如何在wordpress帖子中的文本中使用php变量

Question

I have a file with urls to websites:

$var1 = www.google1.com/asdfsd
$var2 = www.google2.com/fdfff

And now I want to use these variables in text in posts, for example:

any text <a href="<?php $var1 ?>">my sample link</a>

I cannot use wordpress plugins to insert php in post. How can I include file with my variables to wordpress and then use these variables in text ?