> -----Original Message-----
> From: Frank Stanovcak [mailto:[EMAIL PROTECTED]
> Sent: Thursday, September 25, 2008 12:41 PM
> To: php-general@lists.php.net
> Subject: [PHP] Filters and sanitizing a regexp
>
> Is it possible to use the php filter function to sanitize a regular
> expression such as to return just the date part of a string that may
be
> passed by an nonobservant user?
>
> "#\d\d/\d\d/\d\d\d\d#"
>
> input would be something like
> as02/05/2008df
>
> I want to use the filter to give me just the date should some oaf not
> leave
> the date field as just digits.
Using preg_match and numbered groups, you could re-build the variable
like this:
<?php
$var = "as02/05/2008df";
$matches = array();
preg_match("#(\d{2})\D*(\d{2})\D*(\d{4})#", $var, $matches);
if(count($matches) != 4) {
echo "Invalid data<br />";
} else {
$filtered = $matches[1] . $matches[2] . $matches[3];
echo $filtered;
}
?>
HTH,
Todd Boyd
Web Programmer
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