How to send multiple values in a href link in PHP?

Question

I want to send multiple values to a different page using a href link. But what I retrieve is the first 2 values only, rest shows an error of undefined index.

Answer 1

You must HTML-escape those ampersands properly:

?coice=search&cat=...&subcat=...&srch=...

&sub (of &subcat) gets interpreted as ⊂ which is a special HTML entity for the subset operator:

⊂ or ⊂ = subset of ⊂

Also make sure you properly escape your variables to prevent XSS.

Answer 2

try using urlencode, as if there are any special characters in the strings, it could have an effect on the querystring as a whole;

echo "<a href='index.php?choice=search&cat=".urlencode($cat)."&subcat=".urlencode($subcat)."&srch=".urlencode($srch)."&page=".urlencode($next)."'> Next </a>";

Plus you had a space between srch and page, that could have been causing a problem.