add $withValues param for getSql() method

Author: co0lc0der

src/QueryBuilder.php

@@ -53,14 +53,15 @@ public function addSemicolon(string $sql = ''): string
 		return $new_sql;
 	}
 
-	/**
-	 * @return string
-	 */
-	public function getSql(): string
+    /**
+     * @param bool $withValues
+     * @return string
+     */
+	public function getSql(bool $withValues = true): string
 	{
 		$sql = $this->sql;
 
-		if (!empty($this->params)) {
+		if (!empty($this->params) && $withValues) {
 			foreach ($this->params as $param) {
 				if (is_string($param)) {
 					$sql = str_replace('?', "'{$param}'", $sql);