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@ 2019-06-12T11:57:45Z

<?php
$array1 = Array
(
    0 => Array
        (
            'ID' => 101,
            'Code' => 1075,
            'Date' => '2012-03-03 17:13:12.433'
        ),

    1 => Array
        (
            'ID' => 103,
            'Code' => 175,
            'Date' => '2012-09-05 20:30:02.217'
        ),

    2 => Array
        (
            'ID' => 109,
            'Code' => 178,
            'Date' => '2012-07-05 20:30:02.217'
        )

);

$array2 = Array
(
    0 => Array
        (
            'Amount' => 1234,
            'ID' => 101
        ),

    1 => Array
        (
            'Amount' => 1342,
            'ID' => 103
        ),

    2 => Array
        (
            'Amount' => 0,
            'ID' => 0
        )

);

$arr2 = array_column($array2, "ID");

$finalArray = array();
foreach($array1 as $arr){
    $key = array_search($arr['ID'], $arr2);
	if($key ===false){
		$key = array_search(0, $arr2);
	}
	unset($array2[$key]['ID']);
	$finalArray[] = 	array_merge($arr,$array2[$key]);
}

print_r($finalArray);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => Array ( [ID] => 101 [Code] => 1075 [Date] => 2012-03-03 17:13:12.433 [Amount] => 1234 ) [1] => Array ( [ID] => 103 [Code] => 175 [Date] => 2012-09-05 20:30:02.217 [Amount] => 1342 ) [2] => Array ( [ID] => 109 [Code] => 178 [Date] => 2012-07-05 20:30:02.217 [Amount] => 0 ) )

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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