function drupal_get_schema_versions
Same name in other branches
- 9 core/includes/schema.inc \drupal_get_schema_versions()
- 8.9.x core/includes/schema.inc \drupal_get_schema_versions()
Returns an array of available schema versions for a module.
Parameters
$module: A module name.
Return value
If the module has updates, an array of available updates sorted by version. Otherwise, FALSE.
6 calls to drupal_get_schema_versions()
- drupal_install_system in includes/
install.inc - Installs the system module.
- module_enable in includes/
module.inc - Enables or installs a given list of modules.
- system_install in modules/
system/ system.install - Implements hook_install().
- system_requirements in modules/
system/ system.install - Implements hook_requirements().
- update_get_update_function_list in includes/
update.inc - Returns an organized list of update functions for a set of modules.
1 string reference to 'drupal_get_schema_versions'
- system_install in modules/
system/ system.install - Implements hook_install().
File
-
includes/
install.inc, line 98
Code
function drupal_get_schema_versions($module) {
$updates =& drupal_static(__FUNCTION__, NULL);
if (!isset($updates[$module])) {
$updates = array();
foreach (module_list() as $loaded_module) {
$updates[$loaded_module] = array();
}
// Prepare regular expression to match all possible defined hook_update_N().
$regexp = '/^(?P<module>.+)_update_(?P<version>\\d+)$/';
$functions = get_defined_functions();
// Narrow this down to functions ending with an integer, since all
// hook_update_N() functions end this way, and there are other
// possible functions which match '_update_'. We use preg_grep() here
// instead of foreaching through all defined functions, since the loop
// through all PHP functions can take significant page execution time
// and this function is called on every administrative page via
// system_requirements().
foreach (preg_grep('/_\\d+$/', $functions['user']) as $function) {
// If this function is a module update function, add it to the list of
// module updates.
if (preg_match($regexp, $function, $matches)) {
$updates[$matches['module']][] = $matches['version'];
}
}
// Ensure that updates are applied in numerical order.
foreach ($updates as &$module_updates) {
sort($module_updates, SORT_NUMERIC);
}
}
return empty($updates[$module]) ? FALSE : $updates[$module];
}
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