What are the advantages and disadvantages of using strripos versus other methods for cutting off a string in PHP?

When cutting off a string in PHP, using strrpos can be advantageous as it allows you to find the position of the last occurrence of a substring within a string. This can be useful when you want to cut off a portion of a string from a specific point. However, strrpos may not be the most efficient method for cutting off a string, as it requires searching the entire string for the last occurrence of the substring.

$string = "Hello, World!";
$substring = ",";
$pos = strrpos($string, $substring);

if ($pos !== false) {
    $newString = substr($string, 0, $pos);
    echo $newString; // Output: Hello
}