note 108563 added to function.strcmp

If you rely on strcmp for safe string comparisons, both parameters must be strings, the result is otherwise extremely unpredictable. For instance you may get an unexpected 0, or return values of NULL, -2, 2, 3 and -3. strcmp("5", 5) => 0 strcmp("15", 0xf) => 0 strcmp(61529519452809720693702583126814, 61529519452809720000000000000000) => 0 strcmp(NULL, false) => 0 strcmp(NULL, "") => 0 strcmp(NULL, 0) => -1 strcmp(false, -1) => -2 strcmp("15", NULL) => 2 strcmp(NULL, "foo") => -3 strcmp("foo", NULL) => 3 strcmp("foo", false) => 3 strcmp("foo", 0) => 1 strcmp("foo", 5) => 1 strcmp("foo", array()) => NULL + PHP Warning strcmp("foo", new stdClass) => NULL + PHP Warning strcmp(function(){}, "") => NULL + PHP Warning ---- Server IP: 69.147.83.197 Probable Submitter: 86.135.162.90 ---- Manual Page -- http://www.php.net/manual/en/function.strcmp.php Edit -- https://master.php.net/note/edit/108563 Del: integrated -- https://master.php.net/note/delete/108563/integrated Del: useless -- https://master.php.net/note/delete/108563/useless Del: bad code -- https://master.php.net/note/delete/108563/bad+code Del: spam -- https://master.php.net/note/delete/108563/spam Del: non-english -- https://master.php.net/note/delete/108563/non-english Del: in docs -- https://master.php.net/note/delete/108563/in+docs Del: other reasons-- https://master.php.net/note/delete/108563 Reject -- https://master.php.net/note/reject/108563 Search -- https://master.php.net/manage/user-notes.php