/**
* Find the position of the Xth occurrence of a substring in a string
* @param $haystack
* @param $needle
* @param $number integer > 0
* @return int
*/
function strposX($haystack, $needle, $number)
{
if ($number == '1') {
return strpos($haystack, $needle);
} elseif ($number > '1') {
return strpos($haystack, $needle, mslib_befe::strposX($haystack, $needle, $number - 1) + strlen($needle));
} else {
return error_log('Error: Value for parameter $number is out of range');
}
}
