trying to get input value from user to add on a href link

I am Trying to submit a ID number like page ID “82871” or any page ID number
and will add this ID to the href link

example i have set the href link **http://localhost/**
add the id will need look like this **http://localhost/####**

input ID number > add to the href link > and push the button to go to the site

i have try this code but it is not working :

echo ‘<form action=”localhost/ilan” >’;
echo ‘<input name=”fname” type=”” class=”textfield” id=””]’
echo ‘<button type=”submit”>Button</button>’; echo ‘</form>’;

the code add the “?fname” between the link and ID like :

http://localhost/?fname=12345

but i need just the ID added to the url like : http://localhost/12345

thanks

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