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<?php
/**
* Simple script to help with regex construction/debugging. Put it
* somewhere on your webserver and point your browser to it.
*
* Based on: http://myfluffydog.com/programming/php/scripts/regexp.php
*/
require 'Horde/Util.php';
$regexp = Util::getFormData('regexp');
$subject = Util::getFormData('subject');
$submit = Util::getFormData('submit');
@set_time_limit(2);
function unhtmlentities($string)
{
$trans_tbl = get_html_translation_table(HTML_ENTITIES);
$trans_tbl = array_flip($trans_tbl);
return strtr($string, $trans_tbl);
}
if ($submit == "Test") { // doing a reg expression search -- get variables
$unescapedRegexp = unhtmlentities($regexp); // for search
$escapedRegexp = htmlentities($regexp); // for showing on page and in textarea
$text = $subject;
$text = stripslashes($text);
$text = unhtmlentities($text); // for search
$escapedText = htmlentities($text);// for textarea
// Do preg_replace on source, substituting matched_text with [b]matched_text[/b]
$highlightedText = preg_replace($unescapedRegexp, '[b]\\0[/b]', $text);
// convert htmlentities
$highlightedText = htmlentities($highlightedText);
// replace [b] with <b> and [/b] with </b>
$highlightedText = str_replace('[b]', '<span class="highlight">', $highlightedText);
$highlightedText = str_replace('[/b]', '</span>', $highlightedText);
}
?>
<html>
<head>
<title>Test regular expressions</title>
<style type="text/css">
<!--
h1 {
font-size: large;
}
.fixed {
font-size: 10px;
font-family: monospace,fixed;
color: #000099;
background-color: #cccccc;
}
.notes {
font-size: small;
color: #000099;
background-color: #cccccc;
}
.highlight {
color: #000066;
background-color: #ffff00;
}
.empty {
background-color: #ff9933
}
-->
</style>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#FFFFFF">
<h1>Test <a href="http://www.php.net/manual/en/ref.pcre.php">PHP Regular Expression Functions (Perl-Compatible)</a></h1>
<div class="fixed">preg_match_all($pattern, $subject, $matches, PREG_SET_ORDER)</div>
<form name="form1" method="post" action="<?php echo $_SERVER['PHP_SELF'] ?>">
<p><strong>Enter your regular expression ($pattern):</strong><br />
<textarea name="regexp" cols="80" rows="6" id="regexp"><?php if($submit){echo $escapedRegexp;}?></textarea>
<br />
<strong>Enter text to search against in the textarea below ($subject):</strong><br />
<textarea name="subject" cols="80" rows="3"><?php if($subject){echo $escapedText;}?></textarea>
<br />
<input type="submit" name="submit" value="Test">
<input type="reset" name="Reset" value="Reset">
<a href='<?php echo $_SERVER['PHP_SELF'] ?>'>Home</a><br />
</p>
</form>
<hr>
<?php
if ($submit){ // only shows up on results page
if (preg_match_all($unescapedRegexp, $text, $results, PREG_SET_ORDER)) { // found match
echo "The regexp <strong> $escapedRegexp </strong> matched!\n<p>";
echo "<h1>Here's what was matched searching the text you entered:</h1>\n";
$y = 0;
echo '<div class="fixed">';
foreach ($results as $loop_result) {
$x = 0;
foreach ($loop_result as $loop_result2){
if ($x != 0) {
/* Indent subpatterns. */
echo "<blockquote>";
}
printf('$matches[%s][%s]: ', $y, $x);// show variable name
if (!$loop_result2){
echo '<span class="empty">Empty</span>';
} else {
echo '<span class="highlight">' . htmlentities($loop_result2) . '</span>';
}
if ($x != 0) {
echo "</blockquote>";
} else {
echo "<p />";
}
$x++;
}
$y++;
}
echo '</div>';
} else { // no match
echo "regexp <strong> $escapedRegexp </strong> doesn't return any results\n<p>";
}
?>
<h1>Searched text with matches <span class='highlight'>highlighted</span></h1>
<?php // Show searched text with matches highlighted
echo '<pre>';
echo $highlightedText;
echo '</pre><hr>';
}
?>
<div class="notes">
<h1>Example regular expressions:</h1>
<p><strong>{<!--(?:.|\s)*?-->}</strong> -- Shows comments in html </p>
<ul>
<li><strong>{</strong> open delimiter</li>
<li><strong><!--</strong> search for opening comment tag</li>
<li><strong>(?:.|\s)*</strong> any number of characters or white space</li>
<li><strong>?</strong> non-greedy</li>
<li><strong>--></strong> search for closing comment tag</li>
<li><strong>}</strong> close delimiter</li>
</ul>
<p><strong>{<style type(?:.|\s)*?</style>}</strong> -- Shows styles</p>
<p>Notes:</p>
<ul>
<li>The results page shows the individual matches and subpattern matches, and the original text with the matches highlighted.</li>
<li>Might not be able to search for html entities like "&amp;" because of the converting for display and textareas (the search pattern (regexp) and non-url subjects are processed by unhtmlentities)</li>
</ul></div>
</body>
</html>
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