[var]

Is it possible to resize an image hosted on a seperate site on the fly..

for instance say i have an image on photobucket, can i resize it on the fly and be able to call it like this:

<img src=resize.php?height=x&width=x&src=http://photobucket.com/blah/pic.jpg>

i've been trying alsorts but nothing seems to work.

The reason i need it to work and be called like this is because i am using str_replace and replacing '<img src=' with '<img src=resize.php?height=x&width=x&src=' so that it resizes every image with the resized version.

any ideas where i am going wrong or is this just not possible?

thanks.

[UnrealEd]

It is possible, but on must server's it isn't allowed by default.

In the php.ini file (the php config file) there's a setting that allows the reading of files hosted on a different domain, and thus needed to be accessed via the http protocol. This setting, named allow_url_fopen should be turned On

If that doesn't work, you could open a socket to the url of the file, grab the data that is passed through the socket, treat it as an image and do the resizing of it. It's a lot more complex, but will work on any server (unless the socket functions are disabled, which is the case on most free webhosts)

[var]

yes my allow_url_fopen is on, but how will that help?
this all sounds rather complex for what im trying to achieve.

all i wanna do is make a tiny script that takes the image src, checks its size, if its over x wide then shrink it, if not then leave it alone.

[UnrealEd]

Can you tell us what is wrong with the current code? Does the image show? Are you getting any errors while running the code?

[var]

there are no errors shown, and the image just shows a broken image symbol.

this is the code for imageresize.php:

PHP Code:

<?php



$isrc = $_GET['isrc'];

$w = $_GET['w'];

$h = $_GET['h'];



$in = getimagesize($isrc);

$sw = $in[0] / $w;

$sh = $in[1] / $h;

$s  = $sw < $sh ? $sw : $sh;



$x0 = floor( ( $in[0] - ( $w * $s ) ) * 0.5 );

$y0 = floor( ( $in[1] - ( $h * $s ) ) * 0.5 );



$im = imagecreatefromjpeg($isrc) or

$im = imagecreatefrompng($isrc) or

$im = imagecreatefromgif($isrc) or

$im = false;



if (!$im) {

    readfile($isrc);

} else {

    $thumb = imagecreatetruecolor($w, $h);

    imagecopyresampled($thumb, $im, 0, 0, $x0, $y0, $w, $h, ($w * $s), ($h * $s));

    imagejpeg($thumb);

}

?>

and i call it like this:

PHP Code:

<img src=imageresize.php?w=200&h=200&isrc=http://photobucket.com/blah/pic.jpg> 

[UnrealEd]

Looking at your code, I'd say error reporting is set to off, because it should throw at least 1 error. This piece of code

PHP Code:

$im = imagecreatefromjpeg($isrc) or
$im = imagecreatefrompng($isrc) or
$im = imagecreatefromgif($isrc) or
$im = false; 

should throw a syntax error. The correct way to do it is

PHP Code:

$im = imagecreatefromjpeg($isrc) or imagecreatefrompng($isrc) or imagecreatefromgif($isrc) or false; 

But if I'm not mistaken, calling imagecreatefromjpeg on a gif will throw a warning, so you will have to silense the warning using @:

PHP Code:

$im = @imagecreatefromjpeg($isrc) or @imagecreatefrompng($isrc) or @imagecreatefromgif($isrc) or false; 

Place this small code snippet at the top of the resize.php page, and see if any error is outputted:

PHP Code:

ini_set('display_errors', 'On');
error_reporting (E_ALL | E_STRICT); 

The errors probably won't show when you call the script through the <img src=""> tag. Try opening the page in your browser by passing on a url.

[Nico]

His code looks actually right to me! Your's will run through the different functions, but it won't assign $im unless it's an JPG.

[UnrealEd]

Damn, didn't know that. I'd better start checking all my code.
I always assumed the returned value would be assigned to the variable

[var]

so any idea why its not working?
could it be my php version, phpinfo says "PHP Version 4.4.9"

[Nico]

Why are you still on PHP 4?!?!?! Anything below PHP 5.3 is not officially supported anymore. If you're not on a VPS or private host, ask your provider to update!

Then, take a look at what UnrealEd says:

Originally Posted by UnrealEd

It is possible, but on must server's it isn't allowed by default.
In the php.ini file (the php config file) there's a setting that allows the reading of files hosted on a different domain, and thus needed to be accessed via the http protocol. This setting, named allow_url_fopen should be turned On

If this isn't enabled, it won't work.

Try this as well:

Originally Posted by UnrealEd

Place this small code snippet at the top of the resize.php page, and see if any error is outputted:

PHP Code:

ini_set('display_errors', 'On');
error_reporting (E_ALL | E_STRICT); 

People are trying to help, but you have to listen and try the suggestions. Otherwise we won't be able to help.