How to resize an image with php

[Giovanni]

Hello,

I need to insert a resized image in a html page.

I know that using the html IMG tag it is possible to set the height
and width attributes, with no need of php (or server-side processing).

But my problem is the following:
I need to use the resized image as a table background - and
unfortunately html doesn't support the resize function for image used
as background !


Is it possible to resize an image dinamically (on the fly) by using
php ?
Is it possible without having GD libraries installed ?

Thanks in advance for your help.
Giovanni.

[Shawn Wilson]

Re: How to resize an image with php

Giovanni wrote:[color=blue]
>
> I need to insert a resized image in a html page.
>
> I know that using the html IMG tag it is possible to set the height
> and width attributes, with no need of php (or server-side processing).
>
> But my problem is the following:
> I need to use the resized image as a table background - and
> unfortunately html doesn't support the resize function for image used
> as background !
>
> Is it possible to resize an image dinamically (on the fly) by using
> php ?
> Is it possible without having GD libraries installed ?[/color]

You can do it dynamically with GD. PHP doesn't have any built-in image
functions.

If you have ImageMagick (ImageMagick.or g), you can use that too. And you may be
able to use GIMP, but I'm not sure.

Regards,
Shawn
--
Shawn Wilson
shawn@glassgian t.com

http://www.glassgiant.com

[CountScubula]

Re: How to resize an image with php

> >[color=blue][color=green]
> > Is it possible to resize an image dinamically (on the fly) by using
> > php ?
> > Is it possible without having GD libraries installed ?[/color]
>[/color]



Ok, the real quick and simple:

use this:

img src=pic.php?p=m e.jpg&w=100&h=1 0

then here is the pic.php

$p = $_GET['p'];
$w = $_GET['w'];
$h = $_GET['h'];

$ims = imagecreatefrom jpeg("path_to_p ics/$p");
$ow = imagesx($ims); $oh = imagesy($ims);
$imd = imagecreate($w, $h);
imagecopyresize d($imd,$ims,0,0 ,0,0,$w,$h,$ow, $oh);
//imagecopyresamp led($imd,$ims,$ 0,$0,0,0,$w,$h, $ow,$oh);

header("Content-type: image/jpeg");
imagejpeg($imd) ;

Thats it, its real quick and dirty, and it even lets you set a few
paramers on the img src tag :)
(use resampled instead of resized if compiled into your php, better
algorithm)


Mike Bradley
http://gzen.myhq.info -- free online php tools