Fatal error: Only variables can be passed by reference

Was able to reproduce on my machine.
Drupal 4.6.3
PHP 5.0.5
Apache 2.0.54
MySQL 4.1.8
Also line 519

I'm new to Drupal so I did not try to debug.

I had same error for Drupal system.module on line 650.
Workaround:

change

system.module:650         file_check_directory(variable_get('file_directory_path', 'files'), FILE_CREATE_DIRECTORY, 'file_directory_path');

to

system.module:650         $tmp_var_001 = variable_get('file_directory_path', 'files');
system.module:651         file_check_directory($tmp_var_001, FILE_CREATE_DIRECTORY, 'file_directory_path');

I did this every time error like this popped up (2 times by now in system.module).

It's some php bug I guess...

Regerds.

Thanks!! That seems to be the problem. Your fix is like danielc's official patch for the system.module bug. I installed it a while ago so I did not remmeber. See http://drupal.org/node/26033

I modified the theme_editor.module with the following: (line 519:)

function _theme_editor_check_dir() {
$tmp_var_ced = variable_get('theme_editor_path', 'theme_editor');
$tmp2_var_ced = file_create_path($tmp_var_ced);
if (!file_check_directory($tmp2_var_ced, FILE_CREATE_DIRECTORY)) {
return t('The theme storage directory does not exist or is not writable.');
}
}

...and everything was fixed. I tested the module and so far everything is working well. There are other instances of the file_create_path call in the module so I'm going to make further tests.

Ced

It seems that people at PHP do not think that this is PHP bug (see http://bugs.php.net/bug.php?id=33643 ). So drupal should change code in way that rasmus suggests:

function & foo() { static $a; return $a; }
function bar(&$arg) { $arg = 1; }
bar(foo());

this is different than simple but ugly fixes like:

$temp_001 =& foo();
bar(&$temp_001);

bye
boris

I was wrong. There is no way to escape ugly:

bar($temp_001=foo());

Sorry

Just for your information. Following code:

$page = array_pop( explode( '/', $HTTP_SERVER_VARS['PHP_SELF'] ));

Throws "Fatal error: Only ..." in PHP5.1.0RC1 but not in PHP5.1.0RC3 so this is porobably PHP bug.

Not sure if it has also been addressed in the node.module.

I also get that error on line 735 of node.module:

    else if (arg(0) == 'admin' && arg(1) == 'node' && arg(2) == 'configure' && arg(3) == 'types' && is_string(arg(4))) {
      $items[] = array('path' => 'admin/node/configure/types/'. arg(4),
        'title' => t("'%name' content type", array('%name' => node_invoke(<b>arg(4)</b>, 'node_name'))),
        'type' => MENU_CALLBACK);

Quick Fix I made:

    else if (arg(0) == 'admin' && arg(1) == 'node' && arg(2) == 'configure' && arg(3) == 'types' && is_string(arg(4))) {
      $items[] = array('path' => 'admin/node/configure/types/'. arg(4),
        $typeName = arg(4);
        'title' => t("'%name' content type", array('%name' => node_invoke(<b>$typeName</b>, 'node_name'))),
        'type' => MENU_CALLBACK);

I submitted a patch for theme_editor.module in http://drupal.org/node/49594