.yml文件和Symfony2 / Doctrine2 - 在密码中转义特殊字符

I have a MySQL password with special chars "%" and "$". How can I use it with Symfony2/Doctrine2 and .yml files?

I try: "pa%s$s" 'pa%s$s' pa%s$s and it didn't work.

The answer is: Escaping: "%" char Use: "%%"

Example: "pa%s%s" should be: "pa%%s%%s"