Date: 02/21/06 (PHP Community)    Keywords: no keywords

i've never had to work with images before, so this is my first time and i'm quite enjoying it, however i seem to be getting black images as opposed to resized version of the files i input, what am i doing wrong?


class upload_utility
{
var $settings;
var $presettings;

public function __construct($settings)
{
global $presettings;

$this->settings = $settings;
$this->_POST = $_POST;
$this->presettings = $presettings;
//$this->_POST['imgfile'] = $_FILES['imgfile'];

echo "1";
}

private function checkfilename()
{
$file_ext = strtolower(substr($_FILES['imgfile']['name'], -4));

if (!in_array($file_ext, array('.jpg','jpeg','.gif','.png')))
{
unlink($this->_POST['imgfile']);
eval(standard_error(fetch_error('grps_extension_unknown')));
die;
}

echo "2";
}

private function makelargecopy()
{
//if (is_uploaded_file($_FILES['imgfile']))
if (is_uploaded_file($_FILES['imgfile']['tmp_name']))
{
$this->imagedimes = getimagesize($_FILES['imgfile']['tmp_name']);
$imagewidth = $this->imagedimes[0];
$imageheight = $this->imagedimes[1];
$maxheight = $this->settings['bigimgsize'];
$imageog = $imageheight;
$imgdimes = array();

if ($imageheight > $maxheight)
{
$imageproportions = ($maxheight * 100) / $imageheight;
$imgdimes['width'] = ($imagewidth * $imageproportions) / 100 ;
$imgdimes['height'] = $maxheight;
}

if ($imageheight <= $maxheight)
{
$imageproportions = ($maxheight * 100) / $imageheight;
$imgdimes['width'] = ($imagewidth * $imageproportions) / 100 ;
$imgdimes['height'] = $maxheight;
}

$newimagebg = imagecreatetruecolor($imgdimes['width'],$imgdimes['height']);

// Get Mime Type
switch ($this->imagedimes['mime'])
{
case 'image/jpeg':
$newimage = imagecreatefromjpeg($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . ".jpg";
imagejpeg($newimagebg, $newfilename, $this->settings['bigimgquality']);
break;
case 'image/gif':
$newimage = imagecreatefromgif($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . ".gif";
imagegif($newimagebg, $newfilename, $this->settings['bigimgquality']);
break;
case 'image/png':
$newimage = imagecreatefrompng($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . ".png";
imagepng($newimagebg, $newfilename, $this->settings['bigimgquality']);
break;
default:
eval(standard_error(fetch_error('grps_upload_error')));
break;
}
}
else
{
eval(standard_error(fetch_error('grps_upload_error_wtf')));
}

echo "3";
}

private function makethumbcopy()
{
if (is_uploaded_file($_FILES['imgfile']['tmp_name']))
{
$this->imagedimes = getimagesize($_FILES['imgfile']['tmp_name']);
$imagewidth = $this->imagedimes[0];
$imageheight = $this->imagedimes[1];
$maxheight = $this->settings['thumbimgsize'];
$imageog = $imageheight;
$imgdimes = array();

if ($imageheight > $maxheight)
{
$imageproportions = ($maxheight * 100) / $imageheight;
$imgdimes['width'] = ($imagewidth * $imageproportions) / 100 ;
$imgdimes['height'] = $maxheight;
}

if ($imageheight <= $maxheight)
{
$imageproportions = ($maxheight * 100) / $imageheight;
$imgdimes['width'] = ($imagewidth * $imageproportions) / 100 ;
$imgdimes['height'] = $maxheight;
}

$newimagebg = imagecreatetruecolor($imgdimes['width'],$imgdimes['height']);

// Get Mime Type
switch ($this->imagedimes['mime'])
{
case 'image/jpeg':
$newimage = imagecreatefromjpeg($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . "_thumb.jpg";
imagejpeg($newimagebg, $newfilename, $this->settings['thumbimgquality']);
break;
case 'image/gif':
$newimage = imagecreatefromgif($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . "_thumb.gif";
imagegif($newimagebg, $newfilename, $this->settings['thumbimgquality']);
break;
case 'image/png':
$newimage = imagecreatefrompng($_FILES['imgfile']['tmp_name']);
imagecopyresampled($newimagebg, $newimage, 0, 0, 0, 0, $$imgdimes['width'], $imgdimes['height'], $imagewidth, $imageheight);
$newfilename = $this->settings['imgdir'] . "/" . intval($this->_POST['g']) . "_" . intval($this->_POST['u']) . "_" . TIMENOW . "_thumb.png";
imagepng($newimagebg, $newfilename, $this->settings['thumbimgquality']);
break;
default:
eval(standard_error(fetch_error('grps_upload_error')));
break;
}

echo "4";
}
else
{
eval(standard_error(fetch_error('grps_upload_error')));
}
}

private function cleanup()
{
imagedestroy($this->newimage);
echo "5";
}

public function process()
{
//print_r($_POST);
//print_r($_FILES);
//die;
$this->checkfilename();
$this->makelargecopy();
$this->makethumbcopy();
$this->cleanup();

echo "got here";
}
}


there were some double $$'s in there.

Source: http://community.livejournal.com/php/416624.html