Small performance check for downgrading utf8mb4 (#12847)

joomla · Jun 30, 2019 · 631d862 · 631d862
1 parent f527b14
commit 631d862
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/libraries/joomla/database/driver.php b/libraries/joomla/database/driver.php
@@ -897,6 +897,12 @@ public function convertUtf8mb4QueryToUtf8($query)
 			return $query;
 		}
 
+		// Don't do preg replacement if string does not exist
+		if (stripos($query, 'utf8mb4') === false)
+		{
+			return $query;
+		}
+
 		// Replace utf8mb4 with utf8 if not within single or double quotes or name quotes
 		return preg_replace('/[`"\'][^`"\']*[`"\'](*SKIP)(*FAIL)|utf8mb4/i', 'utf8', $query);
 	}