silverstripe-framework/core/Convert.php
Hayden Smith 4a5d9b03f8 Moved Sapphire module to open source path
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@39001 467b73ca-7a2a-4603-9d3b-597d59a354a9
2007-07-19 10:40:28 +00:00

312 lines
9.3 KiB
PHP
Executable File

<?php
/**
* Library of conversion functions, implemented as static methods.
*
* The methods are all of the form (format)2(format), where the format is one of
*
* raw: A UTF8 string
* attr: A UTF8 string suitable for inclusion in an HTML attribute
* js: A UTF8 string suitable for inclusion in a double-quoted javascript string.
*
* array: A PHP associative array
* json: JavaScript object notation
*
* html: HTML source suitable for use in a page or email
* text: Plain-text content, suitable for display to a user as-is, or insertion in a plaintext email.
*/
class Convert extends Object {
// Convert raw to other formats
static function raw2att($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::raw2att($v);
return $val;
} else {
return str_replace(array('&','"',"'",'<','>'),array('&amp;','&quot;','&#39;','&lt;','&gt;'),$val);
}
}
/**
* @see http://www.w3.org/TR/REC-html40/types.html#type-cdata
*/
static function raw2htmlatt($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::raw2att($v);
return $val;
} else {
$val = str_replace(array('&','"',"'",'<','>'),array('&amp;','&quot;','&#39;','&lt;','&gt;'),$val);
$val = preg_replace('^[a-zA-Z0-9\-_]','_', $val);
$val = preg_replace('^[0-9]*','', $val); //
return $val;
}
}
static function raw2xml($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::raw2xml($v);
return $val;
} else {
return str_replace(array('&', '<', '>', "\n"), array('&amp;', '&lt;', '&gt;', '<br />'), $val);
}
}
static function raw2js($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::raw2js($v);
return $val;
} else {
return str_replace(array('"',"\n","\r", "'"), array('\"','\n','\r', "\'"), $val);
}
}
// TODO Possible security risk: doesn't support arrays with more than one level - should be called recursively
static function raw2sql($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::raw2sql($v);
return $val;
} else {
return addslashes($val);
}
}
/**
* Convert XML to raw text
* @todo Currently &#xxx; entries are stripped; they should be converted
*/
static function xml2raw($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::xml2raw($v);
return $val;
} else {
// More complex text needs to use html2raw instaed
if(strpos($val,'<') !== false) return self::html2raw($val);
// For simpler stuff, a simple str_replace will do
else {
$converted = str_replace(array('&amp;', '&lt;', '&gt;'), array('&', '<', '>'), $val);
$converted = ereg_replace('&#[0-9]+;', '', $converted);
return $converted;
}
}
}
static function xml2js($val) {
return self::raw2js(self::html2raw($val));
}
static function xml2att($val) {
return self::raw2att(self::xml2raw($val));
}
static function xml2sql($val) {
return self::raw2sql(self::xml2raw($val));
}
// Convert JS to other formats
static function js2raw($val) {
if(is_array($val)) {
foreach($val as $k => $v) $val[$k] = self::js2raw($v);
return $val;
} else {
return str_replace(array('\"','\n','\r'), array('"',"\n","\r"), $val);
}
}
static function js2xml($val) {
return self::raw2xml(self::js2raw($val));
}
static function js2att($val) {
return self::raw2att(self::js2raw($val));
}
static function js2sql($val) {
return self::raw2sql(self::js2raw($val));
}
static function xml2array($val) {
return preg_split( '/\s*(<[^>]+>)|\s\s*/', $val, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
}
static function array2json( $array ) {
$result = array();
// Debug::show($array);
foreach( $array as $key => $value )
if( is_array( $value ) )
$result[] = "'$key':" . Convert::array2json( $value );
else
$result[] = "'$key':'$value'";
return '{' . implode( ', ', $result ) . '}';
}
/**
* Create a link if the string is a valid URL
* @param string The string to linkify
* @return A link to the URL if string is a URL
*/
static function linkIfMatch($string) {
if( preg_match( '/^[a-z+]+\:\/\/[a-zA-Z0-9$-_.+?&=!*\'()%]+$/', $string ) )
return "<a style=\"white-space: nowrap\" href=\"$string\">$string</a>";
else
return $string;
}
/**
* Create a link if the string is a valid URL
* @param string The string to linkify
* @return A link to the URL if string is a URL
*/
/*static function mailtoIfMatch($string) {
if( preg_match( '/^[a-z+]+\:\/\/[a-zA-Z0-9$-_.+?&=!*\'()%]+$/', $string ) )
return "<a href=\"$string\">$string</a>";
else
return $string;
}*/
/**
* Simple conversion of HTML to plaintext.
*
* @param $data string
* @param $preserveLinks boolean
* @param $wordwrap array
*/
static function html2raw($data, $preserveLinks = false, $wordWrap = 60, $config = null) {
$defaultConfig = array(
'PreserveLinks' => false,
'ReplaceBoldAsterisk' => true,
'CompressWhitespace' => true,
'ReplaceImagesWithAlt' => true,
);
if(isset($config)) {
$config = array_merge($defaultConfig,$config);
} else {
$config = $defaultConfig;
}
// sTRIp style and script
/* $data = eregi_replace("<style(^A-Za-z0-9>][^>]*)?>.*</style[^>]*>","", $data);*/
/* $data = eregi_replace("<script(^A-Za-z0-9>][^>]*)?>.*</script[^>]*>","", $data);*/
$data = preg_replace("/<style(^A-Za-z0-9>][^>]*)?>.*?<\/style[^>]*>/i","", $data);
$data = preg_replace("/<script(^A-Za-z0-9>][^>]*)?>.*?<\/script[^>]*>/i","", $data);
// TODO Deal with attributes inside tags
if($config['ReplaceBoldAsterisk']) {
$data = str_ireplace(
array('<strong>','</strong>','<b>','</b>'),
'*',
$data
);
}
// Expand hyperlinks
if( !$preserveLinks && !$config['PreserveLink']) {
$data = preg_replace('/<a[^>]*href\s*=\s*"([^"]*)">(.*?)<\/a>/ie', "Convert::html2raw('\\2').'[\\1]'", $data);
$data = preg_replace('/<a[^>]*href\s*=\s*([^ ]*)>(.*?)<\/a>/ie', "Convert::html2raw('\\2').'[\\1]'", $data);
/* $data = eregi_replace('<a[^>]*href *= *"([^"]*)">([^<>]*)</a>', '\\2 [\\1]', $data); */
/* $data = eregi_replace('<a[^>]*href *= *([^ ]*)>([^<>]*)</a>', '\\2 [\\1]', $data); */
}
// Replace images with their alt tags
if($config['ReplaceImagesWithAlt']) {
$data = eregi_replace('<img[^>]*alt *= *"([^"]*)"[^>]*>', ' \\1 ', $data);
$data = eregi_replace('<img[^>]*alt *= *([^ ]*)[^>]*>', ' \\1 ', $data);
}
// Compress whitespace
if($config['CompressWhitespace']) {
$data = ereg_replace("[\n\r\t ]+", " ", $data);
}
// Parse newline tags
$data = ereg_replace("[ \n\r\t]*<[Hh][1-6]([^A-Za-z0-9>][^>]*)?> *", "\n\n", $data);
$data = ereg_replace("[ \n\r\t]*<[Pp]([^A-Za-z0-9>][^>]*)?> *", "\n\n", $data);
$data = ereg_replace("[ \n\r\t]*<[Dd][Ii][Vv]([^A-Za-z0-9>][^>]*)?> *", "\n\n", $data);
$data = ereg_replace("\n\n\n+","\n\n", $data);
$data = ereg_replace("<[Bb][Rr]([^A-Za-z0-9>][^>]*)?> *", "\n", $data);
$data = ereg_replace("<[Tt][Rr]([^A-Za-z0-9>][^>]*)?> *", "\n", $data);
$data = ereg_replace("</[Tt][Dd]([^A-Za-z0-9>][^>]*)?> *", " ", $data);
$data = preg_replace('/<\/p>/i', "\n\n", $data );
// Replace HTML entities
$data = preg_replace("/&#([0-9]+);/e", 'chr(\1)', $data);
$data = str_replace(array("&lt;","&gt;","&amp;","&nbsp;"), array("<", ">", "&", " "), $data);
// Remove all tags (but optionally keep links)
// strip_tags seemed to be restricting the length of the output
// arbitrarily. This essentially does the same thing.
if( !$preserveLinks ) {
$data = preg_replace('/<\/?[^>]*>/','', $data);
} else {
$data = strip_tags($data, '<a>');
}
return trim(wordwrap(trim($data), $wordWrap));
}
/**
* There are no real specifications on correctly encoding mailto-links,
* but this seems to be compatible with most of the user-agents.
* Does nearly the same as rawurlencode().
* Please only encode the values, not the whole url, e.g.
* "mailto:test@test.com?subject=" . Convert::raw2mailto($subject)
*
* @param $data string
* @return string
* @see http://www.ietf.org/rfc/rfc1738.txt
*/
static function raw2mailto($data) {
return str_ireplace(
array("\n",'?','=',' ','(',')','&','@','"','\'',';'),
array('%0A','%3F','%3D','%20','%28','%29','%26','%40','%22','%27','%3B'),
$data
);
}
////////////////////////////////////////////////////////////////////////////////////////////////
// Deprecated
/**
* Converts the given val from a raw string into HTML.
* has support for multibyte charaters.
*
* @param $val the string you wish to convert
* @return the HTML version of the string
*/
static function raw2html($val) {
user_error("Convert::raw2xml is deprecated. Used Convert::raw2xml instead", E_USER_WARNING);
return self::raw2xml($val);
}
static function html2plain($val){
user_error("html2plain is deprecated. Use xml2raw instead.", E_USER_WARNING);
return self::html2raw($val);
}
static function html2text($val, $preserveLinks = false) {
user_error("html2text is deprecated. Use xml2raw instead.", E_USER_WARNING);
return self::html2raw($val);
}
static function raw2reserveNL($val){
user_error("Convert::raw2reserveNL is deprecated. Used Convert::raw2xml instead", E_USER_WARNING);
return self::raw2xml($val);
}
static function raw2attr($val) {
user_error("raw2attr is deprecated. Use raw2att instead.", E_USER_WARNING);
return self::raw2att($val);
}
}
?>