PHP：具有单引号和双引号的复杂字符串

Question

I'm trying to pass GET variables inside the URL with a bit of html inside of my PHP but can't figure out the quotes situation. I need to embed two variables inside the URL. I have one in but don't know how to embed the other. Here is the string:

echo "<a href='?id=".($id-1)."' class='button'>PREVIOUS</a>";

and here is what I need to go inside

&City=$City

Thanks for the help

Answer 1

Its pretty simple,

echo "<a href='?id=".($id-1)."&city=" . $City . "' class='button'>PREVIOUS</a>";