[PHP知识库]PHP函数array_intersect_assoc

array_intersect_assoc通过比较数组的键和值，计算数组的交集。?

• array_intersect 比较值
• array_intersect_assoc比较键和值

/**
 * Computes the intersection of arrays with additional index check
 * @link https://php.net/manual/en/function.array-intersect-assoc.php
 * @param array $array1 <p>
 * The array with master values to check.
 * </p>
 * @param array $array2 <p>
 * An array to compare values against.
 * </p>
 * @param array $_ [optional]
 * @return array an associative array containing all the values in
 * array1 that are present in all of the arguments.
 * @meta
 */
function array_intersect_assoc(array $array1, array $array2, array $_ = null) { }

示例：

$array1 = [
    'c2' => 'ccc',
    'a1' => 'aaa',
    'b1' => 'bbb'
];

$array2 = [
    'c2' => 'ccc',
    'a2' => 'aaa',
    'b2' => 'bbb2'
];

$result = array_intersect_assoc($array1, $array2);

var_dump($result);

//结果
//array(1) {
//  'c2' =>
//  string(3) "ccc"
//}