Scrapebox Not Starting? Anyone Else?

<?
set_time_limit(0);
if(isset($_POST[must]) || isset($_POST[inurl]) || isset($_POST[can])){
function curl($url){
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_URL,$url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    
    $data = curl_exec ($ch);

//    $data = file_get_contents($url);
    
    return $data;
}
////BUILD THE GOOGLE URL


if (isset($_POST[must]) && $_POST[must] !==""){
    $must_box = $_POST[must];
    $must = str_replace(" ","+","\"".$_POST[must]."\"");
}else{
    $must = "";
}
if (isset($_POST[inurl]) && $_POST[inurl] !==""){
    $inurl = "+inurl%3A".$_POST[inurl];
}else{
    $inurl = "";
}
if (isset($_POST[can]) && $_POST[can] !==""){
    $can = "+".$_POST[can];
}else{
    $can = "";
}
$url = "http://www.google.com/search?q=".$must.$inurl.$can."&num=100&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&start=";
////END OF GOOGLE URL BUILD
echo $url;
//GET DATA URLS
for($i=0;$i<3;$i+=100){
$data = curl($url.$i);
//echo $data;

preg_match_all('/a href=\"(.*?)\" class=\"l\"/', $data, $matches); 
print implode("<br>", $matches[1]);

}

}else{
?>
<form action="serp_scraper.php" method="post">
<table>
    <tr>
        <td>Must Contain:</td><td><input type="text" name="must" value="<? echo $must_box; ?>"/></td>
    </tr>
    <tr>
        <td>In URL:</td><td><input type="text" name="inurl"  value="<? echo $inurl; ?>" /></td>
    </tr>
    <tr>
        <td>Can Contain:</td><td><input type="text" name="can" /></td>
    </tr>
    <tr>
        <td><input type="submit" /></td>
    </tr>
</table>
</form>
<?
}
?>