note 86407 modified in function.is-array by danbrown

alex frase's example is fast but elanthis at awesomeplay dot com's example is faster and Ilgar's modification of alex's code is faulty (the part " || $_array[$k] !== $v"). Also, Ilgar's suggestion of giving a false return value when the variable isnt an array is not suitable in my opinion and i think checking if the array is empty would also be a suitable check before the rest of the code runs. So here's the modified (is_vector) version <?php function is_vector( &$array ) { if ( !is_array($array) || empty($array) ) { return -1; } $next = 0; foreach ( $array as $k => $v ) { if ( $k !== $next ) return true; $next++; } return false; } ?> and the modified (alex's is_assoc) version <?php function is_assoc($_array) { if ( !is_array($_array) || empty($array) ) { return -1; } foreach (array_keys($_array) as $k => $v) { if ($k !== $v) { return true; } } return false; } ?> --was-- alex frase's example is fast but elanthis at awesomeplay dot com's example is faster and Ilgar's modification of alex's code is faulty (the part " || $_array[$k] !== $v"). Also, Ilgar's suggestion of giving a false return value when the variable isnt an array is not suitable in my opinion and i think checking if the array is empty would also be a suitable check before the rest of the code runs. So here's the modified (is_vector) version function is_assoc( &$array ) { if ( !is_array($array) || empty($array) ) { return -1; } $next = 0; foreach ( $array as $k => $v ) { if ( $k !== $next ) return true; $next++; } return false; } and the modified (alex's is_assoc) version function is_assoc($_array) { if ( !is_array($_array) || empty($array) ) { return -1; } foreach (array_keys($_array) as $k => $v) { if ($k !== $v) { return true; } } return false; } http://php.net/manual/en/function.is-array.php