ID: 12367
Updated by: venaas
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: Arrays related
Operating System: Linux Red hat 7.1 fr
PHP Version: 4.0.6
New Comment:
When I wrote array_diff I didn't think of this use. It
worked by accident. array_diff was changed to avoid
some ordering problems. The way it was there was no well
defined ordering. Due to automatic type conversion, you
you would have 3d < 99 < 370 < 3d. This made
array_diff fail, this was fixed by always using string
comparisons. That doesn't work for arrays though.
I'm not sure how you would like array_diff on arrays
of arrays work, and I don't plan to fix it. Maybe some-
one wants to, but first of all it must be clear how it
should work.
Could a work around for you be to serialize the arrays?
If $a is an array of arrays, you could perhaps do say
$a[0] = serialize($a[0]); $a[1] = serialize($a[1])...
and so on. One internal PHP solution could perhaps be
to serialize an array when comparing with scalars. Not
sure if I like it myself.
Previous Comments:
------------------------------------------------------------------------
[2001-07-25 11:36:08] [EMAIL PROTECTED]
Example of script
<?
echo "<html><body>\r\n";
echo "<h1>Simple array : it works</h1>\r\n<pre>\r\n";
$array1 = array('a1' => 'toto', 'b1' => 'titi', 'b2' => 'tutu', 'b3' => 'rien', 'c1'
=> 'zone');
$array2 = array('a2' => 'adeux', 'b5' => 'titi');
var_dump(array_diff($array1, $array2));
echo "\r\n</pre>\r\n<hr>\r\n<h1>Array of array : it doesn't work</h1>\r\n<pre>\r\n";
$array1 = array(
array('a1' => 'toto', 'b1' => 'titi', 'b2' => 'tutu', 'b3' => 'rien', 'c1' =>
'zone'),
array('a2' => 'adeux', 'b5' => 'titi'),
array('a8' => 'ahuit', 'b12' => 'avion')
);
$array2 = array(
array('a2' => 'adeux', 'b5' => 'titi'),
array('a7' => 'asept', 'c5' => 'camion')
);
var_dump(array_diff($array1, $array2));
echo "\r\n</pre></body></html>\r\n";
?>
Command line
'./configure' '--with-apache=../apache' '--with-zlib' '--with-bzip2'
'--enable-calendar' '--with-cybermut=../cybermut' '--enable-ftp' '--with-gd=../gd'
'--with-pgsql=/usr/local/psql' '--with-mysql' '--with-sablot' '--with-xml'
Comment
I use array_diff with array of array comming from database since version 4.0.1 without
any trouble. We just migrate to version 4.0.6 tree days ago with apache 1.3.20.
Congratulation for PHP. I love it :o)
------------------------------------------------------------------------
Edit this bug report at http://bugs.php.net/?id=12367&edit=1
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