test for minimum image resolution?

graphical_force · January 2, 2008

Hello, I am using a script which uploads images. I am trying to check for a minimum image resolution. Any suggestions on how I may do that?

Right now I have it where it checks for a maximum.

Here is the code.

Thanks in advance.

<?php

// Checks to make sure that user is logged in
session_start();
if ( $_SESSION['user'] == null || $_SESSION['user'] < 1 )
{
	header( " Location: index.php" );
	exit;
}

require_once( "DB.php" );
$dsn = 'mysql://hrpjeff_root:password@localhost/hrpjeff_time';
$db =& DB::Connect( $dsn, array() );
if (PEAR::isError($db)) { die($db->getMessage()); }

$res = $db->query( "SELECT name FROM users WHERE id=?",
array( $_SESSION['user'] ) );
$res->fetchInto( $row );

// filename: upload.form.php

// first let's set some variables

// make a note of the current working directory relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the location of the upload handler
$uploadHandler = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'upload.processor.php';

// set a max file size for the html upload form
$max_file_size = 30000; // size in bytes

// now echo the html page
?><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html lang="en">
<head>
	<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">

	<link rel="stylesheet" type="text/css" href="stylesheet.css">

	<title>Upload form</title>

</head>

<body>

<?php

echo( $row[0] ); 

?>

<br/><br/>
<a href="logout.php">Logout</a>


<form id="Upload" action="<?php echo $uploadHandler ?>" enctype="multipart/form-data" method="post">

	<h1>
		Upload form
	</h1>

	<p>
		<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size ?>">
	</p>

	<p>
		<label for="file">File to upload:</label>
		<input id="file" type="file" name="file">
	</p>

	<p>
		<label for="submit">Press to...</label>
		<input id="submit" type="submit" name="submit" value="Upload me!">
	</p>

</form>


</body>

</html>