Commit a841e712 authored by Dries's avatar Dries

- Patch #408882 by jhodgdon, pillarsdotnet: incorrect documentation in menu_unserialize() function.

parent eefb872c
......@@ -336,25 +336,39 @@ function menu_get_ancestors($parts) {
}
/**
* The menu system uses serialized arrays stored in the database for
* arguments. However, often these need to change according to the
* current path. This function unserializes such an array and does the
* necessary change.
*
* Integer values are mapped according to the $map parameter. For
* example, if unserialize($data) is array('view', 1) and $map is
* array('node', '12345') then 'view' will not be changed because
* it is not an integer, but 1 will as it is an integer. As $map[1]
* is '12345', 1 will be replaced with '12345'. So the result will
* be array('node_load', '12345').
*
* @param @data
* A serialized array.
* @param @map
* An array of potential replacements.
* Unserializes menu data, using a map to replace path elements.
*
* The menu system stores various path-related information (such as the 'page
* arguments' and 'access arguments' components of a menu item) in the database
* using serialized arrays, where integer values in the arrays represent
* arguments to be replaced by values from the path. This function first
* unserializes such menu information arrays, and then does the path
* replacement.
*
* The path replacement acts on each integer-valued element of the unserialized
* menu data array ($data) using a map array ($map, which is typically an array
* of path arguments) as a list of replacements. For instance, if there is an
* element of $data whose value is the number 2, then it is replaced in $data
* with $map[2]; non-integer values in $data are left alone.
*
* As an example, an unserialized $data array with elements ('node_load', 1)
* represents instructions for calling the node_load() function. Specifically,
* this instruction says to use the path component at index 1 as the input
* parameter to node_load(). If the path is 'node/123', then $map will be the
* array ('node', 123), and the returned array from this function will have
* elements ('node_load', 123), since $map[1] is 123. This return value will
* indicate specifically that node_load(123) is to be called to load the node
* whose ID is 123 for this menu item.
*
* @param $data
* A serialized array of menu data, as read from the database.
* @param $map
* A path argument array, used to replace integer values in $data; an integer
* value N in $data will be replaced by value $map[N]. Typically, the $map
* array is generated from a call to the arg() function.
*
* @return
* The $data array unserialized and mapped.
* The unserialized $data array, with path arguments replaced.
*/
function menu_unserialize($data, $map) {
if ($data = unserialize($data)) {
......
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