How to match key value in two arrays in php [duplicate] - php

Question

This question already has answers here:
Find intersecting rows between two 2d arrays comparing differently keyed columns
(3 answers)
Closed 4 months ago.
I have two arrays
Array
(
[0] => Array
(
[id] => 1
[affiliate_id] => 190
)
[1] => Array
(
[id] => 2
[affiliate_id] => 946
)
)
Array
(
[0] => Array
(
[id] => 1
[user_id] => 190
)
[1] => Array
(
[id] => 2
[user_id] => 246
)
[2] => Array
(
[id] => 3
[user_id] => 249
)
[3] => Array
(
[id] => 3
[user_id] => 250
)
)
Now i want to get an array which has value like this
if affiliate_id of first array exists in second array as user_id then i will get its value in third array like
Array
(
[0] => Array
(
[affiliate_id] => 190
)
)
i just want affiliate_id which is exists in second array as user_id

Answer 1

$a = Array(
Array('id' => 1, 'affiliate_id' => 190),
Array('id' => 2, 'affiliate_id' => 946)
);
$b = Array(
Array('id' => 1, 'user_id' => 190),
Array('id' => 2, 'user_id' => 246),
Array('id' => 3, 'user_id' => 249),
Array('id' => 3, 'user_id' => 250)
);
$c = array_map(function ($arr) { return $arr['affiliate_id']; }, $a);
$d = array_map(function ($arr) { return $arr['user_id']; }, $b);
$e = array_intersect($c, $d);
print_r($e);

Answer 2

try in_array() with loop
$a = firstarray;
$b = second array;
$i =0;
foreach($b as $k=>$v) {
if(!empty($a[$i])) {
if(in_array($v['user_id'], $a[$i])) {
$c[]['affiliate_id'] = $v['user_id'];
}
}
$i++;
}
print_r($c);
output :-
Array
(
[0] => Array
(
[affiliate_id] => 190
)
)

Answer 3

Use the following code:
<?php
$arr1 = array(array('id' => 1, 'affiliate_id' => 190),
array('id' => 2, 'affiliate_id' => 946));
$arr2 = array(array('id' => 1, 'user_id' => 190),
array('id' => 2, 'user_id' => 246),
array('id' => 3, 'user_id' => 249),
array('id' => 4, 'user_id' => 250));
$count = 0;
foreach ($arr1 as $k1 => $v1) {
if (in_array($v1['affiliate_id'], $arr2[$count]))
{
$arr3[]['affiliate_id'] = $v1['affiliate_id'];
}
$count++;
}
echo '<pre>'; print_r($arr3);
Output
Array
(
[0] => Array
(
[affiliate_id] => 190
)
)