Php Image Display Script

[Hawk Tuah]

I've found this foto.php script on a site.

http://www.photo-design.co.uk/art/foto.php?file=M0003

http://www.photo-design.co.uk/art/foto.php?file=M0003&mh=75

Its just a little script that displays an image and resize's it on the fly.

I've been searching all the php archives and I can't find this one anywhere. anyone seen it before, or know where I can get it.

 

[Dj_Jestar]

I think robmiller may have one of his own, if he is willing to share

If not, I'll try to knock one up tonight, as this isn't an amazingly complex script but it can be finickity and I haven't got access to a parser atm.

 

[Hawk Tuah]

Decided to stop being so lazy, and made my own.

http://www.bugone.co.uk/foto.php?file=1.jpg&hsize=100&vsize=100&pc=%

If anyone wants it, let me know.

 

[robmiller]

You can make it pay attention to aspect ratio, if you like - that is, given an image 200px x 100px, and a constraint size of 100px x 100px, it would resize it to 100px x 50px as opposed to "squashing" it to 100px x 100px.

Old code, so it probably needs tidying up, but it works well enough:

function resize($if, $of = null, $quality = 65, $new_w = 200, $new_h = 200) {
	
	if(eregi('(jpg|jpeg)$', $if)) {
		$type = 'jpg';
		$im = imagecreatefromjpeg($if);
	}
	elseif(eregi('png$', $if)){
		$type = 'png';
		$im = imagecreatefrompng($if);
	}
	elseif(eregi('gif$', $if)){
		$type = 'gif';
		$im = imagecreatefromgif($if);
	}
	
	$old_x = imagesx($im);
	$old_y = imagesy($im);
	
	if($old_x > $new_w || $old_y > $new_h) {
		
		if ($old_x > $old_y) {
			$thumb_w = $new_w;
			$thumb_h = $old_y * ($new_h / $old_x);
		}
		if ($old_x < $old_y) {
			$thumb_w = $old_x * ($new_w / $old_y);
			$thumb_h = $new_h;
		}
		if ($old_x == $old_y) {
			$thumb_w = $new_w;
			$thumb_h = $new_h;
		}
		
		$dst_img = imagecreatetruecolor($thumb_w, $thumb_h);
		imagecopyresampled($dst_img, $im, 0, 0, 0, 0, $thumb_w, $thumb_h, $old_x, $old_y);
		
		$im = $dst_img;
		
	}
	
	if($of && !is_writable(dirname($of))) {
		die('Whoops - your album directory is not writable. Please fix this, or I won\'t be able to generate any thumbnails!');
	}
	
	if($type == 'jpg'){
		imagejpeg($im, $of, $quality); 
	} 
	elseif($type == 'png') {
		imagepng($im, $of); 
	}
	else {
		imagegif($im, $of);
	}
	
	@imagedestroy($dst_img); 
	@imagedestroy($im);
	
}

 

[Hawk Tuah]

I can't get the to work. It fails on line 19. "$old_x = imagesx($im);"

Call to undefined function: imagesx() in C:\nuke\html\foto3.php on line 19.

Do I need some require's before I can run this?

 

[robmiller]

Nope, imagesx is a GD function. Weird. Try messing around with getimagesize instead

 

[Hawk Tuah]

I'm thinking its more to do with not getting a filename into it.

To simplify it for testing, I've removed the function like this and just populated the variables.

<?php
	
	$if = './1.jpg';
	$of = null;
	$quality = 65;
	$new_w = 200;
	$new_h = 200;
			
		
	if(eregi('(jpg|jpeg)$', $if)) {
		$type = 'jpg';
		$im = imagecreatefromjpeg($if);
	}
	elseif(eregi('png$', $if)){
		$type = 'png';
		$im = imagecreatefrompng($if);
	}
	elseif(eregi('gif$', $if)){
		$type = 'gif';
		$im = imagecreatefromgif($if);
	}
	
	$old_x = imagesx($im);
	$old_y = imagesy($im);
	
	if($old_x > $new_w || $old_y > $new_h) {
		
		if ($old_x > $old_y) {
			$thumb_w = $new_w;
			$thumb_h = $old_y * ($new_h / $old_x);
		}
		if ($old_x < $old_y) {
			$thumb_w = $old_x * ($new_w / $old_y);
			$thumb_h = $new_h;
		}
		if ($old_x == $old_y) {
			$thumb_w = $new_w;
			$thumb_h = $new_h;
		}
		
		$dst_img = imagecreatetruecolor($thumb_w, $thumb_h);
		imagecopyresampled($dst_img, $im, 0, 0, 0, 0, $thumb_w, $thumb_h, $old_x, $old_y);
		
		$im = $dst_img;
		
	}
	
	if($of && !is_writable(dirname($of))) {
		die('Whoops - your album directory is not writable. Please fix this, or I won\'t be able to generate any thumbnails!');
	}
	
	if($type == 'jpg'){
		imagejpeg($im, $of, $quality); 
	} 
	elseif($type == 'png') {
		imagepng($im, $of); 
	}
	else {
		imagegif($im, $of);
	}
	
	@imagedestroy($dst_img); 
	@imagedestroy($im);
	

?>

I'm guessing, does your code actually create a smaller image. The code I've used just resize's it. I'd much rather persevere with the code you've posted if it actually shrinks the image server side.

 

[robmiller]

Setting $of to null will output the image, and setting $of to a filename will save it to a file. Obviously you can set $if and $of to the same filename and it wil resize the actual image