Help getting argument from url

[SennNathan]

Im not sure why this isnt working i if i go to website.co/wolfram.php?keyword=something it should work but it dont not sure what im missing here

<?php

error_reporting(E_ALL);
ini_set('display_errors',E_ALL);
$wolfram = isset($_GET['keyword']) && is_string($_GET['keyword']) ? trim($_GET['keyword']) : '';
$request = 'http://api.wolframalpha.com/v2/query?appid=YKAERX-QJJAE7kj2G6&input=.'$wolfram'.&format=html';
echo $wolfram;
echo "text";
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_URL, $request);
$response = curl_exec($curl);
curl_close($curl);

$blank = '';
$divwolf ='</div>';
$remove = ']]>';
$remove2 = '</div></div>';  
$displaywolf = str_replace($remove, $blank, $response);
echo $displaywolf;

?>

[objnoob]

Your error is here:  

$request = 'http://api.wolframalpha.com/v2/query?appid=YKAERX-QJJAE7kj2G6&input=.'$wolfram'.&format=html';

The correction:

$request = 'http://api.wolframalpha.com/v2/query?appid=YKAERX-QJJAE7kj2G6&input=' . $wolfram . '&format=html';