Can't make PHP function work inside HTML inside PHP

Question

I wrote this code, it gets an image from a link that varies according to where you are:

Answer 1

You are already inside the php tag. So there is no need for <?php and ?>.

Try:

echo "<img src='http://chusmix.com/Imagenes/grupos/".substr($search,1).".jpg'>";

Answer 2

Replace line

echo "<img src='http://chusmix.com/Imagenes/grupos/<?php echo substr(get_search_query(), 1); ?>.jpg'>";

with

echo "<img src='http://chusmix.com/Imagenes/grupos/" . substr(get_search_query(), 1) . ".jpg'>";