GD library

[Woodburn2006]

i am creating a php based site to blog my travelling experiences and wanted to use the GD Library to create thumbnails of the images i upload whilst i am away. i have downloaded gd but cannot find an instruction manual on how to install it or use it with php.

 

i was wondering if anybody could help me with this?

 

thanks alot

[BlueSkyIS]

first: are you sure GD is not already installed? if not, do you have the ability to re-compile PHP with GD enabled?

 

http://us.php.net/manual/en/image.installation.php

 

[Woodburn2006]

well from looking at that it all looks jibberish, im not amazing at php i can do some things with it but nothing too complicated which this looks?

 

is it a hard process setting up gd and using it?

[BlueSkyIS]

if it's already installed, there is nothing to set up. that's why you need to know whether it is already installed or not. you can probably figure that out real quick by trying to use this thumbnail creation function that someone posted here a while back:

 

// CREATE THUMBNAILS OF ALL JPEG IMAGES IN A DIRECTORY
function createThumbs($pathToImages,$pathToThumbs,$thumbWidth) {
//open the directory
$dir=opendir($pathToImages);

//loop through it,looking for any/all JPG files:
while(false!==($fname=readdir($dir))){
	//parse path for the extension
	$info=pathinfo($pathToImages.$fname);
	//continue only if this is a JPEG image
	if(strtolower($info['extension'])=='jpg') {
		//load image and get image size
		$img=imagecreatefromjpeg("{$pathToImages}{$fname}");
		$width=imagesx($img);
		$height=imagesy($img);

		//calculate thumbnail size
		$new_width=$thumbWidth;
		$new_height=floor($height*($thumbWidth/$width));

		//create a new temporary image
		$tmp_img=imagecreatetruecolor($new_width,$new_height);

		//copy and resize old image into new image
		imagecopyresized($tmp_img,$img,0,0,0,0,$new_width,$new_height,$width,$height);

		//save thumbnail into a file
		imagejpeg($tmp_img,"{$pathToThumbs}{$fname}");
	}	
}
//close the directory
closedir($dir);
}

[toyfruit]

You probably know this, but if you create a phpinfo() file it will tell you if GD Library is on the server.

 

Just put this code in a php page (myfile.php) and upload it to your server, then run it.

 

<?php

phpinfo();

?>

 

 

[Woodburn2006]

cool thanks that last post helped.

 

i found this in the phpinfo:

 

gd

GD Support  enabled 

GD Version  bundled (2.0.34 compatible) 

FreeType Support  enabled 

FreeType Linkage  with freetype 

FreeType Version  2.1.4 

GIF Read Support  enabled 

GIF Create Support  enabled 

JPG Support  enabled 

PNG Support  enabled 

WBMP Support  enabled 

XPM Support  enabled 

XBM Support  enabled 

 

does this mean it is on my server?

 

http://travelling.dw20.co.uk/phpinfo.php

[BlueSkyIS]

i'd say yes, you have GD installed.

[Woodburn2006]

cool so thats one problem sorted, the next being is it hard to use to create simple thumbnails of images or can it get quite complicated and gritty? also are there any good tutorials out there to guide me along the way?

[BlueSkyIS]

the code i posted before will make thumbs of all images in a directory. you can alter it to make thumbs however you like.