PHP - Thumbnail-web-screenshots-script With Php

Any one know a tutorial for an easy to use thumbnail script which I can use with pictures stored in mysql database.

I have a quick question about a script I wrote that searches all .jpg images in a directory (and it's sub-directories) and makes thumbnails of them. The problem I am having is that I am getting an internal server error after about 15 seconds. I have included my script, the class it requires, and my php.ini file that resides in the root of my site. I have searched for a couple of hours online and haven't been able to come up with an answer as to why I am getting that error.

The thumbnail file...
Code: [Select]
<?php
set_time_limit(0);
require_once('classes/Create_Thumbnail.php');

$filter = '.jpg';
$directory = 'media'; // Do not include a trailing slash
$it = new RecursiveDirectoryIterator("$directory");
foreach(new RecursiveIteratorIterator($it) as $file) {
if (!((strpos(strtolower($file), $filter)) === false) || empty($filter)) {
$items[] = preg_replace("#\\\#", "/", $file);
}
}
foreach ($items as $item) {
$photo = new Create_Thumbnail($item);
$photo->createThumbnail();
}
?>

The Create_Thumbnail class...
Code: [Select]
<?php

class Create_Thumbnail
{
private $_photo;
private $_photoBasename;
private $_photoWidth;
private $_photoHeight;
private $_photoType;

private $_resizedPhoto;

private $_thumbFolder;
private $_thumbWidth  = 125;
private $_thumbHeight  = 125;
private $_thumbSuffix  = '_thumb';
private $_thumbnail;

/**
 * Constructor retrieves photo's basename, extension, width, and height.
 */
public function __construct($photo) 
{
$this->_photo  = $photo;
$this->_photoBasename  = pathinfo($this->_photo, PATHINFO_FILENAME);
$this->_extension  = pathinfo($this->_photo, PATHINFO_EXTENSION);
$this->_thumbFolder  = dirname($photo) . '/';
list($this->_photoWidth, $this->_photoHeight, $this->_photoType) = getimagesize($this->_photo);
}

/**
 * Method to resize the original image to a size that is much closer to the desired thumbnail size.
 */
public function resize() 
{
$photoRatio = $this->calculatePhotoRatio();
if ($photoRatio != 1) {
$this->_resizedWidth = round($this->_photoWidth * $photoRatio);
$this->_resizedHeight = round($this->_photoHeight * $photoRatio);
} else {
$this->_resizedWidth = $this->_thumbWidth;
$this->_resizedHeight = $this->_thumbHeight;
}
$resource = $this->createResource($this->_photoType, $this->_photo);
$resized = imagecreatetruecolor($this->_resizedWidth, $this->_resizedHeight);
imagecopyresampled($resized, $resource, 0, 0, 0, 0, $this->_resizedWidth, $this->_resizedHeight, $this->_photoWidth, $this->_photoHeight);
$this->_resizedPhoto = $this->_thumbFolder . $this->_photoBasename . '_resized.' . $this->_extension;
$this->createNewImage($this->_photoType, $resized, $this->_resizedPhoto);
imagedestroy($resource);
imagedestroy($resized);
return $this->_resizedPhoto;
}

/**
 * Method to create the thumbnail.
 */
public function createThumbnail() 
{
$source = $this->resize();
list($width_original, $height_original, $type) = getimagesize($source);
$base_name = pathinfo($source, PATHINFO_FILENAME);
$base_name = str_replace('_resized', '', $base_name);
$extension = pathinfo($source, PATHINFO_EXTENSION);
$source_x = ($width_original / 2) - ($this->_thumbWidth / 2);
$source_y = ($height_original / 2) - ($this->_thumbHeight / 2);
$resource = $this->createResource($type, $source);
$thumb = imagecreatetruecolor($this->_thumbWidth, $this->_thumbHeight);
imagecopyresampled($thumb, $resource, 0, 0, $source_x, $source_y, $this->_thumbWidth, $this->_thumbHeight, $this->_thumbWidth, $this->_thumbHeight);
$this->_thumbnail = $this->_thumbFolder . $base_name . $this->_thumbSuffix . '.' . $extension;
$this->createNewImage($type, $thumb, $this->_thumbnail);
unlink($source);
return $this->_thumbnail;
}

/**
 * Method to create an image resource.
 */
public function createResource($type, $source) 
{
switch ($type) {
case 1:
$resource = imagecreatefromgif($source);
break;
case 2:
$resource = imagecreatefromjpeg($source);
break;
case 3:
$resource = imagecreatefrompng($source);
break;
}
return $resource;
}

/**
 * Method to calculate the photo ratio.
 */
public function calculatePhotoRatio() 
{
if ($this->_photoWidth > $this->_photoHeight) {
$maximumHeight = $this->_thumbHeight;
$photoRatio = $maximumHeight / $this->_photoHeight;
} elseif ($this->_photoWidth < $this->_photoHeight) {
$maximumWidth = $this->_thumbWidth;
$photoRatio = $maximumWidth / $this->_photoWidth;
} else {
$photoRatio = 1;
}
return $photoRatio;
}

/**
 * Method to create a new image.
 */
public function createNewImage($type, $source, $destination) 
{
switch ($type) {
case 1:
if (function_exists('imagegif')) {
imagegif($source, $destination);
} else {
imagejpeg($source, $destination, 50);
}
break;
case 2:
imagejpeg($source, $destination, 100);
break;
case 3:
imagepng($source, $destination);
break;
}
}

}

The php.ini file...
Code: [Select]
file_uploads on
upload_max_filesize = 150M
post_max_size = 150M
max_input_time = -1
max_execution_time = 0
memory_limit = 150M
register_argc_argv = false

I would be needing different picture sizes on different pages on my site but saving different sizes of a single pic is space consuming.

I've heard that it's possible to automatically adjust the size of the picture and found a script that ought to make that possible. Unfortunately, it did not work for me.

Article: PHP Thumbnail Script Using GD http://www.rainbodesign.com/pub/thumbnails/

Here's the code:
Code: [Select]
<?
// Rainbo Design PHP Thumbnail Maker
// Copyright (C) 2005-2010 by Richard L. Trethewey - rick@rainbo.net
// All Rights Reserved
// If you use this script, I'd appreciate a link!
// http://www.rainbodesign.com/pub/

// Defaults
$thumbsize = 150; // Default thumbnail width.
$imagesource = 'images/default_img.jpg'; // Default image file name.
// Set to empty string for no image output on failure.
$error = '';

if (isset($_GET['width'])) { $thumbsize = $_GET['width']; }
if (isset($_GET['src'])) { $imagesource = $_GET['src']; }

$filetype = substr($imagesource,strlen($imagesource)-4,4);
$filetype = strtolower($filetype);

if (file_exists($imagesource)) {

if($filetype == ".gif") $image = @imagecreatefromgif($imagesource);
if($filetype == ".jpg") $image = @imagecreatefromjpeg($imagesource);
if($filetype == ".png") $image = @imagecreatefrompng($imagesource);

$imagewidth = imagesx($image);
$imageheight = imagesy($image);

if ($imagewidth >= $thumbsize) {
$thumbwidth = $thumbsize;
$factor = $thumbsize / $imagewidth;
$thumbheight = floor($imageheight * $factor);
} else {
$thumbwidth = $imagewidth;
$thumbheight = $imageheight;
$factor = 1;
}

// Create a thumbnail-sized GD Image object
$thumb = @imagecreatetruecolor($thumbwidth,$thumbheight);

// bool imagecopyresized ( resource dst_image, resource src_image, int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h )
imagecopyresized($thumb, $image, 0, 0, 0, 0, $thumbwidth, $thumbheight, $imagewidth, $imageheight);

// Send output to user as a jpeg type, regardless of original type
header("Content-type:image/jpeg;");
imagejpeg($thumb);
imagedestroy($image);
imagedestroy($thumb);
} else {
$error = "File $imagesource Not Found";
} // endif file_exists

if ($error != '') {
header('Content-type:text/plain;');
echo($error);
exit;
} // endif $error

?>

And here's a little instruction (which I have followed as well).
Quote

All it takes is replacing the "src" parameter in the <img> tag with the URL for the PHP script, including the parameters "src" which contains the path to the original image file, and "color" to select the color for the font. The script also supports a "width" parameter to specify the width of your thumbnail image. Using that script to display the above image as a thumbnail by setting the "src" attribute to "makeThumb.php?src=slides/slide1.jpg", we get the resulting image shown on the right.



Can anyone please help me with this script or something similar?

Thanks in advance. ^_^

Edit: The problem is that the image is not showing. It appears as if it cannot locate the file source.

Hi everyone, would be grateful if anyone can help me. I recently changed my hosting package and didnt realize that the new package uses PHP 5. There is no option to use an earlier version but my thumbnail script that worked on PHP 4 just shows a red cross where the thumbnail should be. Can anyone tell me why the script below would not work with PHP 5. I have a basic understanding of how scripts work but I am not an expert so if you could make any replies easy to understand I have checked and the new server does have GD library version 2.0.34 installed - not sure if there is anything else I need to check ?
script called: uktn.php
Code: [Select]
<?
$maxwidth = 200;
$maxheight = 200;

$image_path = $_GET['im'];
$ext = explode('.', $image_path);
$i = count($ext)-1;

if ($ext[$i] == 'jpg' || $ext[$i] == 'jpeg' || $ext[$i] == 'JPG' || $ext[$i] == 'JPEG' ) {
    $img = @imagecreatefromjpeg($image_path);
} else if ($ext[$i] == 'png' || $ext[$i] == 'PNG') {
    $img = @imagecreatefrompng($image_path);
} else if ($ext[$i] == 'gif' || $ext[$i] == 'GIF') {
    $img = @imagecreatefromgif($image_path);
}

if ($img) {

    $width = imagesx($img);
    $height = imagesy($img);
    $scale = min($maxwidth/$width, $maxheight/$height);

    if ($scale < 1) {
        $new_width = floor($scale*$width);
        $new_height = floor($scale*$height);
        $tmp_img = imagecreatetruecolor($new_width, $new_height);
        imagecopyresized($tmp_img, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
        imagedestroy($img);
        $img = $tmp_img;
    }
}

if (!$img) {
exit ("You must specify an image!");
}

header("Content-type: image/png");
imagepng($img,'',100);
?>
Many thanks,
Dave

Goal: To have a gallery that downloads images from the folder I previously uploaded to in a previous script.

Bug: When I load the page the thumbnail comes up as broken and when I click on the thumbnail to get the bigger picture it comes up with the following error message:

"Firefox doesn't know how to open this address, because the protocol (c) isn't associated with any program."


<?php
include 'db.inc.php';
//connect to MySQL
$db = mysql_connect(MYSQL_HOST, MYSQL_USER, MYSQL_PASSWORD) or 
    die ('Unable to connect. Check your connection parameters.');
mysql_select_db(MYSQL_DB, $db) or die(mysql_error($db));

//change this path to match your images directory
$dir ='C:/x/xampp/htdocs/images';

//change this path to match your thumbnail directory
$thumbdir = $dir . '/thumbs';
?>
<html>
 <head>
  <title>Welcome to our Photo Gallery</title>
  <style type="text/css">
   th { background-color: #999;}
   .odd_row { background-color: #EEE; }
   .even_row { background-color: #FFF; }
  </style>
 </head>
 <body>
  <p>Click on any image to see it full sized.</p>
  <table style="width:100%;">
   <tr>
    <th>Image</th>
    <th>Caption</th>
    <th>Uploaded By</th>
    <th>Date Uploaded</th>
   </tr>
<?php
//get the thumbs
$result = mysql_query('SELECT * FROM images') or die(mysql_error());

$odd = true;
while ($rows = mysql_fetch_array($result)) {
    echo ($odd == true) ? '<tr class="odd_row">' : '<tr class="even_row">';
    $odd = !$odd; 
    extract($rows);
    echo '<td><a href="' . $dir . '/' . $image_id . '.jpg">';
    echo '<img src="' . $thumbdir . '/' . $image_id . '.jpg">';
    echo '</a></td>';
    echo '<td>' . $image_caption . '</td>';
    echo '<td>' . $image_username . '</td>';
    echo '<td>' . $image_date . '</td>';
    echo '</tr>';
}
?>
  </table>
 </body>
</html>


Any help appreciated.