php - Preg_match for password always errors -


i'm using password needs 8-20 chars long, numbers, letters , !@#$% symbols:

if (!preg_match('/^(?=.*\d)(?=.*[a-za-z])[0-9a-za-z!@#$%]{8, 20}$/', $_post['password'])) {     $errors[] = true;     $_session['error'] .= '<div class="messages status_red">password must 8-20 long, a-z, 0-9, !@#$% only.</div>';    }

however no matter if meet criteria or not still return error.

i don't see error_reporting messages either.

any idea reason this?

don't put space in {8, 20}. should {8,20}.


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