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< ? php
/*
MINIGAL NANO
- A PHP / HTML / CSS based image gallery script
This script and included files are subject to licensing from Creative Commons ( http :// creativecommons . org / licenses / by - sa / 2.5 / )
You may use , edit and redistribute this script , as long as you pay tribute to the original author by NOT removing the linkback to www . minigal . dk ( " Powered by MiniGal Nano x.x.x " )
MiniGal Nano is created by Thomas Rybak
Copyright 2010 by Thomas Rybak
Support : www . minigal . dk
Community : www . minigal . dk / forum
Please enjoy this free script !
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Version 0.3 . 5 modified by Sebastien SAUVAGE ( sebsauvage . net ) :
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- Added thumbnail cache ( reduces server CPU load , server bandwith and speeds up client page display ) .
- Thumbnails are now always in JPEG even if the source image is PNG or GIF .
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USAGE EXAMPLE :
File : createthumb . php
Example : < img src = " createthumb.php?filename=photo.jpg&width=100&height=100 " >
*/
// error_reporting(E_ALL);
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error_reporting ( 0 );
/*
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if ( preg_match ( " /.jpg $ |.jpeg $ /i " , $_GET [ 'filename' ])) header ( 'Content-type: image/jpeg' );
if ( preg_match ( " /.gif $ /i " , $_GET [ 'filename' ])) header ( 'Content-type: image/gif' );
if ( preg_match ( " /.png $ /i " , $_GET [ 'filename' ])) header ( 'Content-type: image/png' );
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*/
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// flip functions from http://stackoverflow.com/questions/8232722/how-to-flip-part-of-an-image-horizontal-with-php-gd
function flipVertical ( & $img ) {
$size_x = imagesx ( $img );
$size_y = imagesy ( $img );
$temp = imagecreatetruecolor ( $size_x , $size_y );
$x = imagecopyresampled ( $temp , $img , 0 , 0 , 0 , ( $size_y - 1 ), $size_x , $size_y , $size_x , 0 - $size_y );
if ( $x )
{
$img = $temp ;
} else {
die ( " Unable to flip image " );
}
}
function flipHorizontal ( & $img ) {
$size_x = imagesx ( $img );
$size_y = imagesy ( $img );
$temp = imagecreatetruecolor ( $size_x , $size_y );
$x = imagecopyresampled ( $temp , $img , 0 , 0 , ( $size_x - 1 ), 0 , $size_x , $size_y , 0 - $size_x , $size_y );
if ( $x )
{
$img = $temp ;
} else {
die ( " Unable to flip image " );
}
}
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function str_split_php4 ( $text , $split = 1 ) {
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// place each character of the string into and array
$array = array ();
for ( $i = 0 ; $i < strlen ( $text ); )
{
$key = NULL ;
for ( $j = 0 ; $j < $split ; $j ++ , $i ++ )
{
$key .= $text [ $i ];
}
array_push ( $array , $key );
}
return $array ;
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}
function sanitize ( $name )
{
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// Sanitize image filename (taken from http://iamcam.wordpress.com/2007/03/20/clean-file-names-using-php-preg_replace/ )
$fname = $name ;
$replace = " _ " ;
$pattern = " /([[:alnum:]_ \ .-]*)/ " ;
$fname = str_replace ( str_split_php4 ( preg_replace ( $pattern , $replace , $fname )), $replace , $fname );
return $fname ;
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}
// Make sure the "thumbs" directory exists.
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if ( ! is_dir ( 'thumbs' ))
{
mkdir ( 'thumbs' , 0700 );
}
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// Thumbnail file name and path.
// (We always put thumbnails in jpg for simplification)
$thumbname = 'thumbs/' . sanitize ( $_GET [ 'filename' ]) . '.jpg' ;
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if ( file_exists ( $thumbname )) // If thumbnail exists, serve it.
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{
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$fd = fopen ( $thumbname , " r " );
$cacheContent = fread ( $fd , filesize ( $thumbname ));
fclose ( $fd );
header ( 'Content-type: image/jpeg' );
echo ( $cacheContent );
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}
else // otherwise, generate thumbnail, send it and save it to file.
{
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// Display error image if file isn't found
if ( ! is_file ( $_GET [ 'filename' ])) {
header ( 'Content-type: image/jpeg' );
$errorimage = ImageCreateFromJPEG ( 'images/questionmark.jpg' );
ImageJPEG ( $errorimage , null , 90 );
}
// Display error image if file exists, but can't be opened
if ( substr ( decoct ( fileperms ( $_GET [ 'filename' ])), - 1 , strlen ( fileperms ( $_GET [ 'filename' ]))) < 4 OR substr ( decoct ( fileperms ( $_GET [ 'filename' ])), - 3 , 1 ) < 4 ) {
header ( 'Content-type: image/jpeg' );
$errorimage = ImageCreateFromJPEG ( 'images/cannotopen.jpg' );
ImageJPEG ( $errorimage , null , 90 );
}
// Define variables
$target = " " ;
$xoord = 0 ;
$yoord = 0 ;
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if ( $_GET [ 'size' ] == " " )
{
$_GET [ 'size' ] = 120 ;
}
$imgsize = GetImageSize ( $_GET [ 'filename' ]);
$width = $imgsize [ 0 ];
$height = $imgsize [ 1 ];
if ( $width > $height ) // If the width is greater than the height it’ s a horizontal picture
{
$xoord = ceil (( $width - $height ) / 2 );
$width = $height ; // Then we read a square frame that equals the width
}
else
{
$yoord = ceil (( $height - $width ) / 2 );
$height = $width ;
}
// Rotate JPG pictures
if ( preg_match ( " /.jpg $ |.jpeg $ /i " , $_GET [ 'filename' ]))
{
if ( function_exists ( 'exif_read_data' ) && function_exists ( 'imagerotate' ))
{
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$exif = exif_read_data ( $_GET [ 'filename' ], 0 , true );
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$ort = $exif [ 'IFD0' ][ 'Orientation' ];
$degrees = 0 ;
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switch ( $ort )
{
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case 3 : // 180 rotate right
$degrees = 180 ;
break ;
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case 6 : // 90 rotate right
$degrees = 270 ;
break ;
case 8 : // 90 rotate left
$degrees = 90 ;
break ;
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case 2 : // flip vertical
$flip = 'vertical' ;
break ;
// see http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/ for more info on orientation
case 7 : // flipped
$degrees = 90 ;
$flip = 'vertical' ;
break ;
case 5 : // flipped
$degrees = 270 ;
$flip = 'vertical' ;
break ;
case 4 : // flipped
$degrees = 180 ;
$flip = 'vertical' ;
break ;
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}
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}
}
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$target = ImageCreatetruecolor ( $_GET [ 'size' ], $_GET [ 'size' ]);
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//if the picture can be transparent, add a white background instead a black
if ( preg_match ( " /.gif $ /i " , $_GET [ 'filename' ]) || preg_match ( " /.png $ /i " , $_GET [ 'filename' ]))
{
$backgroundColor = imagecolorallocate ( $target , 255 , 255 , 255 );
imagefill ( $target , 0 , 0 , $backgroundColor );
}
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if ( preg_match ( " /.jpg $ /i " , $_GET [ 'filename' ])) $source = ImageCreateFromJPEG ( $_GET [ 'filename' ]);
if ( preg_match ( " /.gif $ /i " , $_GET [ 'filename' ])) $source = ImageCreateFromGIF ( $_GET [ 'filename' ]);
if ( preg_match ( " /.png $ /i " , $_GET [ 'filename' ])) $source = ImageCreateFromPNG ( $_GET [ 'filename' ]);
imagecopyresampled ( $target , $source , 0 , 0 , $xoord , $yoord , $_GET [ 'size' ], $_GET [ 'size' ], $width , $height );
imagedestroy ( $source );
//if (preg_match("/.jpg$/i", $_GET['filename'])) ImageJPEG($target,null,90);
//if (preg_match("/.gif$/i", $_GET['filename'])) ImageGIF($target,null,90);
//if (preg_match("/.png$/i", $_GET['filename'])) ImageJPEG($target,null,90); // Using ImageJPEG on purpose
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//proper rotation by jan niggemann
if ( $degrees != 0 )
{
$target = imagerotate ( $target , $degrees , 0 );
}
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ob_start (); // Start output buffering.
header ( 'Content-type: image/jpeg' ); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
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//proper mirror (aka flip) by jan niggemann
if ( $flip == 'vertical' )
{
//only in php >= 5.5.0 ImageJPEG(imageflip($target, IMG_FLIP_VERTICAL),null,80);
flipVertical ( $target );
flipHorizontal ( $target );
flipVertical ( $target );
ImageJPEG ( $target , null , 80 );
} else {
ImageJPEG ( $target , null , 80 );
}
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imagedestroy ( $target );
$cachedImage = ob_get_contents (); // Get the buffer content.
ob_end_flush (); // End buffering
$fd = fopen ( $thumbname , " w " ); // Save buffer to disk
if ( $fd )
{
fwrite ( $fd , $cachedImage );
fclose ( $fd );
}
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}
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?>