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@ 2014-07-28T21:53:05Z

<?php 

$myArray = array(
    "a", 
    array(
        "a",
        "b",
        array(
            "a",
            "b",
            "c",
            array(
                "a",
                "b",
                "c",
                "d",
                array("the end")
                )
            )
        )
    );

$recursive_array_iterator = new RecursiveArrayIterator($myArray);
iterator_apply($recursive_array_iterator, 'traverseRecursiveArray', new \ArrayObject($recursive_array_iterator)); 


function traverseRecursiveArray($iterator) 
{   
    while ($iterator->valid()) { 
        if ($iterator->hasChildren()) { 
            traverseRecursiveArray($iterator->getChildren()); 
        } else { 
            $iterator->offsetSet($iterator->key(), manipulate($iterator->current()));
            echo $iterator->key() . ' => ' . $iterator->current() . PHP_EOL;    
        } 


        $iterator->next(); 
    } 
}

function manipulate($string)
{
	$string .= " appended";

    return $string;
}

var_dump($myArray);

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: iterator_apply(): Argument #3 ($args) must be of type ?array, ArrayObject given in /in/656RE:24 Stack trace: #0 /in/656RE(24): iterator_apply(Object(RecursiveArrayIterator), 'traverseRecursi...', Object(ArrayObject)) #1 {main} thrown in /in/656RE on line 24
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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