PHP search site database, ask

PHP Database Search

I want to do a search in the Site database search box,
When you're done, it's empty, not even the search box or the buttons.
What is it, please?
The code is as follows

Search

Include ("conn.php");
$db =new mysql (' localhost ', ' root ', ' ', ' sjzl ', ' UTF8 ');
if ($_get[key]) {
$sql = "SELECT * from the message where ShowName like '%$_get[key] '";
$result =mysql_query ($sql);
while ($arr = Mysql_fetch_array ($result)) {
$arr [Showname]=preg_replace ("/($_get[key])/I", "\1", $arr [ShowName]);
echo $arr [ShowName];
}
echo $arr [ShowName];
}
?>

Key words:

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