note 2252 deleted from function.ereg by jimw
| From: | jimw@php.net | Date: | Fri, 02 Nov 2001 01:16:49 +0000 |
| Subject: | note 2252 deleted from function.ereg by jimw | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-20109@lists.php.net to get a copy of this message | ||
If you interesting how to validate regex,
maybe next code will be useful for you.
Let we have unknown expression in variable $query.
<pre>
<?
error_reporting(5);
// we don't want any warnings about regex
if ( ereg("($query)?", "") ) {
// if $query is a valid regex then ($query)? too
// "(.*)?" always true on ""
echo "<b>$query</b> is a valid regex<br>\n";
} else {
echo "<b>$query</b> is not a valid regex<br>\n";
}
?>
</pre>