包罗万象--好东西要收藏--共享无限

方案一
$arr = array("0a","1b","2c","3d","4e","5f","6g","0a","2c","4e","6g","6g");
$arr1 = array_flip($arr);
$arr2 = array_flip($arr1);
print_r($arr2);
方案二
$arr = array("0a","1b","2c","3d","4e","5f","6g","0a","2c","4e","6g","6g");
$a = array_count_values($arr);
$b = array_keys($a);
print_r($b);
方案三
$arr = array("0a","1b","2c","3d","4e","5f","6g","0a","2c","4e","6g","6g");
foreach($arr as $k=>$v){
$arr1[$v] = $k;
$arr2 = array_flip($arr1);
}
print_r($arr2);
方案四
$arr = array("0a","1b","2c","3d","4e","5f","6g","0a","2c","4e","6g","6g");
$arr1 = array_unique($arr);
print_r($arr1);

都是刚刚我实验出来的  都可以封装起来用递归实现多维去掉重复项