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@ 2019-09-10T13:20:18Z

<?php
$a1 = Array
(
    '0' => Array
        (
            'src' => '/wp-content/uploads/2019/09/heythere.jpg',
            'source' => 'database'
        ),

    '1' => Array
        (
            'src' => '/wp-content/uploads/2019/09/test.jpg',
            'source' => 'database'
        )

);
$a2 = Array
(
    '0' => Array
        (
            'src' => '/wp-content/uploads/2019/09/heythere.jpg',
            'source' => 'directory'
        ),

    '1' => Array
        (
            'src' => '/wp-content/uploads/2019/09/demo.jpg',
            'source' => 'directory'
        ),

    '2' => Array
        (
            'src' => '/wp-content/uploads/2019/09/image.jpg',
            'source' => 'directory'
        )

);

$u = array_values(array_column(array_merge($a1,$a2), null, 'src'));
print_r($u);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [src] => /wp-content/uploads/2019/09/heythere.jpg [source] => directory ) [1] => Array ( [src] => /wp-content/uploads/2019/09/test.jpg [source] => database ) [2] => Array ( [src] => /wp-content/uploads/2019/09/demo.jpg [source] => directory ) [3] => Array ( [src] => /wp-content/uploads/2019/09/image.jpg [source] => directory ) )

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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