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@ 2013-04-24T22:41:30Z

<?php
$refs = array();

function wrap( $arr){
	// Need to clear out the global references array, I chose to do this here
	global $refs;
	$refs = array();
	test( $arr);
}

function test( $arr){
	global $refs;
	$refs[] = $arr;
    foreach( $arr as $v) {
        if( $v === $arr || in_array( $v, $refs)) { 
            print ' ref ';
        } else {
            if( is_array( $v)) {
                test( $v); 
            } else {
                print $v . ', ';
            }
        }
    }
}

echo "Array 1:\n";
$array1 = array(1, 2, 3);
$array1[4] = &$array1;
wrap( $array1);

echo "\nArray 2:\n";
$array2 = array(1, 2, 3, array(1, 2, 3));
$array2[2] = &$array2;
wrap( $array2);

echo "\nArray 3:\n";
$array3 = array(1, 2, 3, array(1, 2, 3));
$array3[3][1] = &$array3;
wrap( $array3);

Output for git.master, git.master_jit, rfc.property-hooks: Array 1: 1, 2, 3, ref Array 2: 1, 2, ref 1, 2, 3, Array 3: 1, 2, 3, 1, ref 3,

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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