Req #74449 [Com]: Check string begins with function: str_begins()

Edit report at https://bugs.php.net/bug.php?id=74449&edit=1 ID: 74449 Comment by: stanislav dot eckert at vizson dot de Reported by: stanislav dot eckert at vizson dot de Summary: Check string begins with function: str_begins() Status: Duplicate Type: Feature/Change Request Package: Strings related PHP Version: Irrelevant Block user comment: N Private report: N New Comment: strncmp() is quite good too, but it still requires manually setting a length value and it does not seem to accept negative offsets (for str_end() like functionality). I understand, that this is not a truly mandatory function - it just would be nice to have it. Low priority. Your link references are perfect! I didn't see that, thank you. Should I close the report now or just leave it as is? Previous Comments: ------------------------------------------------------------------------ [2017-04-16 06:34:13] requinix@php.net See https://wiki.php.net/rfc/add_str_begin_and_end_functions and the commentary in the PR https://github.com/php/php-src/pull/2049 By the way, have you seen http://php.net/manual/en/function.strncmp.php ? ------------------------------------------------------------------------ [2017-04-15 17:41:38] stanislav dot eckert at vizson dot de Description: ------------ A quite often used code is to check if a string / binary string begins with a certain substring. Using substr() requires setting 2nd param always to 0 and 3rd param to length, which is the often set hardcoded or with strlen() / mb_strlen(). Example: substr($str, 0, 7) == "http://" // or substr($str, 0, strlen("http://")) == "http://" This can lead to errors, when user sets wrong length, mixes substr() & strlen() with their multibyte versions, etc. A shorter version could be done with strpos() and checking for position 0, but strpos() searches the entire string. RegEx has performance implications. A simple function would result in a cleaner and a more robust and readable code. Example: str_begins($str, $substr) // => true / false Its performance can also be optimized quite good, I think (compared to substr()). ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74449&edit=1