array_intersect
(PHP 4 >= 4.0.1, PHP 5)
array_intersect — Computes the intersection of arrays
說明
array array_intersect
( array $array1
, array $array2
[, array $ ...
] )
array_intersect() returns an array containing all the values of array1 that are present in all the arguments. Note that keys are preserved.
參數
- array1
-
The array with master values to check.
- array2
-
An array to compare values against.
- array
-
A variable list of arrays to compare.
Return值
Returns an array containing all of the values in array1 whose values exist in all of the parameters.
範例
Example#1 array_intersect() example
<?php
$array1 = array("a" => "green", "red", "blue");
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
print_r($result);
?>
上例將輸出：
Array ( [a] => green [0] => red )
註釋
Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In words: when the string representation is the same.