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众所周知,array_unshift()用来在数组的开头添加元素，但今天突然发现如果数组的键值是数字类型的（或能转成数字类型的），array_unshift()会修改所有键为数字的元素的Key,真是坑啊

实例:

$a=array(111=>"dddddddddddd","112"=>array("one"=>"orange","two"=>"hhhhh"), "113"=>array("one"=>"orange","two"=>"hhhhh"),"oooo"=>"jjjjj");print_r($a);echo "
";array_unshift($a, "aaaaaaaaa");print_r($a);echo "
";

输出结果:

Array ( [111] => dddddddddddd [112] => Array ( [one] => orange [two] => hhhhh ) [113] => Array ( [one] => orange [two] => hhhhh ) [oooo] => jjjjj )Array ( [0] => aaaaaaaaa [1] => dddddddddddd [2] => Array ( [one] => orange [two] => hhhhh ) [3] => Array ( [one] => orange [two] => hhhhh ) [oooo] => jjjjj )

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