php - 比较两个数组的位置

Question

我有两个数组，

$a= array(1,2,3,4,5);
$b= array(2,1,4,4,5);

我想打印 (4,5) 因为它是两个给定数组中相同位置的元素。

Answer 1

You should be able to use array_intersect_assoc() like this:

$a = array(1,2,3,4,5);
$b = array(2,1,4,4,5);
$array = array_intersect_assoc($a, $b);
var_dump($array);

The array_intersect_assoc() function performs similarly to array_intersect(), however it adds an extra key check to validate that the keys match as well.

Answer 2

这个怎么样：

$length = count($a);
$same = array();

for($i = 0; $i < $length; $i++) {
    if($a[$i] == $b[$i]) {
        $same[] = $a[$i];
    }
}

Answer 3

$c = array();
foreach($a as $key => $val) {
    if($val == $b[$key]) {
        $c[] = $val;
    }
}

var_dump($c);

输出：

array(2) {
  [0]=>
  int(4)
  [1]=>
  int(5)
}