Question

I have a string

8,7,13,14,16

Whats the easiest way to determine if a given number is present in that string?

$numberA = "13";
$string = "8,7,13,14,16";

if($string magic $numberA){
$result = "Yeah, that number is in there";
} else {
$result = "Sorry.";
}

Looking for magic.

Answer 1

<?php 
in_array('13', explode(',', '8,7,13,14,16'));
?>

…will return whether ’13’ is in the string.

Just to elaborate: explode turns the string into an array, splitting it at each ‘,’ in this case. Then, in_array checks if the string ’13’ is in the resulting array somewhere.