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@ 2014-12-15T16:02:43Z

<?php


function algorithm_a()
{
	$data = [
		'city' => 'Lexington',
		'name' => 'Mike Tyson',
		'occupation' => 'Hot Dog Vendor',
		'state' => 'KY',
		'address' => '1009 Nicholasville Road',
		'ZIP' => '40526'
	];

	$order = [
		'name',
		'city',
		'state'
	];

	$filtered = array_intersect_key(
		$data,
		array_flip($order)
	);

	$ordered = array_merge(
		array_flip($order),
		$filtered
	);

	return $ordered;
}

function algorithm_b()
{
	$data = [
		'city' => 'Lexington',
		'name' => 'Mike Tyson',
		'occupation' => 'Hot Dog Vendor',
		'state' => 'KY',
		'address' => '1009 Nicholasville Road',
		'ZIP' => '40526'
	];

	$order = [
		'name',
		'city',
		'state'
	];

	$result = array();
	foreach($order as $column_name) {
	    $result[$column_name] = $data[$column_name];
	}

	return $result;
}

$result = algorithm_b();
var_dump($result);

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { ["name"]=> string(10) "Mike Tyson" ["city"]=> string(9) "Lexington" ["state"]=> string(2) "KY" }

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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