PHP help: resize uploaded image?

  • Thread starter Thread starter friedeggs
  • Start date Start date
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friedeggs

Guest
I grabbed this code off somewhere, and I need it to be tweaked a bit so that an uploaded image is resized to a certain height (and width according to aspect ratio) if it is too big:

<?php

// filename: upload.processor.php


$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

$uploadsDirectory = $_SERVER['DOCUMENT_ROOT'] . $directory_self . 'uploaded_files/';

$uploadForm = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'upload.form.php';

$uploadSuccess = 'http://' . $_SERVER['HTTP_HOST'] . $directory_self . 'upload.success.php';

$fieldname = 'file';



// possible PHP upload errors
$errors = array(1 => 'php.ini max file size exceeded',
2 => 'html form max file size exceeded',
3 => 'file upload was only partial',
4 => 'no file was attached');

isset($_POST['submit'])
or error('the upload form is neaded', $uploadForm);

($_FILES[$fieldname]['error'] == 0)
or error($errors[$_FILES[$fieldname]['error']], $uploadForm);

@is_uploaded_file($_FILES[$fieldname]['tmp_name'])
or error('not an HTTP upload', $uploadForm);

@getimagesize($_FILES[$fieldname]['tmp_name'])
or error('only image uploads are allowed', $uploadForm);

// make a unique filename for the uploaded file and check it is
// not taken... if it is keep trying until we find a vacant one
$now = time();
while(file_exists($uploadFilename = $uploadsDirectory.$now.'-'.$_FILES[$fieldname]['name']))
{
$now++;
}

// now let's move the file to its final and allocate it with the new filename
@move_uploaded_file($_FILES[$fieldname]['tmp_name'], $uploadFilename)
or error('receiving directory insuffiecient permission', $uploadForm);

header('Location: ' . $uploadSuccess);

// make an error handler which will be used if the upload fails
function error($error, $location, $seconds = 5)
{
header("Refresh: $seconds; URL=\"$location\"");
echo '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"'."\n".
'"http://www.w3.org/TR/html4/strict.dtd">'."\n\n".
'<html lang="en">'."\n".
'<head>'."\n".
'<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">'."\n\n".
'<link rel="stylesheet" type="text/css" href="stylesheet.css">'."\n\n".
'<title>Upload error</title>'."\n\n".
'</head>'."\n\n".
'<body>'."\n\n".
'<div id="Upload">'."\n\n".
'<h1>Upload failure</h1>'."\n\n".
'<p>An error has occured: '."\n\n".
'<span class="red">' . $error . '...</span>'."\n\n".
' The upload form is reloading</p>'."\n\n".
' </div>'."\n\n".
'</html>';
exit;
}

?>



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Any help would be much appreciated! =)
 
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