Pop the last x bytes of a string off the string and return it. Any classic way to do it in PHP other than a custom function like this?
function string_pop(&$str, $num) {
$pop = substr($str, - $num);
$str = substr($str, 0, strlen($str) - $num);
return $pop;
}
Maybe something like
list($str, $pop) = str_split($str, strlen($str) - $num);
EDIT: As pointed out by Gergo Erdosi, this code will only work if the $num is less than half of the length of $str. The following would work otherwise.
$arr = str_split($str, strlen($str) - $num);
$pop = array_pop($arr);
$str = implode('', $arr);
But whether or not this is more elegant than you're original function is debatable.
$str = 'Lorem ipsum dolor sit amet.'; $num = 20;.
Not sure it's the most efficient, but here is a one liner:
list($str, $pop) = preg_split('/(?<=.{'.(strlen($str) - $num).'})/', $str, 2);
