How to delete the same data in two arrays in php

php method to delete the same data in two arrays: first create a PHP sample file; then define two arrays with the same elements; then determine the same elements in the two arrays by traversing; finally, unset The function deletes elements with the same value.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

PHP deletes the same elements in two arrays

<?php
$invite1 = &#39;18,19,20,21,22&#39;;
$invite2 = &#39;18,19&#39;;
$a = explode(",",$invite1);
$b = explode(",",$invite2);
foreach ($a as $key=>$v1) {
foreach($b as $key2=>$v2){
if($v1==$v2){
unset($a[$key]);//删除$a数组同值元素
unset($b[$key2]);//删除$b数组同值元素
}
}
}
var_dump($a);
var_dump($b);
?>

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