generating thumbnail pics

[delpino]

i want to generate thumbnails with php.. anybody knows some script which does that?

[pnoeric]

there's a nice function in the notes on php.net/imagecopyresized com that does a better job than the built-in imagecopyresized() function. apart from that, check zend.com for a one-stop script. it's not hard, just a lot of detail work-- copying files around, looping thorugh allt he srouce files, etc.

best
Eric

[dgrinberg]

http://www.hotscripts.com/PHP/Scripts_and_Programs/Image_Galleries/

I have created a script that creates thumbnails usinig the GD extention for PHP. If you wanted to build it yourself then you could look at that, other wise try looking through whats at HotScripts.

[k_jazz]

Try ImageMagik
kinda geometry or mogrify in command shell

see man geometry

[bugi-best]

I've written a script to generate thumbnails of pics in "small"-Subdirectory. However, it doesn't work on my server.
This is the code:

function thumbnail($dir,$file) {

//if Thumbnail-Subdir does not exist, create it.
if (!is_dir("$dir/small")) {
	mkdir("$dir/small",0775);
};

//Is the file an image anyway?
if (!preg_match("/(\.jpg|\.jpeg|\.gif|\.GIF|\.png|\.PNG)$/",$file)) {	//Jpeg-Bild generieren
	return false;
};

//get original size
$size=getimagesize("$dir/$file"); //Bildgröße holen
$ox=$size[0];
$oy=$size[1];
if ($ox and $oy) {
	//compute scale (max. width or height = 100)
	$scale=min(100/$ox,100/$oy);

	//copy original to thumbnaildir
	system("cp $dir/$file $dir/small/$file");
	//only scale if picture is to large
	if ($scale<1) {
		//compute resulting size
		$dx=intval($ox*$scale);
		$dy=intval($oy*$scale);

		//mogrify picture and get any messages back in $err
		$cmd="/usr/bin/mogrify -format jpeg -geometry $dx"."x$dy $dir/small/$file 2>&1";
		$e=exec("/usr/bin/mogrify -geometry $dx"."x$dy $dir/small/$file 2>&1",$err);
	};
};
};

I called it with $dir="../material/bilder/Goennersdorf/", $file="1.jpeg"

This is, what mogrify says:
mogrify: no encode delegate for this image format (/MATERIAL/BILDER/GOENNERSDORF/SMALL/MAGICGR7C5😎 [No such file or directory].

Can anyone help?

[pnoeric]

you noticed that you set $cmd (right above the exec() statement) but then don't do anything with it, right?

if that doesnt' fix the problem, I'd double-check exactly what you're sending in the exec() statement, and I'd also echo $cmd to the screen as well... then try them both by hand.... you've done a good job of simplifying the code to isolate the bug, now VERIFY that the variables (in this case, the command line you are passing) are exactly right :-)

best
Eric

[bugi-best]

I've found the bug (just a couple of hours, grrr!!!): mogrify didn't like my relative path to the picture. I let php translate my path into an absolute one; now it works.

function translate($dir) {
	global $PATH_TRANSLATED;
	$pt=substr($PATH_TRANSLATED,0,strrpos($PATH_TRANSLATED,"/"));
	$dir="$pt/$dir";
	$dir=str_replace("/./","/",$dir);
	$dirs=explode("/",$dir);
	for ($i=0;$i<count($dirs);$i++) {
		if ($dirs[$i]=="..") {
			unset($dirs[$i--]);
			if ($i>-1) unset($dirs[$i--]);
		};
	};	
	if ($dirs[0]) return "/".implode("/",$dirs); else return implode("/",$dirs);
};
function thumbnail($dir,$file) {
	@set_time_limit(2);
	//create absolute path for mogrify; ".." doesn't work
	$dir=translate($dir);
	//Is the file an image anyway?
	if (!preg_match("/(\\.jpg|\\.jpeg|\\.gif|\\.png|)$/i",$file)) return false;
	//if Thumbnail-Subdir does not exist, create it.
	if (!is_dir("$dir/small")) mkdir("$dir/small",0775);
	//get original size
	$size=getimagesize("$dir/$file");
	$ox=$size[0]; $oy=$size[1];
	if ($ox and $oy) {
		//compute scale (max. width or height = 100)
		$scale=min(100/$ox,100/$oy);
		//copy original to thumbnaildir
		system("cp $dir/$file $dir/small/$file");
		//only scale if picture is to large
		if ($scale<1) {
			//compute resulting size
			$dx=intval($ox*$scale);
			$dy=intval($oy*$scale);
			//mogrify picture and get any messages back in $err
			$cmd="/usr/bin/mogrify -format jpeg -geometry $dx"."x$dy $dir/small/$file 2>&1";
			$e=exec($cmd);
		};
	};
};

Thanks for the hint with never used $cmd. Surely it had cost me another hour tomorrow. :-)

Bugi