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Bug #20381 array_merge_recursive mangles input arrays
Submitted: 2002-11-11 23:04 UTC Modified: 2002-11-15 07:38 UTC
From: mailfrom-bugs dot php dot net at kopka dot net Assigned:
Status: Closed Package: Arrays related
PHP Version: 4.3.0-dev OS: SuSE Linux 7.3
Private report: No CVE-ID: None
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 [2002-11-11 23:04 UTC] mailfrom-bugs dot php dot net at kopka dot net 
Similar to #14990 (exept that the demo code there runs fine) and the first source array gets mangled.

 Example
=========
<pre><?

$a = array(
	'a1' => 1,
	'a2' => array( 1, 2, 3 ),
	'a3' => array(
		'a' => array( 10, 20, 30 ),
		'b' => 'b'
		)
	);
$b = array( 'a1' => 2,
	'a2' => array( 3, 4, 5 ),
	'a3' => array(
		'c' => 'cc',
		'a' => array( 10, 40 )
		)
	);

$c['result'] = array_merge_recursive( $a, $b );
$c['a'] = $a;
$c['b'] = $b;

print_r( $c );

?>


 Example Output
================
Array
(
    [result] => Array
        (
            [a1] => Array
                (
                    [0] => 1
                    [1] => 2
                )

            [a2] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => 3
                    [3] => 3
                    [4] => 4
                    [5] => 5
                )

            [a3] => Array
                (
                    [a] => Array
                        (
                            [0] => 10
                            [1] => 20
                            [2] => 30
                            [3] => 10
                            [4] => 40
                        )

                    [b] => b
                    [c] => cc
                )

        )

    [a] => Array
        (
            [a1] => 1
            [a2] => Array
                (
                    [0] => 1
                    [1] => 2
                    [2] => 3
                    [3] => 3
                    [4] => 4
                    [5] => 5
                )

            [a3] => Array
                (
                    [a] => Array
                        (
                            [0] => 10
                            [1] => 20
                            [2] => 30
                            [3] => 10
                            [4] => 40
                        )

                    [b] => b
                    [c] => cc
                )

        )

    [b] => Array
        (
            [a1] => 2
            [a2] => Array
                (
                    [0] => 3
                    [1] => 4
                    [2] => 5
                )

            [a3] => Array
                (
                    [c] => cc
                    [a] => Array
                        (
                            [0] => 10
                            [1] => 40
                        )

                )

        )

)

Patches

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2002-11-12 06:33 UTC] sniper@php.net 
Reproduced using latest CVS. The original arrays are fine, but when they're added to the resulting array, then they get mangled.
 [2002-11-12 07:16 UTC] mailfrom-bugs dot php dot net at kopka dot net 
In 4.3.2 the source arrays are mangled even when you don't add them to the result.

This was just for a nicer, smaller example.

Example
========

// Same $a and $b as before

$result = array_merge_recursive( $a, $b );
print_r( $c );
print_r( $a );
print_r( $b );

// have sadly the same effect
 [2002-11-12 07:22 UTC] sniper@php.net 
They're actually mangled with CVS HEAD too..somehow I missed that or had those print_r() lines in wrong place. :I
 [2002-11-15 07:38 UTC] moriyoshi@php.net 
This bug has been fixed in CVS.

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