simple sql scanner

<form action="" method="post">
<input type="text" value="www.intelligentexploit.com/api/search-exploit?name=wordpress" name="site">
<input type="submit" name="submit" value="scan">
</form>
<?php
error_reporting(0);
if($_POST['submit']){
$url = $_POST['site'];
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $url);
                curl_setopt($ch, CURLOPT_HEADER, TRUE);
                curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:32.0) Gecko/20100101 Firefox/32.0");
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
                $result =curl_exec($ch);
                curl_close($ch);
if (preg_match("/error in your SQL syntax|mysql_fetch_array()|execute query|mysql_fetch_object()|mysql_num_rows()|mysql_fetch_assoc()|mysql_fetch&#8203;_row()|SELECT * FROM|supplied argument is not a valid MySQL|Syntax error|Fatal error/i",$result)){
    echo "Gak Vuln";
}else {
    $url = $_POST['site'];
    $_rurl = str_replace("=","='",$_url);
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $_rurl);
                curl_setopt($ch, CURLOPT_HEADER, TRUE);
                curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:32.0) Gecko/20100101 Firefox/32.0");
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
                $result =curl_exec($ch);
                curl_close($ch);
                if (preg_match("/error in your SQL syntax|mysql_fetch_array()|execute query|mysql_fetch_object()|mysql_num_rows()|mysql_fetch_assoc()|mysql_fetch&#8203;_row()|SELECT * FROM|supplied argument is not a valid MySQL|Syntax error|Fatal error/i",$result)){
    echo "Vuln";
    }
}
ob_flush();
flush();
}
?>