How to compare two arrays in php to see if they have the same elements

Comparison method: 1. Use the array_intersect_assoc() function to compare the key names and key values ​​of the two arrays. The syntax "array_intersect_assoc($arr1,$arr2)" will return an intersection array containing the same elements; 2. Use the "==" operator to determine whether the intersection array is an empty array. The syntax is "intersection array == []". If the intersection array is an empty array, then there are no identical elements in the two arrays. If the intersection array is not an empty array, then the two arrays will arrays have the same elements.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

Compare two php How to check whether arrays have the same elements

Step 1: Use array_intersect_assoc() function to compare arrays

array_intersect_assoc() function is used to compare two The key name and key value of the array, and returns the intersection of the two arrays (arrays containing the same elements).

The intersection array includes all key names and key values ​​in the compared array (array1) and in any other parameter array (array2).

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
$arr1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$arr2=array("a"=>"red","b"=>"green","c"=>"yellow");
$arr3=array("a"=>"green","b"=>"1","c"=>"yellow");
var_dump($arr1);
var_dump($arr2);
var_dump($arr3);
$result=array_intersect_assoc($arr1,$arr2);
echo &#39;两个数组($arr1和$arr2)的交集：&#39;;
var_dump($result);
$result=array_intersect_assoc($arr1,$arr3);
echo &#39;两个数组($arr1和$arr3)的交集：&#39;;
var_dump($result);
?>

Step 2: Use the "==" operator to determine whether the intersection array is an empty array

• If the intersection array is an empty array, then there are no identical elements in the two arrays

• If the intersection array is not an empty array, then there are identical elements in the two arrays

if($result==[]){
	echo &#39;两个数组中没有相同元素<br>&#39;;
}else{
	echo &#39;两个数组中有相同元素<br>&#39;;
}

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of How to compare two arrays in php to see if they have the same elements. For more information, please follow other related articles on the PHP Chinese website!