note 80010 deleted from function.strpos by danbrown

Note Submitter: Lau ---- WARNING: The documentation says: "Use the === operator for testing the return value of this function" but it should say: "Use '!== false' or '=== false' for testing the return value of this function" Therefore to test if a needle occurst in a hastack do this: if ( strpos($haystack, $needle) !== false){ echo 'found needle in haystack!'; } Using '=== true' or '!== true' or '== true' or '== false' will all return the wrong value when the needle is found in the haystack. using ' >= 0 ' returns the wrong value when the needle is not found in the haystack. By "wrong value" I mean a value that is counter-intuitive but is never-the-less correct according to the weird way in which strpos has been coded. Why on earth didn't they just return -1 if the needle was not found? Then we could just test for >= 0 Here's a full list of the value returned: (strpos("bbb", "aaa") >= 0) returns true EXPECTED FALSE (strpos("bbb", "aaa") == true) returns false expected false (strpos("bbb", "aaa") == false) returns true expected true (strpos("bbb", "aaa") === true) returns false expected false (strpos("bbb", "aaa") === false) returns true expected true (strpos("bbb", "aaa") !== false) returns false expected false (strpos("bbb", "aaa") !== true) returns true expected true (strpos("aaa", "aaa") >= 0) returns true expected true (strpos("aaa", "aaa") == true) returns false EXPECTED TRUE (strpos("aaa", "aaa") == false) returns true EXPECTED FALSE (strpos("aaa", "aaa") === true) returns false EXPECTED TRUE (strpos("aaa", "aaa") !== false) returns true expected true (strpos("aaa", "aaa") === false) returns false expected false (strpos("aaa", "aaa") !== true) returns true EXPECTED FALSE