Mantis - Quercus
Investigating the problem I found that Wordpress is using a function called 'wp_list_pluck' to reduce a big array of article-type definitions to a single value.
Thru some calls Wordpress passed the object $wp_post_types to this function.
This function then returns one field out of this object.
As this list is assigning a new value to one of the function parameters and returning it to the callee, I found after thre calls the original $wp_post_types was modfied/damaged.
As php is passing the object by value, this should not be possible. Under some circumstances Quercus seems to pass this object as reference.
To fix this, I changed the funtion in Wordpress to use a new variable to return the result instead of the function parameter.
Unfortunately I could not simulate the behaviour in a simple test script. But anyway I might want to have a look to understand the principle problem ...
but there must be happening more in wordpress to cause this .....
/**
* Pluck a certain field out of each object in a list
*
* @since 3.1.0
*
* @param array $list A list of objects or arrays
* @param int|string $field A field from the object to place instead of the entire object
* @return array
*/
function wp_list_pluck( $list, $field ) {
foreach ( $list as $key => $value ) {
$value = (array) $value;
$list[ $key ] = $value[ $field ];
}
return $list;
}
CHANEGED To:
function wp_list_pluck( $list, $field ) {
foreach ( $list as $key => $value ) {
$value = (array) $value;
$new_list[ $key ] = $value[ $field ];
}
return $new_list;
}
test_array_ref.php [^] (11,500 bytes) 06-16-11 08:56