PHP如何去除數(shù)組重復(fù)元素？

在PHP中可以使用“array_filter()”函數(shù)去除數(shù)組重復(fù)元素，該函數(shù)會(huì)用回調(diào)函數(shù)過濾數(shù)組中的單元，其語法是“array_filter(array) ”，其參數(shù)array表示要過濾的數(shù)組，返回值為過濾后的數(shù)組。

示例代碼

<?php function odd($var) {     // returns whether the input integer is odd     return($var & 1); } function even($var) {     // returns whether the input integer is even     return(!($var & 1)); } $array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5); $array2 = array(6, 7, 8, 9, 10, 11, 12); echo "Odd :n"; print_r(array_filter($array1, "odd")); echo "Even:n"; print_r(array_filter($array2, "even")); ?>

以上例程會(huì)輸出：

Odd :

Array (     [a] => 1     [c] => 3     [e] => 5 ) Even: Array (     [0] => 6     [2] => 8     [4] => 10     [6] => 12 )

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