my thumbnails are not showing up...

[iso-latte-d]

to create thumbnails, i've tried scripts from:

http://www.phpbuilder.com/board/showthread.php?s=&threadid=10222182
and
http://www.phpbuilder.com/board/showthread.php?s=&threadid=10237051&highlight=image+thumbnail
and
http://www.zend.com/codex.php?id=226&single=1

each script didn't give me any error msg (which is good...), however the thumbnails are not showing up.
it only displays empty boxes with cross icons (the sign of no pictures).
the file paths are ok, i've checked it.
so, what could be the problem?

thanks,

daniel

[immot]

Check the server's error logs,

or

comment the image header and type the url of your thumbnailer script to browser's url field to see the error messages (if you have error messages turned on)

[iso-latte-d]

you mean, comment out the image header?
it gave me this rubbish

ÿØÿàJFIFÿþ-GYÔd–Õ¬c‘€LQÙ”óÿÚgâ]·Â۳ᯏuox¦øeß|5ñ7¤ðwÄ+Ý.z7ƒu ÜÜÛ|1ñVÝOÂ^{SÑt‹í"ýáÒu{moN½Ôl¦Gpí/Óc1RÁàªÕÂÚ®.’¡AÁ¸{IÁ{’|é=[ÅõLòeIWÄAU’Œ9ɶÔUÜÕÝÛV¶«¶»...this} is actually quite long.

what does it mean btw?

[iso-latte-d]

just thought probably i need to post it in...
i snatched this script from the web, probably from this site, i can't really remember. i tried many different scripts, and i didn't know where i'm making the mistake.

the script below is just to test one picture in the directory, to see if it works.
i'm sure the scripts i've seen on the web (including this) are supposed to work, i believe the error is from my part, i just don't know what it is.

the directory is correct, cos i can read from the directory and it's giving me the right file. my gd library is ver2 or higher. i think it's loaded up, because it managed to display a white blank box with a small cross icon inside (sign of no pictures...)

thanks,

daniel

<?php

$picture_location = "images/banner1.jpg";
$size=400; // size in pixel u want the picture to come out 

$im_size = GetImageSize ($picture_location); 
$imageWidth = $im_size[0]; 
$imageHeight = $im_size[1]; 

$im2 = ImageCreateFromJPEG($picture_location); 

if ($imageWidth>=$imageHeight) 
{ 
	$width=$size; 
	$height = ($width/$imageWidth)*$imageHeight; 
} 
else 
{ 
	$height=$size; 
	$width = ($height/$imageHeight)*$imageWidth; 
} 

$im = imageCreateTrueColor( $width, $height ); 

ImageCopyResized ($im,$im2, 0, 0, 0, 0, $width, $height, imageWidth, $imageHeight); 

Header("Content-type: image/jpeg"); 
Imagejpeg($im,'',100); 
ImageDestroy($im); 
ImageDestroy ($im2);

?>

[Weedpacket]

Originally posted by iso-latte-d
you mean, comment out the image header?
it gave me this rubbish

That sample looks a JPEG file header.

What are the "properties" of the broken image? right-click->"properties". Or what if you save the image and then try and open it in an image viewer (or a text editor for that matter)?

Could you post a link so that others can see the faulty image?

[iso-latte-d]

don't worry about the broken image.
finally i was able to display one image taken from a directory.
however, when i attempt to display the whole images from the directory, it only displays the first one.
plus, if i debug it from zend studio...i got an error message, call to undefined function - imagecreatefromjpeg()

here's the code...

<?php
	$size = 150;
	//$location = "images/banner1.jpg";

$dir = "images/";
$handle = opendir($dir); 

while ($file = readdir($handle)) 
{ 
	if (($file!=".")&&($file!="..")&&($file!="Thumbs.db"))	
	{
		$location = $dir.$file;

		$image = imagecreatefromjpeg($location);
		$w = imagesx($image);
		$h = imagesy($image);

		if ($w >= $h) 
		{ 
			$wt = $size; 
			$ht = ($wt/$w)*$h; 
		} 
		else 
		{ 
			$ht = $size; 
			$wt = ($ht/$h)*$w; 
		} 

		$thumb = imagecreatetruecolor($wt,$ht);
		imagecopyresampled($thumb,$image,0,0,0,0,$wt,$ht,$w,$h);

		Header("Content-type:image/jpeg");

		imagejpeg($thumb,'',100);
		imagedestroy($image);
		imagedestroy($thumb);

	}	
} 
closedir($handle);
?>

btw, if i were to place this thumbnail inside the table, how do i get around the header problem?

thanks,

daniel

[Weedpacket]

Originally posted by iso-latte-d
don't worry about the broken image.
finally i was able to display one image taken from a directory.
however, when i attempt to display the whole images from the directory, it only displays the first one.

That's to be expected: an image/jpeg response contains a JPEG image. Not several JPEG images, one JPEG image. If you want a series of JPEGs, the reasonable thing to do would be to have an HTML page with your readdir() loop in it creating links to the image script, and passing it the filename in the URL.

[iso-latte-d]

here's my original script with the tables...

<html>
<head>
<title>Untitled document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body>
<table width="100%" border="0" cellspacing="0" cellpadding="10">
			<tr>
     		<?php
     		 	$dir = "gallery/images/";
				$handle = opendir($dir); 

			$count = 1;
			while ($file = readdir($handle)) 
			{ 
				if (($file!=".")&&($file!="..")&&($file!="Thumbs.db"))	
				{
					if ($count == 4)
					{
						echo "</tr>\n";
						echo "<tr>\n";
						$count = 1;
					}
					else
					{
						$img = $dir.$file;
						echo "<td><img src=\"gallery/thumb2.php?location=$img\"><br>$file</td>\n";
						$count++;
					}
				}	
			} 
			closedir($handle);
		?>
		</tr>   
</table>
</body>			
</html>

here's the thumbnailer...

<?php
	$size = 300;
	//$location = "images/chessguy.jpg";

$image = imagecreatefromjpeg($location);
$w = imagesx($image);
$h = imagesy($image);

if ($w >= $h) 
{ 
	$wt = $size; 
	$ht = ($wt/$w)*$h; 
} 
else 
{ 
	$ht = $size; 
	$wt = ($ht/$h)*$w; 
} 
$thumb = imagecreatetruecolor($wt,$ht);
imagecopyresampled($thumb,$image,0,0,0,0,$wt,$ht,$w,$h);
Header("Content-type:image/jpeg");
imagejpeg($thumb,'',100);
imagedestroy($image);
imagedestroy($thumb);

?>

i hope you can enlighten me...🙂

thanks

daniel

[Weedpacket]

Originally posted by iso-latte-d
i hope you can enlighten me...🙂

As to what? At the very least I'd [man]urlencode[/man] $img before putting it in the URL, and in the thumbnail script I'd use $_GET['location'] instead of $location.