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@ 2019-11-26T20:58:57Z

<?php

$records = array(
    array(
        'id' => 2135,
        'first_name' => 'John',
        'last_name' => 'Doe',
    ),
    array(
        'id' => 3245,
        'first_name' => 'Sally',
        'last_name' => 'Smith',
    ),
    array(
        'id' => 5342,
        'first_name' => 'Jane',
        'last_name' => 'Jones',
    ),
    array(
        'id' => 5623,
        'first_name' => 'Peter',
        'last_name' => 'Doe',
    )
);

$records2 = array(
    array(
        'id' => 2135,
        'first_name' => 'John',
        'last_name' => 'Doe',
    ),
    array(
        'id' => 3245,
        'first_name' => 'Sally',
        'last_name' => 'Smith',
    ),
    array(
        'id' => 5342,
        'first_name' => 'Jane',
        'last_name' => 'Jones',
    ),
    array(
        'id' => 5624,
        'first_name' => 'Peter',
        'last_name' => 'Doe',
    )
);
 
$first = array_column($records, null, 'id');
$second = array_column($records2, null, 'id');
$third = $first + $second;
// if you need to reset indexes
// $third = array_values($third);
echo print_r($third);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [2135] => Array ( [id] => 2135 [first_name] => John [last_name] => Doe ) [3245] => Array ( [id] => 3245 [first_name] => Sally [last_name] => Smith ) [5342] => Array ( [id] => 5342 [first_name] => Jane [last_name] => Jones ) [5623] => Array ( [id] => 5623 [first_name] => Peter [last_name] => Doe ) [5624] => Array ( [id] => 5624 [first_name] => Peter [last_name] => Doe ) ) 1

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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