Compare all value of two array in one foreach - php

Question

I've 2 array in php
$array1=array('user_id'=>'1','user_id'=>'2','user_id'=>'3');
$array2=array('invite_user_id'=>'1','invite_user_id'=>'3');
This is a result of select query wrote in codeigniter. so that is associative array. This is 2 query result one is for user list and second is for invited user list. I want check in user list which user is invited. So that I want to compare that array
foreach ($array1 as $key => $value) {
if($array2[$key]->invite_user_id==$value->user_id) {
echo "Matched";
}
}
but it compare only 2 value of array1 with array2 3rd value is not compare. How it could compare all value of array1 and array2 in above foreach loop

Answer 1

I found that answer
$array1=array('user_id'=>'1','user_id'=>'2','user_id'=>'3');
$array2=array('invite_user_id'=>'1','invite_user_id'=>'3');
$invitationset = [];
foreach ($array2 as $invite) {
$invitationset[$invite->invite_user_id] = $invite->invite_user_id;
}
foreach ($array1 as $key => $value) {
if(isset($invitationset[$value->user_id])){
if($invitationset[$value->id]==$value->user_id){
echo "Matched";
}
}
}

Answer 2

In your assoc arrays you have dublicate keys. So if you use:
print_r( $array1 );
You'll see that your array only contains the last entry:
Array ( [user_id] => 3 )
I think that is not what you have expected. So you have to use different keys like that:
$array1 = array('user_id_1'=>'1','user_id_2'=>'2','user_id_3'=>'3');
$array2 = array('invite_user_id_1'=>'1','invite_user_id_2'=>'3');
Or you even dont use assoc arrays because it is obsolete in your example but never mind:
$user_ids = array('1','2','3');
$invited_user_ids = array('1','3');
You can compare your assoc arrays like that:
$array1 = array('user_id_1'=>'1','user_id_2'=>'2','user_id_3'=>'3');
$array2 = array('invite_user_id_1'=>'1','invite_user_id_2'=>'3');
foreach ($array1 as $user_id) {
if( in_array( $user_id, $array2 ) ) {
echo "Matched id: $user_id";
}
}