We no longer need array_merge() as of PHP 7.4. [...$a, ...$b] does the same as array_merge($a, $b) and can be faster too. https://wiki.php.net/rfc/spread_operator...
2019年1月15日 $arr3=array_merge($arr1,$arr2); var_dump($arr3); // Warning: array_merge(): Argument #2 is not an array in D:\WWW\test.php on line 6 // NULL 会产生...