Answers for "php function to check if a string contains a regex pattern"

check if a string contains a substring php

$a = 'How are you?';

if (strpos($a, 'are') !== false) {
    echo 'true';
}

php check regular string

//You should use a regex filter with preg_match who returns 1 or 0

// this filter works for most of cases

/* use this regex */ preg_match("/^[a-z ,.'-]+$/i", your_string);

if you want more regex filters you can make yours on 'https://regex101.com/'