What potential pitfalls should be considered when using stripos in PHP?

Using stripos in PHP can lead to potential pitfalls if the search string is not found in the haystack. In such cases, stripos returns false, which can be misinterpreted as the search string being found at position 0. To avoid this issue, it is recommended to use strict comparison (===) when checking the result of stripos to differentiate between a false return value and a position of 0.

$haystack = "Hello, World!";
$needle = "foo";

$position = stripos($haystack, $needle);

if ($position !== false) {
    echo "The needle was found at position: " . $position;
} else {
    echo "The needle was not found in the haystack.";
}