Php code in laravel blade php

I m trying to add <?php echo $_GET["tname"] ?> in my laravel login form to use it as this http://ift.tt/2znJD6c to get it auto-filled value, but when ever i try to add it it says

Whoops, looks like something went wrong.

Can anyone tell me how to use that code in it.
Here's my laravel login page code:

<form class="" role="form" method="POST" action="">
    <div class="panel panel-body">
        <h4 class="text-semibold mt-0"></h4>

        <div class="form-group has-feedback has-feedback-left">
            <input id="email" type="email" class="form-control" name="email" placeholder=""
                 value="<?php echo $_GET["tname"]; ?>"
            >

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