Find Matching entries in an array in php

Question

So I have two arrays :

1. $users_populated = users_populated: Array
(
    [0] => Array
        (
            [id] => 10000106
            [username] => 
            [name] => 
            [firstname] => 
            [initial] => 
            [surname] => 
        )

    [1] => Array
        (
            [id] => 10000106
            [username] => 
            [name] =>  
            [firstname] => 
            [initial] => 
            [surname] => 
            [email] => 
            [role] => 
            [roleids] => 
            [platform] => 
        )

    [2] => Array
        (
            [id] => 10000065
            [username] => 
            [name] =>  
            [firstname] => 
            [initial] => 
            [surname] => 
            [email] => 
        )

    [3] => Array
        (
            [id] => 296
            [username] =>
            [name] =>
            [firstname] => 
            [initial] => 
            [surname] => 
            [email] => 
                  )

    [4] => Array
        (
            [id] => 297
            [username] =>
            [name] =>
            [firstname] =>
            [initial] => 
            [surname] =>
            [email] => 
           )
        )

2. $user_list: Array
(
    [0] => 10000106
    [1] => 297
)

So I want the values from 1st array which matches the 2nd array that is Entries :

$output = output: Array
(
[0] => Array
        (
            [id] => 10000106
            [username] => 
            [name] => 
            [firstname] => 
            [initial] => 
            [surname] => 
        )
 [1] => Array
        (
            [id] => 297
            [username] =>
            [name] =>
            [firstname] =>
            [initial] => 
            [surname] =>
            [email] => 
           )

)

In Short IDs from 1st array and values in 2nd array should match

I have tried using Array intersect key but that didn't work out..

Thanks for reading.

Answer 1

By looping $users_populated and array_seach function you may obtain the expected result.

<?php

$output = array();

// Case 1: This will overlap by using the last appearance of the same ID value if repeated ID appears in $users_populated

foreach($users_populated as $value) {

    if($key = array_search($value['id'], $user_list))

        $output[$key] = $value;

}

// Case 2: This will use the first result found in $users_populated

foreach($users_populated as $value) {

    if(empty($output[$value['id']]) && $key = array_search($value['id'], $user_list))

        $output[$key] = $value;

}

var_dump($output);

Hope this is what you want.

Answer 2

Use array_uintersect():

$result = array_uintersect($one, $two, function($x, $y)
{
   $x = is_array($x)?$x['id']:$x;
   $y = is_array($y)?$y['id']:$y;
   return $x-$y;
});

-your second array is plain, thus it will act directly in callback.

Answer 3

When you want to check if two arrays contain the same values, regardless of the values' order, you cannot use "==" or "===". Try this function .

<?php
function array_equal($a, $b) {
    return (is_array($a) && is_array($b) && array_diff($a, $b) === array_diff($b, $a));
}
?>