php array_fill_keys用指定的键和值填充数组

参考地址   http://php.net/manual/zh/function.array-fill-keys.php

项目中遇到了一个数组作为的值作为键值，另外一个数组的值作为值来填充一个新数组的问题，

foreach 有些麻烦

array array_fill_keys ( array $keys , mixed $value )

eg：

$array1 = array("a" => "first","b" => "second","c" => "something","red");$array2 = array("a" => "first","b" => "something","letsc");print_r(array_fill_keys($array1, $array2));Array(    [first] => Array    (        [a] => first        [b] => something[0] => letsc        )    [second] => Array(    [a] => first    [b] => something[0] => letsc        )    [something] => Array(    [a] => first    [b] => something[0] => letsc        )    [red] => Array(    [a] => first    [b] => something[0] => letsc        ))