PHP PCRE Tester

preg_match.php

<?php
header('content-type: text/html; charset=utf-8');

$pattern = isset($_POST['pattern']) ? $_POST['pattern'] : '~^$~';
$subject = isset($_POST['subject']) ? $_POST['subject']: '';

?>
<h1>Preg_match tester</h1>

<form method="post">
<p>Pattern:<br><textarea name="pattern" cols="80" rows="4"><?php echo htmlspecialchars($pattern) ?></textarea></p>
<p>Subject:<br><textarea name="subject" cols="80" rows="4"><?php echo htmlspecialchars($subject) ?></textarea></p>
<p><input type="submit" value="Test"></p>

</form>

<?php

$result = preg_match($pattern, $subject, $matches);

?>
<h2>Result</h2>
<?php var_dump($result) ?>

<h2>Matches</h2>
<?php var_dump($matches) ?>

<h2>Input</h2>
<table border="1">
<tr>
	<th>Pattern: </th>
	<td><pre><?php echo htmlspecialchars($pattern) ?></pre></td>
</tr>
<tr>
	<th>Subject: </th>
	<td><pre><?php echo htmlspecialchars($subject) ?></pre></td>
</tr>
</table>