How to remove duplicates from two arrays in php

php method to remove duplicate values ​​from two arrays: first create a PHP sample file; then delete duplicate values ​​through the "rray_diff($f,$e); array_diff($e,$f);" method Can.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

Use array_diff to remove duplicate values ​​from two arrays

Business scenario, get two strings $e and $f.

correspond to the previous data and the replaced data respectively, we will not change the duplicates

Delete the previous one and add the new one

The commented ones are typed out by normal logic, but I really don’t want to use a loop. It’s better to write the built-in function in low-level C and run faster

$e = 22,33,44;
$f = 22,31,54;
        $e = explode(',',$e);
        $f = explode(',',$f);
        //删除重复值
//        foreach ($f as $k1=>$v1){
//            foreach ($e as $k2=>$v2){
//                if($v1===$v2){
//                    unset($f[$k1]);unset($e[$k2]);
//                }
//            }
//        }
        $f1=array_diff($f,$e);
        $e1=array_diff($e,$f);
        print_r($e1);//33,44
print_r($f1);//31,54

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