#50710 [Bgs]: stripos returns FALSE for empty string used as needle

ID: 50710 User updated by: miklcct at gmail dot com Reported By: miklcct at gmail dot com Status: Bogus Bug Type: Strings related Operating System: Ubuntu 9.10 PHP Version: 5.3.1 New Comment: This is not only for stripos, it is for the whole str*pos family and the documentation specifies that "If needle is not found, str*pos() will return boolean FALSE" but the fact is the empty string can be found in any string Previous Comments: ------------------------------------------------------------------------ [2010-01-10 22:37:04] jani@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php , ------------------------------------------------------------------------ [2010-01-10 09:34:37] rasmus@php.net By that logic shouldn't it always return true then? There is an empty string everywhere in a string. Before the first char, between each char, etc. Not sure that is a useful result though. ------------------------------------------------------------------------ [2010-01-10 09:28:38] miklcct at gmail dot com Description: ------------ The function stripos() returns FALSE when a empty string is used. Consider the example below, an empty string is used and it is found at position 0. It is misleading (at least theoretically) that an empty string is not found inside another string. Reproduce code: --------------- <?php var_dump(stripos('test', 'te')); var_dump(stripos('test', 't')); var_dump(stripos('test', '')); var_dump(stripos('test', 'es', 1)); var_dump(stripos('test', 'e', 1)); var_dump(stripos('test', '', 1)); var_dump(stripos('test', '', 2)); var_dump(stripos('', '')); ?> Expected result: ---------------- int(0) int(0) int(0) int(1) int(1) int(1) int(2) int(0) Actual result: -------------- int(0) int(0) bool(false) int(1) int(1) bool(false) bool(false) bool(false) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=50710&edit=1