Question

I need a little help I want to check if input matchs with the mask

Mask is this: 12.345.678/9012-34 (xx.xxx.xxx/xxxx-xx)

What I’ve tried till now is this

$string = '12.345.678/9012-34';

if(!preg_match('/^[0-9]{2}.[0-9]{3}.[0-9]{3}/[0-9]{4}-[0-9]{2}$/', $string)) {
     echo 'Doesnt match the mask!';
}

It didn’t work out. Thanks for any help.

Answer 1

You need to escape the / and . literals you want to match, as you’re using the former for the regex delimiter and the . has special meaning in a regex (generally to match all chars except \n).

if(!preg_match('/^\d{2}.\d{3}\.\d{3}\/\d{4}-\d{2}$/', $string)) {
     echo 'Doesnt match the mask!';
}

I also used \d instead of [0-9] as it’s less to read and comprehend and they mean the same thing.