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php - Edit the link to accept the id of category and the number of page

I use below link to open the category

 onclick="location.href = 'categories/topics_categories.php?id=13';"

and i use below link to make paging to my pages

for ($i=1; $i<=$total_pages; $i++) {
  echo "<a  href='topics_categories.php?page=".$i."'>".$i."</a> ";
        }

I want edit the link to accept the id of category and the number of pages , any ideas ?

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You can add multiple parameters to the url query string with an ampersand sign (&), only the first field name has to be prefixed with a question mark (?):

In your case

topics_categories.php?id=13&page=1

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