silverstripe-framework/core/Debug.php

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<?php
/**
* Class of static methods to support debugging.
*/
class Debug {
/**
* @var $mail_server string Custom mailserver for sending debug mails.
*/
protected static $custom_smtp_server = '';
protected static $send_errors_to;
protected static $send_warnings_to;
/**
* Show the contents of val in a debug-friendly way.
* Debug::show() is intended to be equivalent to dprintr()
*/
static function show($val, $showHeader = true) {
if(!Director::isLive()) {
if($showHeader) {
$caller = Debug::caller();
if(Director::is_ajax())
echo "Debug ($caller[class]$caller[type]$caller[function]() in line $caller[line] of " . basename($caller['file']) . ")\n";
else
echo "<div style=\"background-color: white; text-align: left; width: 50em\">\n<hr>\n<h3>Debug <span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]() \n<span style=\"font-weight:normal\">in line</span> $caller[line] \n<span style=\"font-weight:normal\">of</span> " . basename($caller['file']) . ")</span>\n</h3>\n";
}
echo Debug::text($val);
if(!Director::is_ajax()) echo "</div>";
}
}
static function mailBuffer( $email, $subject ) {
mail( $email, $subject, ob_get_contents() );
ob_end_clean();
}
static function endshow($val) {
if(!Director::isLive()) {
$caller = Debug::caller();
echo "<hr>\n<h3>Debug \n<span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]() \n<span style=\"font-weight:normal\">in line</span> $caller[line] \n<span style=\"font-weight:normal\">of</span> " . basename($caller['file']) . ")</span>\n</h3>\n";
echo Debug::text($val);
die();
}
}
static function text($val) {
if(is_object($val) && $val->hasMethod('debug')) {
return $val->debug();
} else {
if(is_array($val)) {
$result = "<ul>\n";
foreach($val as $k => $v) {
$result .= "<li>$k = " . Debug::text($v) . "</li>\n";
}
$val = $result . "</ul>\n";
} else if (is_object($val)) {
$val = var_export($val, true);
} else {
if(true || !Director::is_ajax()) {
$val = "<pre style=\"font-family: Courier new\">" . htmlentities($val) . "</pre>\n";
}
}
return $val;
}
}
/**
* Show a debugging message
*/
static function message($message, $showHeader = true) {
if(!Director::isLive()) {
$caller = Debug::caller();
$file = basename($caller['file']);
echo "<p style=\"background-color: white; color: black; width: 95%; margin: 0.5em; padding: 0.3em; border: 1px #CCC solid\">\n";
if($showHeader) echo "<b>Debug (line $caller[line] of $file):</b>\n ";
echo Convert::raw2xml(trim($message)) . "</p>\n";
}
}
/**
* Load an error handler
*/
static function loadErrorHandlers() {
Debug::loadFatalErrorHandler();
}
static function loadFatalErrorHandler() {
set_error_handler('errorHandler', E_ALL & ~E_NOTICE);
}
static function warningHandler($errno, $errstr, $errfile, $errline, $errcontext) {
if(self::$send_warnings_to) self::emailError(self::$send_warnings_to, $errno, $errstr, $errfile, $errline, $errcontext, "Warning");
if(Director::isDev()) {
self::showError($errno, $errstr, $errfile, $errline, $errcontext);
die();
}
}
static function fatalHandler($errno, $errstr, $errfile, $errline, $errcontext) {
if(self::$send_errors_to) self::emailError(self::$send_errors_to, $errno, $errstr, $errfile, $errline, $errcontext, "Error");
if(Director::isDev()) {
Debug::showError($errno, $errstr, $errfile, $errline, $errcontext);
} else {
Debug::friendlyError($errno, $errstr, $errfile, $errline, $errcontext);
}
die();
}
static function friendlyError($errno, $errstr, $errfile, $errline, $errcontext) {
header("HTTP/1.0 500 Internal server error");
if(Director::is_ajax()) {
echo "ERROR:There has been an error";
} else {
if(file_exists('../assets/error-500.html')) {
echo "ERROR:";
include('../assets/error-500.html');
} else {
echo "ERROR:<h1>Error</h1><p>The website server has not been able to respond to your request.</p>\n";
}
}
}
static function showError($errno, $errstr, $errfile, $errline, $errcontext) {
if(!headers_sent()) header("HTTP/1.0 500 Internal server error");
if(Director::is_ajax()) {
echo "ERROR:Error $errno: $errstr\n At l$errline in $errfile\n";
Debug::backtrace();
} else {
echo "<div style=\"border: 5px red solid\">\n";
echo "<p style=\"color: white; background-color: red; margin: 0\">FATAL ERROR: $errstr<br />\n At line $errline in $errfile<br />\n<br />\n</p>\n";
Debug::backtrace();
echo "<h2>Context</h2>\n";
Debug::show($errcontext);
echo "</div>\n";
}
}
static function emailError($emailAddress, $errno, $errstr, $errfile, $errline, $errcontext, $errorType = "Error") {
if(strtolower($errorType) == 'warning') {
$colour = "orange";
} else {
$colour = "red";
}
$data = "<div style=\"border: 5px $colour solid\">\n";
$data .= "<p style=\"color: white; background-color: $colour; margin: 0\">$errorType: $errstr<br /> At line $errline in $errfile\n<br />\n<br />\n</p>\n";
$data .= Debug::backtrace(true);
$data .= "</div>\n";
// override smtp-server if needed
if(self::$custom_smtp_server) {
ini_set("SMTP", self::$custom_smtp_server);
}
mail($emailAddress, "$errorType on $_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]", $data, "Content-type: text/html\nFrom: errors@silverstripe.com");
}
/**
* @param string $server IP-Address or domain
*/
static function set_custom_smtp_server($server) {
self::$custom_smtp_server = $server;
}
/**
* @return string
*/
static function get_custom_smtp_server() {
return self::$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");
* @param emailAddress The email address to send them to
* @param sendWarnings Set to true to send warnings as well as errors.
*/
static function send_errors_to($emailAddress, $sendWarnings = true) {
self::$send_errors_to = $emailAddress;
self::$send_warnings_to = $sendWarnings ? $emailAddress : null;
}
/**
* @return string
*/
static function get_send_errors_to() {
return self::$send_errors_to;
}
/**
* @return string
*/
static function get_send_warnings_to() {
return self::$send_warnings_to;
}
/**
* Deprecated. Send live errors and warnings to the given address.
* Use send_errors_to() instead.
*/
static function sendLiveErrorsTo($emailAddress) {
if(!Director::isDev()) self::send_errors_to($emailAddress, true);
}
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 $caller;
}
static function backtrace($returnVal = false, $ignoreAjax = false) {
$bt = debug_backtrace();
// Ingore functions that are plumbing of the error handler
$ignoredFunctions = array('Debug::emailError','Debug::warningHandler','Debug::fatalHandler','errorHandler','Debug::showError','Debug::backtrace');
while( $bt && in_array(self::full_func_name($bt[0]), $ignoredFunctions) ) {
array_shift($bt);
}
$result = "";
foreach($bt as $item) {
if(Director::is_ajax() && !$ignoreAjax) {
$result .= self::full_func_name($item,true) . "\n";
$result .= "line $item[line] of " . basename($item['file']) . "\n\n";
} else {
$result .= "<p><b>" . self::full_func_name($item,true) . "</b>\n<br />\n";
$result .= isset($item['line']) ? "line $item[line] of " : '';
$result .= isset($item['file']) ? basename($item['file']) : '';
$result .= "</p>\n";
}
}
if($returnVal) return $result;
else echo $result;
}
/**
* Return the full function name. If showArgs is set to true, a string representation of the arguments will be shown
*/
static function full_func_name($item, $showArgs = false) {
$funcName = '';
if(isset($item['class'])) $funcName .= $item['class'];
if(isset($item['type'])) $funcName .= $item['type'];
if(isset($item['function'])) $funcName .= $item['function'];
if($showArgs && isset($item['args'])) {
@$funcName .= "(" . implode(",", (array)$item['args']) .")";
}
return $funcName;
}
}
function errorHandler($errno, $errstr, $errfile, $errline, $errcontext) {
switch($errno) {
case E_ERROR:
case E_CORE_ERROR:
case E_USER_ERROR:
Debug::fatalHandler($errno, $errstr, $errfile, $errline, $errcontext);
break;
case E_WARNING:
case E_CORE_WARNING:
case E_USER_WARNING:
Debug::warningHandler($errno, $errstr, $errfile, $errline, $errcontext);
break;
}
}
?>