@', '', str_replace('\"', '"', $text));
// Undo the escaping in the prepare step
$text = decode_entities($text);
// Trim leading and trailing linebreaks
$text = trim($text, "\r\n");
// Highlight as PHP
$text = ''. highlight_string("", 1) .'
';
// In PHP4, highlight_string() returns font tags; replace them with span tags.
$text = str_replace(array(''), $text);
// Remove newlines to avoid clashing with the linebreak filter
$text = str_replace("\n", '', $text);
return codefilter_fix_spaces($text);
}
/**
* Helper function for codefilter_process_code().
*/
function codefilter_process_php_inline($matches) {
// Undo nl2br
$text = str_replace('
', '', $matches[0]);
// Decode entities (the highlighter re-entifies) and highlight text
$text = highlight_string(decode_entities($text), 1);
// In PHP4, highlight_string() returns font tags; replace them with span tags.
$text = str_replace(array(''), $text);
// Remove PHP's own added code tags
$text = str_replace(array('', '', "\n"), array('', '', ''), $text);
return $text;
}
/**
* Processes chunks of escaped code into HTML.
*/
function codefilter_process_code($text) {
// Undo linebreak escaping
$text = str_replace('
', "\n", $text);
// Inline or block level piece?
$multiline = strpos($text, "\n") !== FALSE;
// Note, pay attention to odd preg_replace-with-/e behaviour on slashes
$text = preg_replace("/^\n/", '', preg_replace('@@', '', str_replace('\"', '"', $text)));
// Trim leading and trailing linebreaks
$text = trim($text, "\n");
// Escape newlines
$text = nl2br($text);
// PHP code in regular code
$text = preg_replace_callback('/<\?php.+?\?>/s', 'codefilter_process_php_inline', $text);
$text = ''. codefilter_fix_spaces(str_replace(' ', ' ', $text)) .'';
if ($multiline) $text = ''. $text .'
';
// Remove newlines to avoid clashing with the linebreak filter
return str_replace("\n", '', $text);
}
function codefilter_fix_spaces($text) {
return preg_replace('@ (?! )@', ' ', $text);
}
/**
* Escape code blocks during input filter 'prepare'.
*
* @param $text
* The string to escape.
* @param $type
* The type of code block, either 'code' or 'php'.
* @return
* The escaped string.
*/
function codefilter_escape($text, $type = 'code') {
// Note, pay attention to odd preg_replace-with-/e behaviour on slashes
$text = check_plain(str_replace('\"', '"', $text));
// Protect newlines from line break converter
$text = str_replace(array("\r", "\n"), array('', '
'), $text);
// Add codefilter escape tags
$text = "[codefilter_$type]{$text}[/codefilter_$type]";
return $text;
}
/**
* Implementation of hook_filter()
*/
function codefilter_filter($op, $delta = 0, $format = -1, $text = '') {
switch ($op) {
case 'list':
return array(0 => t('Code filter'));
case 'description':
return t('Allows users to post code verbatim using <code> and <?php ?> tags.');
case 'prepare':
/* Note: we replace , , [?php ?], <% %>, and [% %]
to prevent other filters from acting on them. */
$text = preg_replace('@(.+?)@se', "codefilter_escape('$1', 'code')", $text);
$text = preg_replace('@[\[<](\?php|%)(.+?)(\?|%)[\]>]@se', "codefilter_escape('$2', 'php')", $text);
return $text;
case 'process':
$text = preg_replace('@\[codefilter_code\](.+?)\[/codefilter_code\]@se', "codefilter_process_code('$1')", $text);
$text = preg_replace('@\[codefilter_php\](.+?)\[/codefilter_php\]@se', "codefilter_process_php('$1')", $text);
return $text;
default:
return $text;
}
}