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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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