How can PHP developers efficiently find the end of a substring within a given string?

To efficiently find the end of a substring within a given string in PHP, developers can use the strpos function to find the starting position of the substring and then add the length of the substring to get the end position. This approach allows for a quick and accurate way to determine the end of the substring within the string.

$string = "Hello, World!";
$substring = "World";
$start_position = strpos($string, $substring);
$end_position = $start_position + strlen($substring);
echo "The end position of the substring is: " . $end_position;