Image Resize On the Fly

The Little Guy · March 25, 2007

Anyone know why this isn't working? I can not figure it out. It was working at one point, I don't think I did anything to it, and now it doesn't work.

When I do This on my page, All it does is print the alt text.

<img alt="image" src="resize.php?image_id=<?php echo $_GET['image_id'];?>&percent=<?php echo $_GET['percent']; ?>">

Resize.php:

<?php
// The file
session_start();
$img_id = $_GET['image_id'];
include"db.php";
$img = mysql_query("SELECT * FROM files where file_id='$img_id'")or die(mysql_error());
$imgs = mysql_fetch_array($img);
$filename = "users/".$_SESSION['user']."/".$imgs['file_name'];

$percent = $_GET['percent'];
switch($percent){
case ".25";
	$percent = .25;
break;
case ".50";
	$percent = .50;
break;
case ".75";
	$percent = .75;
break;
case "1";
	$percent = 1;
break;
default:
	$size = GetImageSize($filename);
	$width = $size[0];
	if($width < 200){
		$percent = 1;
	}else{
		$percent = .5;
	}
break;
}

// Content type
if(getext($filename)=='.jpg'){
header('Content-type: image/jpeg');
}elseif(getext($filename)=='.gif'){
header('Content-type: image/gif');
}elseif(getext($filename)=='.png'){
header('Content-type: image/png');
}

// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = $width * $percent;
$newheight = $height * $percent;

// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);

if(getext($filename)=='.jpg'){
$source = imagecreatefromjpeg($filename);
}elseif(getext($filename)=='.gif'){
$source = imagecreatefromgif($filename);
}elseif(getext($filename)=='.png'){
$source = imagecreatefrompng($filename);
$alpha = imagealphablending($source, true);
imagesavealpha($alpha, true);
}
// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

// Output
if(getext($filename)=='.jpg'){
imagejpeg($thumb);
}elseif(getext($filename)=='.gif'){
imagegif($thumb);
}elseif(getext($filename)=='.png'){
imagepng($thumb);
}
?>

MadTechie · March 25, 2007

Whats $filename returning?

<?php

$filename = "users/".$_SESSION['user']."/".$imgs['file_name'];
echo $filename; //<--Add
die; //<--Add
?>

The Little Guy · March 25, 2007

One example (It is the correct file path):

users/ryan/07.jpg

MadTechie · March 25, 2007

changing the

<?php
$filename = "users/".$_SESSION['user']."/".$imgs['file_name'];
?>

so is the full path to the image or even add a $filename below it with a full known path just to force it to a image.

The Little Guy · March 25, 2007

I have tried, and I get this result (Same result as before):

http://tzfiles.com/resize.php?image_id=165&percent=1

MadTechie · March 25, 2007

ok well i think you have a GD problem,

try

<?php
// Load
$thumb = @imagecreatetruecolor($newwidth, $newheight)  
     or die("Cannot Initialize new GD image stream")  //<---changed

?>

do a phpinfo(); and check it

The Little Guy · March 25, 2007

My PHP info:

http://tzfiles.com/info.php

MadTechie · March 25, 2007

Hummmmmm

OK hate me but still please try this

add this

<?php

function getext()
{
return ".jpg";
}

?>

and test a jpg file

from my server (linking to yours without the database of course)

http://www.madtechiesupport.com/test3.php?user=ryan&image_id=img_23&percent=.75

The Little Guy · March 25, 2007

If I add that, it just says that that function has already been declared (Declared in db.php)

I am also not exactly sure what you want me to do.

MadTechie · March 25, 2007

ok you have a problem in the db.php then,

only works with jpg's but its only a test as well..

here's my link

www.madtechiesupport.com/test3.php?user=ryan&image_id=img_23&percent=.75

heres the code

<?php


function getext()
{
return ".jpg";
}
// The file
session_start();
$img_id = $_GET['image_id'];
$user = $_GET['user'];
/*include"db.php";
$img = mysql_query("SELECT * FROM files where file_id='$img_id'")or die(mysql_error());
$imgs = mysql_fetch_array($img);
$filename = "users/".$_SESSION['user']."/".$imgs['file_name'];*/
$filename = "http://tzfiles.com/users/$user/$img_id.jpg";

$percent = $_GET['percent'];
switch($percent){
case ".25";
	$percent = .25;
break;
case ".50";
	$percent = .50;
break;
case ".75";
	$percent = .75;
break;
case "1";
	$percent = 1;
break;
default:
	$size = GetImageSize($filename);
	$width = $size[0];
	if($width < 200){
		$percent = 1;
	}else{
		$percent = .5;
	}
break;
}

// Content type
if(getext($filename)=='.jpg'){
header('Content-type: image/jpeg');
}elseif(getext($filename)=='.gif'){
header('Content-type: image/gif');
}elseif(getext($filename)=='.png'){
header('Content-type: image/png');
}

// Get new sizes
list($width, $height) = getimagesize($filename);
$newwidth = $width * $percent;
$newheight = $height * $percent;

// Load
$thumb = imagecreatetruecolor($newwidth, $newheight);

if(getext($filename)=='.jpg'){
$source = imagecreatefromjpeg($filename);
}elseif(getext($filename)=='.gif'){
$source = imagecreatefromgif($filename);
}elseif(getext($filename)=='.png'){
$source = imagecreatefrompng($filename);
$alpha = imagealphablending($source, true);
imagesavealpha($alpha, true);
}
// Resize
imagecopyresized($thumb, $source, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

// Output
if(getext($filename)=='.jpg'){
imagejpeg($thumb);
}elseif(getext($filename)=='.gif'){
imagegif($thumb);
}elseif(getext($filename)=='.png'){
imagepng($thumb);
}
?>

The Little Guy · March 25, 2007

that didn't work...

I realized that If I view the source, I get this:

Warning: getimagesize() [<a href='function.getimagesize'>function.getimagesize</a>]: URL file-access is disabled in the server configuration in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 52

Warning: getimagesize(http://tzfiles.com/users/ryan/img_23.jpg) [<a href='function.getimagesize'>function.getimagesize</a>]: failed to open stream: no suitable wrapper could be found in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 52

Warning: imagecreatetruecolor() [<a href='function.imagecreatetruecolor'>function.imagecreatetruecolor</a>]: Invalid image dimensions in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 57

Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: URL file-access is disabled in the server configuration in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 60

Warning: imagecreatefromjpeg(http://tzfiles.com/users/ryan/img_23.jpg) [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: failed to open stream: no suitable wrapper could be found in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 60

Warning: imagecopyresized(): supplied argument is not a valid Image resource in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 69

Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/.marble/ryannaddy/tzfiles.com/resize.php on line 73

MadTechie · March 25, 2007

change the

$filename = "http://tzfiles.com/users/$user/$img_id.jpg";

to

$filename = "users/$user/$img_id.jpg";

for your one

i needed the "http://tzfiles.com/" as its running from my server.

The Little Guy · March 25, 2007

by changing $filename to this:

$filename = "users/$user/$img_id.jpg";

Made it work.

The Little Guy · March 25, 2007

Umm..... OK.... I didn't change any code, and now the original code works... WTF?

MadTechie · March 25, 2007

Erm.. Well Done.. i think lol ???

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