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@ 2013-04-19T08:31:01Z

<?php
	function append(array $init, array $add, $key = null, $initialKeyExist = true)
        {
            $_init = $init;
            	if (is_null($key)) {
                	foreach ($add as $key => $value)
						$_init[$key] = $value;
					return array_merge($_init, $init);
            	} else {
                    if ($initialKeyExist) {
                		$_init[$key] = $add;
						return [
                    		$key => array_merge($_init[$key], $init[$key])
                		];
					} else {
						$init[$key] = array();
                        $_init[$key] = $add;
						return [
                    		$key => array_merge($_init, $init)
                		];
                    }
            	}
        }

$a = [
	'phone' => [
		'code' => '+38',
    ],
];
$b = [
    'prefix' => '095',
    'number' => '7700418',
];
var_dump(append($a, $b, 'phone'));


$a = [
    'code' => '+38',
];
$b = [
    'prefix' => '095',
    'number' => '7700418',
];
var_dump(append($a, $b));


$a = [
	'phone' => [
		'code' => '+38',
    ],
];
$b = [
    'prefix' => '095',
    'number' => '7700418',
];
var_dump(append($a, $b, 'full'));

Output for git.master, git.master_jit, rfc.property-hooks: array(1) { ["phone"]=> array(3) { ["prefix"]=> string(3) "095" ["number"]=> string(7) "7700418" ["code"]=> string(3) "+38" } } array(3) { ["code"]=> string(3) "+38" ["prefix"]=> string(3) "095" ["number"]=> string(7) "7700418" } Warning: Undefined array key "full" in /in/7Kt44 on line 13 Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /in/7Kt44:13 Stack trace: #0 /in/7Kt44(13): array_merge(Array, NULL) #1 /in/7Kt44(56): append(Array, Array, 'full') #2 {main} thrown in /in/7Kt44 on line 13
Process exited with code 255.

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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