how to validate numbers and special characters only with regex in php

Question

i have function to validate user input a against numbers-special chars pattern (no alpha)but i have not do it exactly,and i searched over the internet to find such this but i not find,any help

function  validate_num($input){

    return ( ! preg_match("^[0-9*#+]+$", $input)) ? FALSE : TRUE;


}

You forgot the regex delimiters - `"/^[0-9*#+]+$/"`. But it is not clear what format you need to support, please add valid and invalid sample inputs — Wiktor Stribiżew, Oct 16 '16 at 13:10

score 0 · Accepted Answer · answered Oct 16 '16 at 13:11

The syntax of your RegEx is not right. You need to add / before and after:

preg_match("/^[0-9*#+]+$/", $input))

Your RegEx seems right:

The example from the manual looks like this:

<?php
$subject = "abcdef";
$pattern = '/^def/';
preg_match($pattern, $subject, $matches, PREG_OFFSET_CAPTURE, 3);
print_r($matches);
?>

how to validate numbers and special characters only with regex in php

1 Answers1