PHP - Testing the strpos() Return Value in PHP

Because strpos() could two types of values, Integer and Boolean, you need to be careful about testing the return value. The best way is to use the "Identical(===)" operator. Do not use the "Equal(==)" operator, because it does not differentiate "0" and "false". Check out this PHP script on how to use strpos():

<?php
$haystack = "needle234953413434516504381640386488129";
$pos = strpos($haystack, "needle");
if ($pos==false) {
  print("Not found based (==) test\n");
} else {
  print("Found based (==) test\n");
}
if ($pos===false) {
  print("Not found based (===) test\n");
} else {
  print("Found based (===) test\n");
}
?>

This script will print:

Not found based (==) test
Found based (===) test

Of course, (===) test is correct.

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2016-10-13, 266👍, 0💬