1 files changed, 22 insertions, 0 deletions
diff --git a/modules/system/system.api.php b/modules/system/system.api.php
index 5f50c30d2..6ec40db01 100644
--- a/modules/system/system.api.php
+++ b/modules/system/system.api.php
@@ -2160,5 +2160,27 @@ function hook_profile_tasks() {
 }
 
 /**
+ * Alter MIME type mappings used to determine MIME type from a file extension.
+ *
+ * This hook is run when file_mimetype_mapping() is called. It is used to
+ * allow modules to add to or modify the default mapping from
+ * file_default_mimetype_mapping().
+ *
+ * @param $mapping
+ *   An array of mimetypes correlated to the extensions that relate to them.
+ *   The array has 'mimetypes' and 'extensions' elements, each of which is an
+ *   array.
+ * @see file_default_mimetype_mapping()
+ */
+function hook_file_mimetype_mapping_alter(&$mapping) {
+  // Add new MIME type 'drupal/info'.
+  $mapping['mimetypes']['example_info'] = 'drupal/info';
+  // Add new extension '.info' and map it to the 'drupal/info' MIME type.
+  $mapping['extensions']['info'] = 'example_info';
+  // Override existing extension mapping for '.ogg' files.
+  $mapping['extensions']['ogg'] = 189;
+}
+
+/**
  * @} End of "addtogroup hooks".
  */