Add escapeLikeParameter to IDBConnection

lib/private/appframework/db/db.php

@@ -258,4 +258,13 @@ class Db implements IDb {
 		return $this->connection->tableExists($table);
 	}
 
+	/**
+	 * Espace a parameter to be used in a LIKE query
+	 *
+	 * @param string $param
+	 * @return string
+	 */
+	public function escapeLikeParameter($param) {
+		return $this->connection->escapeLikeParameter($param);
+	}
 }

lib/private/db/connection.php

@@ -301,4 +301,14 @@ class Connection extends \Doctrine\DBAL\Connection implements IDBConnection {
 	public function inTransaction() {
 		return $this->getTransactionNestingLevel() > 0;
 	}
+
+	/**
+	 * Espace a parameter to be used in a LIKE query
+	 *
+	 * @param string $param
+	 * @return string
+	 */
+	public function escapeLikeParameter($param) {
+		return addcslashes($param, '\\_%');
+	}
 }

lib/public/idbconnection.php

@@ -206,4 +206,13 @@ interface IDBConnection {
 	 * @since 8.0.0
 	 */
 	public function tableExists($table);
+
+	/**
+	 * Escape a parameter to be used in a LIKE query
+	 *
+	 * @param string $param
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function escapeLikeParameter($param);
 }