foliogallery.php

<!--
	folioGallery v1.3 - 2014-05-01
	(c) 2014 Harry Ghazanian - foliopages.com/php-jquery-ajax-photo-gallery-no-database
	This content is released under the http://www.opensource.org/licenses/mit-license.php MIT License.
-->
<?php
/***** gallery settings *****/
$mainFolder          = 'albums'; // main folder that holds albums - this folder resides on root directory of your domain
$album_page_url      = $_SERVER['PHP_SELF']; // url of page where gallery/albums are located 
$no_thumb            = 'foliogallery/noimg.png';  // show this when no thumbnail exists 
$extensions          = array("jpg","png","gif","JPG","PNG","GIF"); // allowed extensions in photo gallery 
$itemsPerPage        = '12';    // number of images per page if not already specified in ajax mode 
$thumb_width         = '150';   // width of thumbnails in pixels
$sort_albums_by_date = FALSE;    // TRUE will sort albums by upload date, FALSE will sort albums by name 
$sort_images_by_date = TRUE;    // TRUE will sort thumbs by creation date, FALSE will sort images by name 
$random_thumbs       = TRUE;    // TRUE will display random thumbnails, FALSE will display the first image from thumbs folders
$show_captions       = TRUE;    // TRUE will display file names as captions on thumbs inside albums, FALSE will display no captions
$num_captions_chars  = '20';    // number of characters displayed in album and thumb captions
/***** end gallery settings *****/

$numPerPage = (!empty($_REQUEST['numperpage']) ? (int)$_REQUEST['numperpage'] : $itemsPerPage);
$fullAlbum  = (!empty($_REQUEST['fullalbum']) ? 1 : 0);
 
// function to create thumbnails from images
function make_thumb($folder,$file,$dest,$thumb_width) {

	$ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
	
	switch($ext)
	{
		case "jpg":
		$source_image = imagecreatefromjpeg($folder.'/'.$file);
		break;
		
		case "jpeg":
		$source_image = imagecreatefromjpeg($folder.'/'.$file);
		break;
		
		case "png":
		$source_image = imagecreatefrompng($folder.'/'.$file);
		break;
		
		case "gif":
		$source_image = imagecreatefromgif($folder.'/'.$file);
		break;
	}	
	
	$width = imagesx($source_image);
	$height = imagesy($source_image);
	
	if($width < $thumb_width) // if original image is smaller don't resize it
	{
		$thumb_width = $width;
		$thumb_height = $height;
	}
	else
	{
		$thumb_height = floor($height*($thumb_width/$width));
	}
	
	$virtual_image = imagecreatetruecolor($thumb_width,$thumb_height);
	
	if($ext == "gif" or $ext == "png") // preserve transparency
	{
		imagecolortransparent($virtual_image, imagecolorallocatealpha($virtual_image, 0, 0, 0, 127));
		imagealphablending($virtual_image, false);
		imagesavealpha($virtual_image, true);
    }
	
	imagecopyresampled($virtual_image,$source_image,0,0,0,0,$thumb_width,$thumb_height,$width,$height);
	
	switch($ext)
	{
	    case 'jpg': imagejpeg($virtual_image, $dest,80); break;
		case 'jpeg': imagejpeg($virtual_image, $dest,80); break;
		case 'gif': imagegif($virtual_image, $dest); break;
		case 'png': imagepng($virtual_image, $dest); break;
    }

	imagedestroy($virtual_image); 
	imagedestroy($source_image);
	
}

// return array sorted by date or name
function sort_array(&$array,$dir,$sort_by_date) { // array argument must be passed as reference
	
	if($sort_by_date)
	{
		foreach ($array as $key=>$item) 
		{
			$stat_items = stat($dir .'/'. $item);
			$item_time[$key] = $stat_items['ctime'];
		}
		return array_multisort($item_time, SORT_DESC, $array); 
	}	
	else
	{
		return usort($array, 'strnatcasecmp');
	}	

}

// display pagination
function paginate_array($numPages,$urlVars,$alb,$currentPage) {
        
   $html = '';
   
   if ($numPages > 1) 
   {
       if ($currentPage > 1)
	   {
	   	   $html .=  "<div id='nextPage'>";
	       $prevPage = $currentPage - 1;
	       $html .= ' <a class="pag prev" rel="'.$alb.'" rev="'.$prevPage.'" href="?'.$urlVars.'p='.$prevPage.'">Last Page</a> ';
	   	   $html .=  '</div>';
	   }	   
	   
	   if ($currentPage != $numPages)
	   {
	   	   $html .=  "<div id='prevPage'>";
           $nextPage = $currentPage + 1;	
		   $html .= ' <a class="pag next" rel="'.$alb.'" rev="'.$nextPage.'" href="?'.$urlVars.'p='.$nextPage.'">Next Page</a>';
	   	   $html .=  '</div>';
	   }	  	 

	   for( $i=0; $i < $numPages; $i++ )
	   {
           $p = $i + 1;
		   $class = ($p==$currentPage ? 'current-paginate' : 'paginate'); 
		   $html .= '<a rel="'.$alb.'" rev="'.$p.'" class="'.$class.' pag" href="?'.$urlVars.'p='.$p.'">'.$p.'</a>';	  
	   }
   
   }
   
   return $html;

}
?>

<div class="fg">

<?php
if (empty($_REQUEST['album'])) // if no album requested, show all albums
{		
	
	$albums = array_diff(scandir($mainFolder), array('..', '.'));
	$numAlbums = count($albums);
	 
	if($numAlbums == 0) 
	{ ?>
		
		<div class="titlebar"><p>There are currently no albums</p></div>
    
	<?php
	}
	else
	{
		sort_array($albums,$mainFolder,$sort_albums_by_date); // rearrange array either by date or name
		$numPages = ceil( $numAlbums / $numPerPage );
		
		if(isset($_REQUEST['p']))
		 {
		 	$currentPage = ((int)$_REQUEST['p'] > $numPages ? $numPages : (int)$_REQUEST['p']); 
         } 
		 else 
		 {
		 	$currentPage=1;
         }
		
		$start = ($currentPage * $numPerPage) - $numPerPage; ?>
	     
		<div class="p10-lr">
        	<span class="title">Photo Gallery</span> - <?php echo $numAlbums; ?> albums
        </div>
	  
        <div class="clear"></div>
	  	 
		<?php 			 
	    for( $i=$start; $i<$start + $numPerPage; $i++ )
		{
	  						
			if(isset($albums[$i])) 
			{  
				$thumb_pool = glob($mainFolder.'/'.$albums[$i].'/thumbs/*{.'.implode(",", $extensions).'}', GLOB_BRACE);
				
				if (count($thumb_pool) == 0)
				{ 
					$album_thumb = $no_thumb;
				}
				else
				{	
					$album_thumb = ($random_thumbs ? $thumb_pool[array_rand($thumb_pool)] : $thumb_pool[0]); // display a random thumb or the 1st thumb					
				} ?>
			 		 			 
				<div class="thumb-wrapper">
					<div class="thumb">
					   <a class="showAlb" rel="<?php echo $albums[$i]; ?>" href="<?php echo $_SERVER['PHP_SELF']; ?>?album=<?php echo urlencode($albums[$i]); ?>">
					     <img src="<?php echo $album_thumb; ?>" alt="<?php echo $albums[$i]; ?>" /> 
					   </a>	
					</div>
					<div class="caption"><?php echo substr($albums[$i],0,$num_captions_chars); ?></div>
				</div>
	
			<?php
			}
		
		}
		?>
	      
		 <div class="clear"></div>
  
         <div align="center" class="paginate-wrapper">
        	<?php
			$urlVars = "";
			$alb = "";
            echo paginate_array($numPages,$urlVars,$alb,$currentPage);
			?>
         </div>   
    <?php
	}

} 
else //display photos in album 
{

	$album = $mainFolder.'/'.$_REQUEST['album']; 
	$files = array_diff(scandir($album), array('..', '.','thumbs'));
	$numFiles = count($files); ?>
	 
	<div class="p10-lr">
		<?php if($fullAlbum==1) { ?>
			<span class="title"><a href="<?php echo $album_page_url; ?>" class="refresh">Albums</a></span>
			<span class="title">&raquo;</span>
		<?php } ?>
		<span class="title"><?php echo $_REQUEST['album']; ?></span> - <?php echo $numFiles; ?> images
	</div>  
	   
	<div class="clear"></div>
	
	<?php
	if($numFiles == 0)
	{ ?>
	    
		 <div class="p10-lr"><p>There are no images in this album.</p></div>
	
	<?php
	}
	else	
	{			
		sort_array($files,$album,$sort_images_by_date); // rearrange array either by date or name
		$numPages = ceil( $numFiles / $numPerPage );
		
		if(isset($_REQUEST['p']))
		{
		 	$currentPage = ((int)$_REQUEST['p'] > $numPages ? $numPages : (int)$_REQUEST['p']);
		} 
		 else
		{
		 	$currentPage=1;
		}
		 			 
		$start = ($currentPage * $numPerPage) - $numPerPage;
		
		if (!is_dir($album.'/thumbs')) 
		{
			mkdir($album.'/thumbs');
			chmod($album.'/thumbs', 0777);
			//chown($album.'/thumbs', 'apache'); 
		}	 	

		for( $i=0; $i <= $numFiles; $i++ )
		{   
			if(isset($files[$i]) && is_file($album .'/'. $files[$i]))
			{   		    
				$ext = strtolower(pathinfo($files[$i], PATHINFO_EXTENSION));
				$caption = substr($files[$i], 0, -(strlen($ext)+1));
					
				if(in_array($ext, $extensions)) 
				{  				  					   
					$thumb = $album.'/thumbs/'.$files[$i];
				   
					if($i>=$start && $i<$start + $numPerPage) { 

							if (!file_exists($thumb)) {
								make_thumb($album,$files[$i],$thumb,$thumb_width); 
							}	   
 ?>
					<div class="thumb-wrapper">
						<div class="thumb">
							<a href="<?php echo $album; ?>/<?php echo $files[$i]; ?>" title="<?php echo $files[$i]; ?>" class="albumpix">
								<img src="<?php echo $thumb; ?>" alt="<?php echo $files[$i]; ?>" />
							</a>
						</div> 
						<?php if($show_captions) { ?><div class="caption"><?php echo substr($caption,0,$num_captions_chars); ?></div><?php } ?> 

					<?php 
					}

				if($i>=$start && $i<$start + $numPerPage) { ?></div><?php } }
			
			} 
			
		} ?> 
	
		<div class="clear"></div>
		  
		<div align="center" class="paginate-wrapper">
			<?php	 
			$urlVars = "album=".urlencode($_REQUEST['album'])."&amp;";
			$alb = $_REQUEST['album'];
			echo paginate_array($numPages,$urlVars,$alb,$currentPage);
			?>
		</div>
	 
	<?php	 
	} // end if numFiles not 0	 

}
?>
</div>