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I think you should read some starter tutorials like the one on PHP.net, this will teach you about how the PHP engine works and show you how to escape strings.
As a bit of a hint: you need to escape the echo'd string and call the function. You are trying to initiate a block of PHP code when you're already inside it, you can read more about strings on the php.net site - link. Although the link I gave is quite detailed youcan find what you're after just inside the examples halfway down the page. I do suggest the PHP.net tutorial first though.