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I am using Johncms 4.4 , and I want to show current page url in my site .
Problem is , I tried with the following code

$url="http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
echo '<a href="'.$url.'">Page url</a>';

But it gives error

"This page contains the following errors:

error on line 49 at column 360: EntityRef: expecting ';'
Below is a rendering of the page up to the first error.
"

what to do ?