note 79892 deleted from function.preg-match by tularis
| From: | tularis@php.net | Date: | Thu, 03 Jul 2008 21:37:46 +0000 |
| Subject: | note 79892 deleted from function.preg-match by tularis | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-141142@lists.php.net to get a copy of this message | ||
Note Submitter: bjorn dot padding at gmail dot com
----
To test if a regular expression is syntactically correct:
<?
function preg_test($regex)
{
if (sprintf("%s",@preg_match($regex,'')) == '')
{
$error = error_get_last();
throw new Exception(substr($error['message'],70));
}
else
return true;
}
?>
usage:
<?
if (preg_test('/.*/i'))
print "correct!";
// Returns "correct!"
?>
<?
if (preg_test('/.**/i'))
print "correct!";
// Throws exception with message 'Compilation failed: nothing to repeat at offset 2'
?>