PHP uses array_intersect() function to find the intersection of two arrays

The array_intersect() function is a built-in function provided by PHP that returns the common (intersected) elements of two arrays. The following article will introduce you to the array_intersect() function and introduce how to use the array_intersect() function to find the intersection of two arrays. I hope it will be helpful to you.

php array_intersect() function

array_intersect() function is used to compare two (or more Key values ​​of multiple) arrays and return the intersection. [Recommended related video tutorials: PHP Tutorial]

Basic sentence structure:

array_intersect（$ array1，$ array2）

Return value: Return an array , which contains all values ​​of array1 present in array2.

Note: Since the array_intersect() function returns an array with reserved keys, we also need to use array_values() to reorder the keys.

Code Example

Let’s use a simple example to introduce the method of array_intersect() function array_values() to find the intersection of two arrays

<?php 
$array1 = array(2, 5, 7, 6, 9); 
$array2 = array(3, 2, 5, 6, 8); 
  
// 查找两个数组的交集
$result = array_intersect($array1, $array2); 
  
// 重新排序
$result = array_values($result); 
  
// 输出
var_dump($result); 
?>

Output:

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