You definitely don't need to do this:
redirect("/../views/quote_template.php");
... after you have used the render() function.
EDIT:
For quote.php, you should be doing something like this (in pseudo-code):
<?php
// configuration
// if user reached page via GET (as by clicking a link or via redirect)
// else render form
// else if user reached page via POST (as by submitting a form via POST)
// validate submission
// if symbol not in $_POST, apologize
// Look up that stock
// if symbol not found, apologize
// else render quote
?>
You should look at the distribution code provided by CS50 Staff in the pset7.zip archive, and pay special attention to the parts that have comments like those in my pseudo-code above, especially the sections relating to // configuration, // if user reached page via GET, and // if user reached page via POST.
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