Regular expression (PHP)

Question

Good day, I need to find with a regular expression all matching elements in an array using PHP, but I have a bug.

<?php $a[0]='[email protected]'; $a[1]='[email protected]'; $a[2]='[email protected]'; $a[3]='[email protected]'; $pattern = '[a-z_0-9]+@[a-z]*.[a-z]{2,}'; for ($i=0;$i<=3;++$i) { if(preg_match($pattern,$a[i])) { echo $a[i]; } }

Warning: preg_match() [function.preg-match]: Unknown modifier '+' in {path to file} on line 9

Thanks.

it doesn't matter, which quotes used in regex., but I've tried every variant — gJamDev
– gJamDev, Commented Jan 10, 2013 at 14:29

SDC · Accepted Answer · 2013-01-10 15:01:01Z

No need for regex here -- PHP has a built-in email validation function:

filter_var( $email, FILTER_VALIDATE_EMAIL );

See manual page here: http://php.net/manual/en/function.filter-var.php

There's even a filter_var_array() which will save you from even having to have a loop.

I just learn and not specifically apply, but thanks for additional information

Suresh Kamrushi · Accepted Answer · 2013-01-10 14:19:52Z

You can try this-

$a[0]='[email protected]'; $a[1]='[email protected]'; $a[2]='[email protected]'; $a[3]='[email protected]'; for ($i=0;$i<=3;++$i) { if (!preg_match("/^[-_\.a-z0-9]+@([-_a-z0-9]+\.?)*[a-z]{2,6}$/i", $a[$i])) { return false; } return true;

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