note 124985 added to function.array-search

It's really important to check the return value is not false! I used array_search() to determine the index of an value to unset this value and then realized that $arr[false] === $arr[0] ! <?php $arr = ['apple', 'banana']; var_dump($arr[0] === 'apple'); // true var_dump($arr[false] === $arr[0]); // true var_dump($arr[false] === 'apple'); // true unset($arr[array_search('banana', $arr)]); //index = 1 var_dump($arr); // result // array(1) { // [0]=> // string(5) "apple" // } unset($arr[array_search('peach', $arr)]); //not found, result is false var_dump($arr); // result // array(0) { // } // because $arr[false] === $arr[0] ?> So always check the return of array_search! ---- Server IP: 45.112.84.4 Probable Submitter: 185.85.3.195 (proxied: 62.96.28.222) ---- Manual Page -- http://php.net/manual/en/function.array-search.php Edit -- https://master.php.net/note/edit/124985 Del: integrated -- https://master.php.net/note/delete/124985/integrated Del: useless -- https://master.php.net/note/delete/124985/useless Del: bad code -- https://master.php.net/note/delete/124985/bad+code Del: spam -- https://master.php.net/note/delete/124985/spam Del: non-english -- https://master.php.net/note/delete/124985/non-english Del: in docs -- https://master.php.net/note/delete/124985/in+docs Del: other reasons-- https://master.php.net/note/delete/124985 Reject -- https://master.php.net/note/reject/124985 Search -- https://master.php.net/manage/user-notes.php