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@ 2013-08-05T11:20:16Z

<?php

class Arr
{
	
	public static function flatten( $array )
	{
		$flat = array();
		
		foreach ( $array as $key => $value )
		{
			if ( is_array( $value ) )
			{
				$flat += Arr::flatten( $value );
			}
			else
			{
				$flat[ $key ] = $value;
			}
		}
		
		return $flat;
	}
}

$sample = array(
	'pictures' => array(
		'name' => array(
			1 =>  array(
				1 => 'Chrysanthemum.jpg',
				2 => 'Desert.jpg',
			),
			2 => array(
				1 => '',
			),
			3 => array(
              1 => '',
              2 => 'Hydrangeas.jpg',
			),
		),
		'type' => array(
			1 => array(
				1 => 'image/jpeg',
				2 => 'image/jpeg',
			),
			2 => array(
				1 => '',
			),
			3 => array(
				1 => '',
				2 => 'image/jpeg',
			),
		),
		'tmp_name' => array(
			1 => array(
				1 => '/tmp/phpOhzhBd',
				2 => '/tmp/phpzFrNjP',
			),
			2 => array(
				1 => '',
			),
			3 => array(
				1 => '',
				2 => '/tmp/phpR6hO2q',
			),
		),
		'error' => array(
			1 => array(
				1 => 0,
				2 => 0,
			),
			2 => array(
				1 => 4,
			),
			3 => array(
				1 => 4,
				2 => 0,
			),
		),
		'size' => array(
			1 => array(
				1 => 879394,
				2 => 845941,
			),
			2 => array(
				1 => 0,
			),
			3 => array(
				1 => 0,
				2 => 595284,
			),
		),
	)
);

echo '<pre>';
var_dump( $sample );
echo '</pre>';

echo '<pre>';
var_dump( Arr::flatten( $sample ) );
echo '</pre>';

Output for git.master_jit, git.master, rfc.property-hooks: <pre>array(1) { ["pictures"]=> array(5) { ["name"]=> array(3) { [1]=> array(2) { [1]=> string(17) "Chrysanthemum.jpg" [2]=> string(10) "Desert.jpg" } [2]=> array(1) { [1]=> string(0) "" } [3]=> array(2) { [1]=> string(0) "" [2]=> string(14) "Hydrangeas.jpg" } } ["type"]=> array(3) { [1]=> array(2) { [1]=> string(10) "image/jpeg" [2]=> string(10) "image/jpeg" } [2]=> array(1) { [1]=> string(0) "" } [3]=> array(2) { [1]=> string(0) "" [2]=> string(10) "image/jpeg" } } ["tmp_name"]=> array(3) { [1]=> array(2) { [1]=> string(14) "/tmp/phpOhzhBd" [2]=> string(14) "/tmp/phpzFrNjP" } [2]=> array(1) { [1]=> string(0) "" } [3]=> array(2) { [1]=> string(0) "" [2]=> string(14) "/tmp/phpR6hO2q" } } ["error"]=> array(3) { [1]=> array(2) { [1]=> int(0) [2]=> int(0) } [2]=> array(1) { [1]=> int(4) } [3]=> array(2) { [1]=> int(4) [2]=> int(0) } } ["size"]=> array(3) { [1]=> array(2) { [1]=> int(879394) [2]=> int(845941) } [2]=> array(1) { [1]=> int(0) } [3]=> array(2) { [1]=> int(0) [2]=> int(595284) } } } } </pre><pre>array(2) { [1]=> string(17) "Chrysanthemum.jpg" [2]=> string(10) "Desert.jpg" } </pre>

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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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