creating thumbnails from uploaded images

unistake · October 26, 2010

Hi all,

Could someone help me add a thumbnail script to the below that works on scaling it down to 200px x 133px.

I guess it is not that hard.

<?php
$destination='aircraft/'.$reg."1.jpg";
$temp_file = $_FILES['image']['tmp_name'];
move_uploaded_file($temp_file,$destination);
?>

Thanks

scorponok · October 26, 2010

You could add the thumbnail script into the images file i have code here for you to look at. It is actually rather difficult.

<?php
/*************************************************
* Micro Photo Gallery
*
* Version: 1.0
* Date: 2007-04-05
*
* Usage:
* Just copy these files into your image folder
*
****************************************************/

$columns     = 5;
$thmb_width  = 120;
$thmb_height = 80;

function resizeImage($originalImage,$toWidth,$toHeight){
    
    // Get the original geometry and calculate scales
    list($width, $height) = getimagesize($originalImage);
    $xscale=$width/$toWidth;
    $yscale=$height/$toHeight;
    
    // Recalculate new size with default ratio
    if ($yscale>$xscale){
        $new_width = round($width * (1/$yscale));
        $new_height = round($height * (1/$yscale));
    }
    else {
        $new_width = round($width * (1/$xscale));
        $new_height = round($height * (1/$xscale));
    }
    // Resize the original image
    $imageResized = imagecreatetruecolor($new_width, $new_height);
    $imageTmp     = imagecreatefromjpeg ($originalImage);
    imagecopyresampled($imageResized, $imageTmp, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

    return $imageResized;
} 

function generateThumbnails(){
global $thmb_width,$thmb_height;

// Open the actual directory
if ($handle = opendir(".")) {
	// Read all file from the actual directory
	while ($file = readdir($handle))  {
		// Check whether tha actual item is a valid file
		if (is_file($file)){
			// Check whether the actual image is a thumbnail
      		if (strpos($file,'_th.jpg')){
      			$isThumb = true;
      		} else {
	      		$isThumb = false;
	      	}
      	
      		if (!$isThumb) {
	      		// Process the file string
      			$dirName  = substr($file,0,strpos($file,basename($file)));
      			if (strlen($dirName) < 1) $dirName = '.';
      			$fileName = basename($file);
      			$fileMain = substr($fileName,0,strrpos($fileName,'.'));
      			$extName  = substr($fileName,strrpos($fileName,'.'),
      								strlen($fileName)-strrpos($fileName,'.'));
  					
      			// Check if the actual file is a jpeg image
      			if (($extName == '.jpg') || ($extName == '.jpeg')){
		    		$thmbFile = $dirName.'/'.$fileMain.'_th.jpg';
		    		// If a thumbnail dosn't exists tahn create a new one
		    		if (!file_exists($thmbFile)){
			    		imagejpeg(resizeImage($file,$thmb_width,$thmb_height),$thmbFile,80);
			    	}
				}
      		} 
   		}
   		}
}

}

function getNormalImage($file){
$base = substr($file,0,strrpos($file,'_th.jpg'));
if (file_exists($base.'.jpg')) return $base.'.jpg';
elseif (file_exists($base.'.jpeg')) return $base.'.jpeg';
else return "";
}

function displayPhotos(){
global $columns;

generateThumbnails();
$act = 0;
// Open the actual directory
if ($handle = opendir(".")) {
	// Read all file from the actual directory
	while ($file = readdir($handle))  {
		// Check whether tha actual item is a valid file
		if (is_file($file)){
			// Check whether the actual image is a thumbnail
      		if (strpos($file,'_th.jpg')){
				++$act;
				if ($act > $columns) {
					echo '</tr><tr><td class="photo"><a href="'.getNormalImage($file).'"><img src="'.$file.'" alt="'.$file.'"/></a></td>';	
					$act = 1;
				} else {
					echo '<td class="photo"><a href="'.getNormalImage($file).'"><img src="'.$file.'" alt="'.$file.'"/></a></td>';	
				}
      			
      		}
      	}
	}
}	
}

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<head>
   <title>Micro Photo Gallery</title>
   <link href="style/thumbs.css" rel="stylesheet" type="text/css" />
</head>
<body>
  <div id="main">
    <div class="caption">Micro Photo Gallery</div>
      <table align="center"><tr>     
    		<?php displayPhotos(); ?>
      </table>		
    		
<div id="source">Micro Photo Gallery 1.0</div>
  </div>
</body>

If you understand anything at all about PHP/Images you should be able to find what you are looking for in here

unistake · October 26, 2010

Thanks for that, just what I was after.

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creating thumbnails from uploaded images

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