程式設計@筆記

[php]array_intersect 計算陣列值的交集

(PHP 4 >= 4.0.1, PHP 5)

官方範例：
<?php
$array1 = array("a" => "green", "red", "blue");
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
?>

這使得 $result 成為：

Array
(
    [a] => green
    [0] => red
)


其它範例：

<?php
$a = array('one', 'two', 'three', 'four', 'five', 'six', 'seven', 'height', 'nine', 'ten');
$b = array('four', 'one', 'height', 'five');
print_r(array_intersect($a, $b));
?>

Array ( [0] => one [3] => four [4] => five [7] => height )