Regex
Performs a search and replace operation using PHP Perl-compatible regex (see example). This tool requires that you know the regex syntax.
Source code (hide)
Global files are not shown below.
Table of contents
index.php
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<?php
/* globals, templates */
$locals = array (
'title' => 'Regex',
'description' => 'Performs a search and replace operation using <a href="http://www.regular-expressions.info/php.html" title="tutorial on PHP regex">PHP Perl-compatible regex</a> (<a href="' . $script_path . '?isExample=1" title="example">see example</a>). This tool requires that you know the regex syntax.',
'files' => array('index.php')
);
include('../globals/globals.php');
/* watch for form submission */
if($_POST) {
/* variables */
$input = array(
'search' => htmlspecialchars(stripslashes($_POST['search'])),
'replace' => htmlspecialchars(stripslashes($_POST['replace'])),
'text' => htmlspecialchars(stripslashes($_POST['text'])),
'caseSensitive' => $_POST['caseSensitive'],
'multiline' => $_POST['multiline'],
'dotAll' => $_POST['dotAll'],
'diff' => $_POST['diff'],
'example' => $_GET['example']
);
// example
if($input['example']) {
$input = array(
'search' => 'foo',
'replace' => 'blah',
'text' => 'blah blah foo blah'
);
}
/* errorcheck */
// missing fields
if(empty($input['search']) or empty($input['text'])) {
echo '<p class="fail">Please provide a search pattern and text.</p>';
}
else {
/* escape delimiter */
$regex['search'] = preg_replace('/\//','\/',$input['search']);
/* create regex */
$regex['search'] = '/(' . $regex['search'] . ')/';
if(!$input['caseSensitive']) {
$regex['search'] = $regex['search'] . 'i';
}
if($input['multiline']) {
$regex['search'] = $regex['search'] . 'm';
}
if($input['dotAll']) {
$regex['search'] = $regex['search'] . 's';
}
/* filter text */
$output['text'] = preg_replace($regex['search'],$input['replace'],$input['text']);
/* create diff */
if($input['diff']) {
$diff['search'] = $regex['search'];
$diff['replaceOld'] = '<del>$1</del>';
$diff['replaceNew'] = '<ins>' . $input['replace'] . '</ins>';
$diff['textOld'] = preg_replace($diff['search'],$diff['replaceOld'],$input['text']);
$diff['textNew'] = preg_replace($diff['search'],$diff['replaceNew'],$input['text']);
}
}
}
/* output */
// debug
gDebug(get_defined_vars());
// diff
if($input['diff']) {
?>
<h2>Changes (diff)</h2>
<table>
<tr>
<th>Input text</th>
<th>Filtered text</th>
</tr>
<tr>
<td valign="top" style="width:45%;">
<pre style="overflow:auto; width:95%;"><?php echo $diff['textOld']; ?></pre>
</td>
<td valign="top" style="width:45%;">
<pre style="overflow:auto; width:95%;"><?php echo $diff['textNew']; ?></pre>
</td>
</tr>
</table>
<?php
}
// result
if($output['text']) {
?>
<h2>Processed result</h2>
<strong>search:</strong> <?php echo $regex['search']; ?><br />
<strong>replace:</strong> <?php echo $regex['replace']; ?><br />
<textarea
rows="7"
cols="100"
readonly="readonly"><?php echo $output['text']; ?></textarea>
<?php
}
// input form
?>
<h2>Input form</h2>
<form action="index.php" method="post">
<p class="instruction">Write a regex search pattern in the first box (without delimiters) and the replace pattern in the second. For example, "(colo)u?(r)" and "$1$2" without quotations will replace any instance of "colour" with "color". Enter the text you want to execute the patterns on in the third box.</p>
<label for="search">Search:</label><br />
<textarea
id="search"
name="search"
rows="12"
cols="4"
style="height:5em;"><?php echo $input['search']; ?></textarea><br />
<label for="replace">Replace:</label><br />
<textarea
id="replace"
name="replace"
rows="12"
cols="4"
style="height:5em;"><?php echo $input['replace']; ?></textarea><br />
<label for="text">Text:</label>
<textarea
id="text"
name="text"
rows="12"
cols="12"><?php echo $input['text']; ?></textarea><br />
<input type="submit" value="Execute patterns" /><br />
<input type="reset" value="Reset form" />
<fieldset>
<legend>Extended options</legend>
<input
type="checkbox"
id="caseSensitive"
name="caseSensitive"
<?php gCheckBox($input['caseSensitive']); ?>
/>
<label for="caseSensitive">case sensitive</label><br />
<input
type="checkbox"
id="multiline"
name="multiline"
<?php gCheckBox($input['multiline']); ?>
/>
<label for="multiline">^$ match every line (multiline mode)</label><br />
<input
type="checkbox"
id="dotAll"
name="dotAll"
<?php gCheckBox($input['dotAll']); ?>
/>
<label for="dotAll">. matches newlines</label><br /><br />
<input
type="checkbox"
id="diff"
name="diff"
<?php gCheckBox($input['diff']); ?>
/>
<label for="diff">show changes (diff)</label><br />
<?php gDebugOption(); ?>
</fieldset>
</form>
<?php
/* globals, templates */
makeFooter();
?>
Input form
This tool is written and copyright by Jesse Plamondon-Willard (Pathoschild). You may freely use, distribute, and modify this script in any way and for any purpose, so long as you cite the above name as original author.