GD Help-Thumbnailing , So close...

ris

I now have GD enabled and have a random picture generator that is workinng properly. My problem now resides with trying to get my home page to reference the random image, one at a time per refresh or visit, and for them to be reduced to a much smaller size, somewhere around 250x 175 or so. On our home page it wil be like a picture of the moment etc..

Here is what I have so far. With the help of bradgrafelman davies. The randomizing page

www.egelands.com/randpic.php

code

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Untitled Document</title>
</head>

<body><?php
/*

Random Image Generator

This script will scan a directory of your choosing, ignoring folders and

the dreaded Thumbs.db file and then return a randum image from the specified

folder. Easy to customise and use :-) I recommend using include() with this.

This code is free to use and written by Steven Davies. If you do use, please

leave the comment in a code so other web authors can find this site!

This code was taken from www.phub.co.uk

/
/ Customise this line to change to your images folder /
$dir = 'ce/trips/arizona/bigimages';
$dh = opendir($dir);
/ The following loop scans the directory specified ignoring folders and Thumbs.db /
while (false !== ($filename = readdir($dh))) {
if($filename == "Thumbs.db" || is_dir($filename)){
}else{
$tempArray = explode(".", $filename);
/ Add image file types in the code below */
if($tempArray[1] == "jpg" || $tempArray[1] == "gif" || $tempArray[1] == "png" || $tempArray[1] == "tif" || $tempArray[1] == "bmp"){
$files[] = $filename;
}
}
}

/ Generate a random number /
$nooffildi = count($files);
$nooffiles = ($nooffildi-1);
srand((double)microtime()*1000000);
$randnum = rand(0,$nooffiles);

/ print the result /
echo "<IMG SRC='$dir/$files[$randnum]' ALT='$files[$randnum]' BORDER='0'><br>";
echo "";

</body>
</html>

Then for the "include ()" statement
www.egelands.com/test.php

code

<body>

<? include('randpic.php'); ?>

</body>
</html>

Does anyone have any ideas on how to get these to a reduced size and even linkable back to the original sized image?

bradgrafelman had suggested something similar to the following (but this was before he saw the above code)

<?php
header('Content-type: image/jpeg');

// --- BEGIN CONFIGURATION ---

$path = 'images/';
$width = 175;
$height = 250;

// --- END CONFIGURATION ---

$files = @glob(realpath($path) . '/{.JPG,.jpg,.JPEG,.jpeg}', GLOB_BRACE);
if($files === FALSE) die();
$filename = $files[rand(0, count($files)-1)];

list($width_orig, $height_orig) = getimagesize($filename);

if ($width && ($width_orig < $height_orig)) {
$width = ($height / $height_orig) $width_orig;
} else {
$height = ($width / $width_orig) $height_orig;
}

$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

imagejpeg($image_p, null, 100);
?>

bradgrafelman

Do you still have that script I gave you as "new.php" on your webserver?

I see you got your host to enable GD -- very nice. Looking at their config, they have "display_errors" off.

Add this to the top of the new.php script:

ini_set("display_errors", "On");

And then paste the output of the script here. I'm goin to bed for now, I may be back on in a few hours, not sure.

Snoopie

Function to make thumbnail pictures, without using GD:

<?PHP
function show_thumbnail($file)
{
   $max = 150; // max width/height
   $size = getimagesize("$file");
   if ( $size[0] <= $max && $size[1] <= $max )
   {
	$ret .= '<a href="'.$file.'" target="_blank">';
	$ret .= '<img src="'.$file.'" '.$size[3].' border="0">';
	$ret .= '</a>';
   }
   else
   {
	$k = ( $size[0] >= $size[1] ) ? $size[0] / $max : $size[1] / $max;
	$ret .= '<a href="'.$file.'" target="_blank">';
	$ret .= '<img src="'.$file.'" width="'.floor($size[0]/$k).'" height="'.floor($size[1]/$k).'" border="0">';	
	$ret .= '</a>';
   }
   return $ret;
}
?>

You can just edit it to suit your needs.

Weedpacket

Originally posted by Snoopie
Function to make thumbnail pictures, without using GD:

Those aren't thumbnails, just the original images forced into a smaller box. It does nothing except maximise download time and page size, hugely increase server load, and produce uglier results. Avoid.

Snoopie

Yeah, but if your host doesn't support GD..

Weedpacket

Get it supported or get a better host. (Not relevant in this case because GD is enabled.)

ris

I appreciate the replies

Gd is now enabled,see the following link

www.egelands.com/phpinfo.php

bradgrafelman,
New.php is still up, and I made your recommended change.

I also, am going to work now but will be back in the eve.

thanks for the help

here is the new.php code

<?php ini_set("display_errors", "On");
header('Content-type: image/jpeg');

// --- BEGIN CONFIGURATION ---

$path = 'ce/trips/arizona/';
$width = 175;
$height = 250;

// --- END CONFIGURATION ---

$files = @glob(realpath($path) . '/{.JPG,.jpg,.JPEG,.jpeg}', GLOB_BRACE);
if($files === FALSE) die('GLOB ERROR');
$filename = $files[rand(0, count($files)-1)];

list($width_orig, $height_orig) = getimagesize($filename);

if ($width && ($width_orig < $height_orig)) {
$width = ($height / $height_orig) $width_orig;
} else {
$height = ($width / $width_orig) $height_orig;
}

$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

imagejpeg($image_p, null, 100);
?>

The other 2 scripts listed in the above posts are still unchanged

bradgrafelman

This is a simple problem; there is whitespace in your new.php.

Make sure that the very first line is '<?PHP', and that the very LAST LINE OF THE ENTIRE FILE is '?>', not an EMPTY LINE, A SPACE AFTER THE '>', etc.

A simple space or line break anywhere outside the PHP tags will corrupt the output.

EDIT: If you find that this is true and beat yourself senseless over it, don't worry; it took me quite a while to figure that one out myself 😛. If this doesnt fix it for you, rename "new.php" to "new.phps" on your server and let me know when you've done so.

ris

The code inside new.phps is ( I deleted the begining and ending white space)

<?php ini_set("display_errors", "On");
header('Content-type: image/jpeg');

// --- BEGIN CONFIGURATION ---

$path = 'ce/trips/arizona/';
$width = 175;
$height = 250;

// --- END CONFIGURATION ---

$files = @glob(realpath($path) . '/{.JPG,.jpg,.JPEG,.jpeg}', GLOB_BRACE);
if($files === FALSE) die('GLOB ERROR');
$filename = $files[rand(0, count($files)-1)];

list($width_orig, $height_orig) = getimagesize($filename);

if ($width && ($width_orig < $height_orig)) {
$width = ($height / $height_orig) $width_orig;
} else {
$height = ($width / $width_orig) $height_orig;
}

$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

imagejpeg($image_p, null, 100);
?>

bradgrafelman

I am very sorry I didn't catch this error before.

If you wish to use a trailing slash on your $path, then you must change this:

$files = @glob(realpath($path) . '/{*.JPG,*.jpg,*.JPEG,*.jpeg}', GLOB_BRACE);

to this:

$files = @glob(realpath($path) . '{*.JPG,*.jpg,*.JPEG,*.jpeg}', GLOB_BRACE);

If you do not wish to edit that line, simply leave off the endig '/' in your $path. For example, you would just use:

$path = 'ce/trips/arizona';

Make that change in new.php. You may now delete new.phps from your server.

ris

I changed the path

PHP:

$path = 'ce/trips/arizona';

bradgrafelman

Weird. Re-post the entire content of new.php in here, could you?

(Make sure to use the

 tags)

ris

Thanks

<?php ini_set("display_errors", "On");
header('Content-type: image/jpeg');

// --- BEGIN CONFIGURATION ---

$path = 'ce/trips/arizona';
$width = 175;
$height = 250;

// --- END CONFIGURATION ---

$files = @glob(realpath($path) . '/{.JPG,.jpg,.JPEG,.jpeg}', GLOB_BRACE);
if($files === FALSE) die('GLOB ERROR');
$filename = $files[rand(0, count($files)-1)];

list($width_orig, $height_orig) = getimagesize($filename);

if ($width && ($width_orig < $height_orig)) {
$width = ($height / $height_orig) $width_orig;
} else {
$height = ($width / $width_orig) $height_orig;
}

$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

imagejpeg($image_p, null, 100);
?>

bradgrafelman

sigh I believe I need to steal the "PHP Retard" title from your signature. Why? BECAUSE I'M RETARDED! 🙂

This was an error on my part. The whitespaces would have corrupted the image, but you also need to correct this:

<?php ini_set("display_errors", "On"); 
header('Content-type: image/jpeg'); 

// --- BEGIN CONFIGURATION --- 

$path = 'ce/trips/arizona'; 
$new_width = 175; 
$new_height = 250; 

// --- END CONFIGURATION --- 


$files = @glob(realpath($path) . '/{*.JPG,*.jpg,*.JPEG,*.jpeg}', GLOB_BRACE); 
if($files === FALSE) die('GLOB ERROR'); 
$filename = $files[rand(0, count($files)-1)]; 

list($width_orig, $height_orig) = getimagesize($filename); 

if ($width && ($width_orig < $height_orig)) { 
$width = ($new_height / $height_orig) * $width_orig; 
} else { 
$height = ($new_width / $width_orig) * $height_orig; 
} 

$image_p = imagecreatetruecolor($width, $height); 
$image = imagecreatefromjpeg($filename); 
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig); 

imagejpeg($image_p, null, 100); 
?>

Try that 🙂

ris

I put the corrected code up as new4.php

I appreciate all the work. Maybe the thing I am requesting it do, is not possible. ? Thanks for helping though

bradgrafelman

Something's not working right on your server. Works fine on mine...

Change the new4.php to this:

<?php ini_set("display_errors", "On");  

// --- BEGIN CONFIGURATION --- 

$path = 'ce/trips/arizona';  

$new_width = 175;  

$new_height = 250;  

// --- END CONFIGURATION --- 


$files = @glob(realpath($path) . '/{*.JPG,*.jpg,*.JPEG,*.jpeg}', GLOB_BRACE);  

if($files === FALSE) die('GLOB ERROR');  

$filename = $files[rand(0, count($files)-1)];  

echo "file is: $filename <br>";

list($width_orig, $height_orig) = getimagesize($filename);  

echo "width_org is: $width_orig <br>height_orig is: $height_orig <br>";

if ($width && ($width_orig < $height_orig)) {  

$width = ($new_height / $height_orig) * $width_orig;  

} else {  

$height = ($new_width / $width_orig) * $height_orig;  

}  

$image_p = imagecreatetruecolor($width, $height);  

$image = imagecreatefromjpeg($filename);  

imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);  

imagejpeg($image_p, 'test_pic.jpg', 100);  

?>

Lemme know when u've changed it.

ris

I changed to

<?php ini_set("display_errors", "On");

// --- BEGIN CONFIGURATION ---

$path = 'ce/trips/arizona';

$new_width = 175;

$new_height = 250;

// --- END CONFIGURATION ---

$files = @glob(realpath($path) . '/{.JPG,.jpg,.JPEG,.jpeg}', GLOB_BRACE);

if($files === FALSE) die('GLOB ERROR');

$filename = $files[rand(0, count($files)-1)];

echo "file is: $filename <br>";

list($width_orig, $height_orig) = getimagesize($filename);

echo "width_org is: $width_orig <br>height_orig is: $height_orig <br>";

if ($width && ($width_orig < $height_orig)) {

$width = ($new_height / $height_orig) $width_orig;

} else {

$height = ($new_width / $width_orig) $height_orig;

}

$image_p = imagecreatetruecolor($width, $height);

$image = imagecreatefromjpeg($filename);

imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

imagejpeg($image_p, 'test_pic.jpg', 100);

?>

bradgrafelman

Sorry about the late reply -- I've been busy.

Try changing:

if($files === FALSE) die('GLOB ERROR');

if($files == FALSE || (!is_array($files) && strlen($files) < 1)) die('GLOB ERROR');

ris

Someone I work with who knows PHP suggested I first get a working copy of a script that will thumbnail and link. Then he said i could modify and combine the thumbnail script and the randomizer script. Here is a link to the script I downloaded for thumbnails. http://relativelyabsolute.com/spg/instructions.php

Here is what it looks like on my site.

http://www.egelands.com/lab/test/sp_index.php?dir=./Arizona%20Trip

Of course the above script thumbnails everything at once rather than a single image that i could put on my homepage as the picture of the day or moment.

Here is the link to the working randomizer

www.egelands.com/randpic.php

and the include () statement page

www.egelands.com/test.php

Do you think you could help me comvbine them, knowing what you know of my situation? Thanks, C