diff --git a/core/modules/php/php.module b/core/modules/php/php.module
index 37bf9a1..5fef060 100644
--- a/core/modules/php/php.module
+++ b/core/modules/php/php.module
@@ -36,7 +36,7 @@ function php_permission() {
 }
 
 /**
- * Evaluate a string of PHP code.
+ * Evaluates a string of PHP code.
  *
  * This is a wrapper around PHP's eval(). It uses output buffering to capture both
  * returned and printed text. Unlike eval(), we require code to be surrounded by
@@ -48,6 +48,7 @@ function php_permission() {
  *
  * @param $code
  *   The code to evaluate.
+ *
  * @return
  *   A string containing the printed output of the code, followed by the returned
  *   output of the code.
@@ -82,7 +83,9 @@ function php_eval($code) {
 }
 
 /**
- * Tips callback for php filter.
+ * Provides 'tips callback' for php filter.
+ *
+ * @see php_filter_info
  */
 function _php_filter_tips($filter, $format, $long = FALSE) {
   global $base_url;
@@ -137,4 +140,3 @@ function php_filter_info() {
   );
   return $filters;
 }
-