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case banner_upload:	$allowed = array("jpg", "gif", "png");	$line = explode('.',$_REQUEST['userfile']);	$ext = $line[1];if (isset($_REQUEST['userfile']) && !in_array($ext, $allowed)) {	echo "$ext Not an allowed file type! File not Uploaded.";} elseif (isset($_REQUEST['userfile']) && in_array($ext, $allowed)) {															$uploaddir = 'banners/';	$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);														        	if (move_uploaded_file($_FILES['userfile']['tmp_name'],$uploadfile)) {					echo "File is valid, and was successfully uploaded.";		}		}													echo "	<form enctype='multipart/form-data' action='index.php?page=banner_upload' method='post'>        <input type='hidden' name='MAX_FILE_SIZE' value='30000' />	<table border='0'>	<tr>	<td>File to upload</td>	<td><input name='userfile' type='file' /></td>	</tr>	<tr>	<td>&nbsp;</td>	<td>	<div align='right'>Upload file:	<input type='submit' value='Upload' />	</div></td></tr>	</table>	</form>";											break;