php怎么清除数组的重复数据

$array = array("a","b","c","d","a","b","e");$new_array = array_unique($array);print_r($new_array);

Array(    [0] => a    [1] => b    [2] => c    [3] => d    [6] => e)

$array1 = array("a","b","c","d","a","b","e");$array2 = array("c", "d", "e", "f");$new_array = array_diff($array1, $array2);print_r($new_array);

Array(    [0] => a    [1] => b)

$array1 = array("a","b","c","d","a","b","e");$array2 = array("c", "d", "e", "f");$new_array = array_merge($array1, $array2);print_r($new_array);

Array(    [0] => a    [1] => b    [2] => c    [3] => d    [4] => a    [5] => b    [6] => e    [7] => c    [8] => d    [9] => e    [10] => f)

$array1 = array("a","b","c","d","a","b","e");$array2 = array("c", "d", "e", "f");$new_array = array_intersect($array1, $array2);print_r($new_array);

Array(    [2] => c    [3] => d    [6] => e)

$array1 = array("a","b","c","d","a","b","e");$array2 = array("c", "d", "e", "f");$new_array = array_merge(array_diff($array1, array_intersect($array1, $array2)), array_diff($array2, array_intersect($array1, $array2)));print_r($new_array);

Array(    [0] => a    [1] => b    [4] => f)

$new_array = array_unique($array1);

$new_array = array_intersect($array1, array_unique(array_reverse($array1)));