My mistake with the strpos function? Php

Question

I'm trying to get a strposstring variable $stringfor the phrase “test” to search , and if it does not contain “test”, another variable is $changeredefined as $string2(where $changeit was defined earlier)

if (strpos($string, 'test') == false) {
  $change = $string2;
  break;
 }      

But, unfortunately, this does not work.

Is there a mistake in the above?

Thanks.

Answer 1

strpos returns false if it does not find a string that is equivalent to 0 in a nonspecific conditional expression in PHP. Be sure to use the === operator when comparing strpos usage.

if (strpos($string, 'test') === false) {
  $change = $string2;
  break;
} 

Answer 2

Try using

if (strpos($string, 'test') === false)

=== instead of ==

Answer 3

strpos "false" "0", false, == ( "" ) === ( ). :

  $change = (strpos($string, 'test') === false) ? $string2 : $change;