode (set in main.php).
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*/
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public static function loadErrorHandlers() {
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set_error_handler('errorHandler', error_reporting());
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set_exception_handler('exceptionHandler');
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}
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public static function noticeHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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if(error_reporting() == 0) return;
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// Send out the error details to the logger for writing
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SS_Log::log(
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array(
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'errno' => $errno,
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'errstr' => $errstr,
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'errfile' => $errfile,
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'errline' => $errline,
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'errcontext' => $errcontext
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),
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SS_Log::NOTICE
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);
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if(Director::isDev()) {
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self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Notice");
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}
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}
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/**
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* Handle a non-fatal warning error thrown by PHP interpreter.
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*
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* @param unknown_type $errno
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* @param unknown_type $errstr
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* @param unknown_type $errfile
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* @param unknown_type $errline
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* @param unknown_type $errcontext
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*/
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public static function warningHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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if(error_reporting() == 0) return;
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if(self::$send_warnings_to) {
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self::emailError(self::$send_warnings_to, $errno, $errstr, $errfile, $errline, $errcontext, "Warning");
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}
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// Send out the error details to the logger for writing
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SS_Log::log(
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array(
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'errno' => $errno,
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'errstr' => $errstr,
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'errfile' => $errfile,
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'errline' => $errline,
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'errcontext' => $errcontext
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),
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SS_Log::WARN
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);
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if(self::$log_errors_to) {
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self::log_error_if_necessary( $errno, $errstr, $errfile, $errline, $errcontext, "Warning");
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}
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if(Director::isDev()) {
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self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Warning");
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}
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}
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/**
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* Handle a fatal error, depending on the mode of the site (ie: Dev, Test, or Live).
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*
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* Runtime execution dies immediately once the error is generated.
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*
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* @param unknown_type $errno
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* @param unknown_type $errstr
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* @param unknown_type $errfile
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* @param unknown_type $errline
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* @param unknown_type $errcontext
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*/
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public static function fatalHandler($errno, $errstr, $errfile, $errline, $errcontext) {
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if(self::$send_errors_to) {
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self::emailError(self::$send_errors_to, $errno, $errstr, $errfile, $errline, $errcontext, "Error");
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}
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// Send out the error details to the logger for writing
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SS_Log::log(
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array(
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'errno' => $errno,
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'errstr' => $errstr,
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'errfile' => $errfile,
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'errline' => $errline,
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'errcontext' => $errcontext
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),
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SS_Log::ERR
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);
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if(self::$log_errors_to) {
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self::log_error_if_necessary( $errno, $errstr, $errfile, $errline, $errcontext, "Error");
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}
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if(Director::isDev() || Director::is_cli()) {
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self::showError($errno, $errstr, $errfile, $errline, $errcontext, "Error");
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} else {
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self::friendlyError();
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}
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exit(1);
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}
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/**
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* Render a user-facing error page, using the default HTML error template
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* rendered by {@link ErrorPage} if it exists. Doesn't use the standard {@link SS_HTTPResponse} class
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* the keep dependencies minimal.
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*
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* @uses ErrorPage
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*
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* @param int $statusCode HTTP Status Code (Default: 500)
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* @param string $friendlyErrorMessage User-focused error message. Should not contain code pointers
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* or "tech-speak". Used in the HTTP Header and ajax responses.
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* @param string $friendlyErrorDetail Detailed user-focused message. Is just used if no {@link ErrorPage} is found
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* for this specific status code.
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* @return string HTML error message for non-ajax requests, plaintext for ajax-request.
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*/
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public static function friendlyError($statusCode=500, $friendlyErrorMessage=null, $friendlyErrorDetail=null) {
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if(!$friendlyErrorMessage) $friendlyErrorMessage = self::$friendly_error_header;
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if(!$friendlyErrorDetail) $friendlyErrorDetail = self::$friendly_error_detail;
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if(!headers_sent()) {
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$currController = Controller::curr();
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// Ensure the error message complies with the HTTP 1.1 spec
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$msg = strip_tags(str_replace(array("\n", "\r"), '', $friendlyErrorMessage));
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if($currController) {
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$response = $currController->getResponse();
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$response->setStatusCode($statusCode, $msg);
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} else {
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header($_SERVER['SERVER_PROTOCOL'] . " $statusCode $msg");
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}
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}
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if(Director::is_ajax()) {
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echo $friendlyErrorMessage;
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} else {
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if(class_exists('ErrorPage')){
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$errorFilePath = ErrorPage::get_filepath_for_errorcode(
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$statusCode,
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class_exists('Translatable') ? Translatable::get_current_locale() : null
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);
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if(file_exists($errorFilePath)) {
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$content = file_get_contents(ASSETS_PATH . "/error-$statusCode.html");
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// $BaseURL is left dynamic in error-###.html, so that multi-domain sites don't get broken
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echo str_replace('$BaseURL', Director::absoluteBaseURL(), $content);
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}
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} else {
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$renderer = new DebugView();
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$renderer->writeHeader();
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$renderer->writeInfo("Website Error", $friendlyErrorMessage, $friendlyErrorDetail);
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if(Email::getAdminEmail()) {
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$mailto = Email::obfuscate(Email::getAdminEmail());
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$renderer->writeParagraph('Contact an administrator: ' . $mailto . '');
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}
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$renderer->writeFooter();
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}
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}
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}
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/**
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* Create an instance of an appropriate DebugView object.
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*/
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public static function create_debug_view() {
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if(Director::is_cli() || Director::is_ajax()) return new CliDebugView();
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else return new DebugView();
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}
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/**
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* Render a developer facing error page, showing the stack trace and details
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* of the code where the error occured.
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*
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* @param unknown_type $errno
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* @param unknown_type $errstr
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* @param unknown_type $errfile
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* @param unknown_type $errline
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* @param unknown_type $errcontext
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*/
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public static function showError($errno, $errstr, $errfile, $errline, $errcontext, $errtype) {
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if(!headers_sent()) {
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$errText = "$errtype at line $errline of $errfile";
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$errText = str_replace(array("\n","\r")," ",$errText);
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if(!headers_sent()) header($_SERVER['SERVER_PROTOCOL'] . " 500 $errText");
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// if error is displayed through ajax with CliDebugView, use plaintext output
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if(Director::is_ajax()) {
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header('Content-Type: text/plain');
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}
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}
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// Legacy error handling for customized prototype.js Ajax.Base.responseIsSuccess()
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// if(Director::is_ajax()) echo "ERROR:\n";
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$reporter = self::create_debug_view();
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// Coupling alert: This relies on knowledge of how the director gets its URL, it could be improved.
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$httpRequest = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : @$_REQUEST['url'];
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if(isset($_SERVER['REQUEST_METHOD'])) $httpRequest = $_SERVER['REQUEST_METHOD'] . ' ' . $httpRequest;
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$reporter->writeHeader($httpRequest);
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$reporter->writeError($httpRequest, $errno, $errstr, $errfile, $errline, $errcontext);
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if(file_exists($errfile)) {
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$lines = file($errfile);
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// Make the array 1-based
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array_unshift($lines,"");
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unset($lines[0]);
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$offset = $errline-10;
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$lines = array_slice($lines, $offset, 16, true);
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$reporter->writeSourceFragment($lines, $errline);
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}
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$reporter->writeTrace(($errcontext ? $errcontext : debug_backtrace()));
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$reporter->writeFooter();
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}
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/**
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* Utility method to render a snippet of PHP source code, from selected file
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* and highlighting the given line number.
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*
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* @param string $errfile
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* @param int $errline
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*/
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public static function showLines($errfile, $errline) {
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$lines = file($errfile);
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$offset = $errline-10;
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$lines = array_slice($lines, $offset, 16);
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echo '<pre>';
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$offset++;
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foreach($lines as $line) {
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$line = htmlentities($line, ENT_COMPAT, 'UTF-8');
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if ($offset == $errline) {
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echo "<span>$offset</span> <span class=\"error\">$line</span>";
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} else {
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echo "<span>$offset</span> $line";
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}
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$offset++;
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}
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echo '</pre>';
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}
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/**
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* Dispatch an email notification message when an error is triggered.
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* @deprecated 2.5
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* To create error logs by email, use this code instead:
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* <code>
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* $emailWriter = new SS_LogEmailWriter('my@email.com');
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* SS_Log::add_writer($emailWriter, SS_Log::ERR);
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* </code>
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*
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* @param string $emailAddress
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* @param string $errno
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* @param string $errstr
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* @param string $errfile
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* @param int $errline
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* @param string $errcontext
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* @param string $errorType "warning" or "error"
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* @return boolean
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*/
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public static function emailError($emailAddress, $errno, $errstr, $errfile, $errline, $errcontext,
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$errorType = "Error") {
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Deprecation::notice('2.5',
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'Use SS_Log instead. See the class documentation in SS_Log.php for more information.');
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$priority = ($errorType == 'Error') ? SS_Log::ERR : SS_Log::WARN;
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$writer = new SS_LogEmailWriter($emailAddress);
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SS_Log::add_writer($writer, $priority);
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SS_Log::log(
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array(
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'errno' => $errno,
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'errstr' => $errstr,
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'errfile' => $errfile,
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'errline' => $errline,
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'errcontext' => $errcontext
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),
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$priority
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);
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SS_Log::remove_writer($writer);
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}
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|
|
/**
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|
* Log the given error, if self::$log_errors is set.
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|
* Uses the native error_log() funtion in PHP.
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|
*
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* Format: [d-M-Y h:i:s] <type> at <file> line <line>: <errormessage> <url>
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*
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* @todo Detect script path for CLI errors
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* @todo Log detailed errors to full file
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* @deprecated 2.5 See SS_Log on setting up error file logging
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*/
|
|
protected static function log_error_if_necessary($errno, $errstr, $errfile, $errline, $errcontext, $errtype) {
|
|
Deprecation::notice('2.5',
|
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'Use SS_Log instead. See the class documentation in SS_Log.php for more information.');
|
|
$priority = ($errtype == 'Error') ? SS_Log::ERR : SS_Log::WARN;
|
|
$writer = new SS_LogFileWriter('../' . self::$log_errors_to);
|
|
SS_Log::add_writer($writer, $priority);
|
|
SS_Log::log(
|
|
array(
|
|
'errno' => $errno,
|
|
'errstr' => $errstr,
|
|
'errfile' => $errfile,
|
|
'errline' => $errline,
|
|
'errcontext' => $errcontext
|
|
),
|
|
$priority
|
|
);
|
|
SS_Log::remove_writer($writer);
|
|
}
|
|
|
|
/**
|
|
* @param string $server IP-Address or domain
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*/
|
|
public static function set_custom_smtp_server($server) {
|
|
self::$custom_smtp_server = $server;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*/
|
|
public static function get_custom_smtp_server() {
|
|
return self::$custom_smtp_server;
|
|
}
|
|
|
|
/**
|
|
* Send errors to the given email address.
|
|
* Can be used like so:
|
|
* if(Director::isLive()) Debug::send_errors_to("sam@silverstripe.com");
|
|
*
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*
|
|
* @param string $emailAddress The email address to send errors to
|
|
* @param string $sendWarnings Set to true to send warnings as well as errors (Default: false)
|
|
*/
|
|
public static function send_errors_to($emailAddress, $sendWarnings = false) {
|
|
Deprecation::notice('2.5', 'Use SS_Log instead. See SS_Log on setting up error email notification.');
|
|
self::$send_errors_to = $emailAddress;
|
|
self::$send_warnings_to = $sendWarnings ? $emailAddress : null;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*/
|
|
public static function get_send_errors_to() {
|
|
Deprecation::notice('2.5', 'Use SS_Log instead. See SS_Log on setting up error email notification.');
|
|
return self::$send_errors_to;
|
|
}
|
|
|
|
/**
|
|
* @param string $emailAddress
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*/
|
|
public static function send_warnings_to($emailAddress) {
|
|
Deprecation::notice('2.5', 'Use SS_Log instead. See SS_Log on setting up error email notification.');
|
|
self::$send_warnings_to = $emailAddress;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
* @deprecated 2.5 See SS_Log on setting up error email notification
|
|
*/
|
|
public static function get_send_warnings_to() {
|
|
Deprecation::notice('2.5', 'Use SS_Log instead. See SS_Log on setting up error email notification.');
|
|
return self::$send_warnings_to;
|
|
}
|
|
|
|
/**
|
|
* Call this to enable logging of errors.
|
|
* @deprecated 2.5 See SS_Log on setting up error file logging
|
|
*/
|
|
public static function log_errors_to($logFile = ".sserrors") {
|
|
Deprecation::notice('2.5', 'Use SS_Log instead. See SS_Log on setting up error file logging.');
|
|
self::$log_errors_to = $logFile;
|
|
}
|
|
|
|
public static function caller() {
|
|
$bt = debug_backtrace();
|
|
$caller = $bt[2];
|
|
$caller['line'] = $bt[1]['line'];
|
|
$caller['file'] = $bt[1]['file'];
|
|
if(!isset($caller['class'])) $caller['class'] = '';
|
|
if(!isset($caller['type'])) $caller['type'] = '';
|
|
return $caller;
|
|
}
|
|
|
|
/**
|
|
* @deprecated 2.5 Please use {@link SS_Backtrace::backtrace()}
|
|
*/
|
|
public static function backtrace($returnVal = false, $ignoreAjax = false) {
|
|
Deprecation::notice('2.5', 'Use SS_Backtrace::backtrace instead.');
|
|
return SS_Backtrace::backtrace($returnVal, $ignoreAjax);
|
|
}
|
|
|
|
/**
|
|
* @deprecated 2.5 Please use {@link SS_Backtrace::get_rendered_backtrace()}
|
|
*/
|
|
public static function get_rendered_backtrace($bt, $plainText = false) {
|
|
Deprecation::notice('2.5', 'Use SS_Backtrace::get_rendered_backtrace() instead.');
|
|
return SS_Backtrace::get_rendered_backtrace($bt, $plainText);
|
|
}
|
|
|
|
/**
|
|
* Check if the user has permissions to run URL debug tools,
|
|
* else redirect them to log in.
|
|
*/
|
|
public static function require_developer_login() {
|
|
if(Director::isDev()) {
|
|
return;
|
|
}
|
|
if(isset($_SESSION['loggedInAs'])) {
|
|
// We have to do some raw SQL here, because this method is called in Object::defineMethods().
|
|
// This means we have to be careful about what objects we create, as we don't want Object::defineMethods()
|
|
// being called again.
|
|
// This basically calls Permission::checkMember($_SESSION['loggedInAs'], 'ADMIN');
|
|
|
|
$memberID = $_SESSION['loggedInAs'];
|
|
|
|
$groups = DB::query("SELECT \"GroupID\" from \"Group_Members\" WHERE \"MemberID\" = " . $memberID);
|
|
$groupCSV = implode($groups->column(), ',');
|
|
|
|
$permission = DB::query("
|
|
SELECT \"ID\"
|
|
FROM \"Permission\"
|
|
WHERE (
|
|
\"Code\" = 'ADMIN'
|
|
AND \"Type\" = " . Permission::GRANT_PERMISSION . "
|
|
AND \"GroupID\" IN ($groupCSV)
|
|
)
|
|
")->value();
|
|
|
|
if($permission) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// This basically does the same as
|
|
// Security::permissionFailure(null, "You need to login with developer access to make use of debugging tools.")
|
|
// We have to do this because of how early this method is called in execution.
|
|
$_SESSION['Security']['Message']['message']
|
|
= "You need to login with developer access to make use of debugging tools.";
|
|
$_SESSION['Security']['Message']['type'] = 'warning';
|
|
$_SESSION['BackURL'] = $_SERVER['REQUEST_URI'];
|
|
header($_SERVER['SERVER_PROTOCOL'] . " 302 Found");
|
|
header("Location: " . Director::baseURL() . Security::login_url());
|
|
die();
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Generic callback, to catch uncaught exceptions when they bubble up to the top of the call chain.
|
|
*
|
|
* @ignore
|
|
* @param Exception $exception
|
|
*/
|
|
function exceptionHandler($exception) {
|
|
$errno = E_USER_ERROR;
|
|
$type = get_class($exception);
|
|
$message = "Uncaught " . $type . ": " . $exception->getMessage();
|
|
$file = $exception->getFile();
|
|
$line = $exception->getLine();
|
|
$context = $exception->getTrace();
|
|
Debug::fatalHandler($errno, $message, $file, $line, $context);
|
|
}
|
|
|
|
/**
|
|
* Generic callback to catch standard PHP runtime errors thrown by the interpreter
|
|
* or manually triggered with the user_error function.
|
|
* Caution: The error levels default to E_ALL is the site is in dev-mode (set in main.php).
|
|
*
|
|
* @ignore
|
|
* @param int $errno
|
|
* @param string $errstr
|
|
* @param string $errfile
|
|
* @param int $errline
|
|
*/
|
|
function errorHandler($errno, $errstr, $errfile, $errline) {
|
|
switch($errno) {
|
|
case E_ERROR:
|
|
case E_CORE_ERROR:
|
|
case E_USER_ERROR:
|
|
Debug::fatalHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
|
|
break;
|
|
|
|
case E_WARNING:
|
|
case E_CORE_WARNING:
|
|
case E_USER_WARNING:
|
|
Debug::warningHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
|
|
break;
|
|
|
|
case E_NOTICE:
|
|
case E_USER_NOTICE:
|
|
case E_DEPRECATED:
|
|
case E_USER_DEPRECATED:
|
|
case E_STRICT:
|
|
Debug::noticeHandler($errno, $errstr, $errfile, $errline, debug_backtrace());
|
|
break;
|
|
}
|
|
}
|