What's the most efficient test of whether a PHP string ends with another string?

Question

The standard PHP way to test whether a string $str ends with a substring $test is:

$endsWith = substr( $str, -strlen( $test ) ) ==          


        

Answer 1

Here’s a simple way to check whether one string ends with another, by giving strpos an offset right where the string should be found:

function stringEndsWith($whole, $end)
{
    return (strpos($whole, $end, strlen($whole) - strlen($end)) !== false);
}

Straightforward, and I think this’ll work in PHP 4.