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How to get url ID in PHP? (for mysql_query UPDATE)
/** get url id **/
$id = isset($_GET['id']) ? $_GET['id'] : '';
@mysql_query("UPDATE short_urls SET long_url = 'test' WHERE url_id = '".$id."' LIMIT 1");

if (!isset($_GET['id'])) {
    die("missing query parameter");
}
$id = intval($_GET['id']);
if ($id === '') {
    die("Invalid query parameter");
}
$sql = "UPDATE short_urls SET long_url = 'test' WHERE url_id=$id LIMIT 1";
$result = mysql_query($sql);
if ($result === FALSE) {
    die("Mysql error: " . mysql_error() . $sql);
}

print "id=".$_GET['id'];

@mysql_query("UPDATE short_urls SET long_url = 'test' WHERE url_id = '".mysql_real_escape_string($id)."' LIMIT 1");

print_r($_GET);