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array("a","b","c","d") 怎样在b,c的中间插入一个值,并且c,d对应的键值自加1;
array("a","b","c","d")
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<?php // http://3v4l.org/KWaTf $arr = array("a","b","c","d"); array_splice($arr, 2, 0, "1"); print_r($arr);
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