## Get md5 of files location
$thumb_file_md5 = md5($thumb_file)."_".$width."_".$height."_".$_GET['iar'] ;
$hex_folder = substr($thumb_file_md5, 0, 2).'/' ;
$img_thumb = $cache_dir.$hex_folder.$thumb_file_md5.$image_file_extension ;

// Create a thumb from image
function create_thumb($src, $dest, $width = 0, $height = 0, $deform = false, $no_img = './assets/img/trans.gif' ) {

## Make directory
@mkdir(dirname($dest)) ;

## Get infos on file with exif
list($width_original, $height_original, $image_mime) = @getimagesize($src);

// Init w & h
$_w = ( $width ? $width : $width_original ) ;
$_h = ( $height ? $height : $height_original ) ;

// If error
if ( ! $image_mime ) {
$src = $no_img ;
list($width_original, $height_original, $image_mime) = getimagesize($src);
}

## Detect Portait( => 0) / paysage ( => 1)
if ( $width_original <= $height_original ) {
$image_type = 0 ;
} else {
$image_type = 1 ;
}

## If width or height is empty => auto
if ( $_w == 0 &amp;&amp; $_h > 0 ) {
$_w = $width_original * ($_h / $height_original ) ;
} else if ( $width > 0 &amp;&amp; $height == 0 ) {
$_h = $height_original * ($_w / $width_original ) ;
} else {
$is_error = true ;
}

## Define best size to thumb depending params
if ( $image_type == 0 ) {
$best_height = $_h ;
if ( $height_original ) $best_width = (int) ( $width_original * ($_h / $height_original ) ) ;
} else {
$best_width = $_w ;
if ( $width_original ) $best_height = (int) ( $height_original * ( $_w / $width_original ) ) ;
}

## If picture is little than wanted => don't stretch it, juste create a standard thumbnail
if ( $width_original < $_w &amp;&amp; $height_original < $_h ) {
$best_width = $width_original ;
$best_height = $height_original ;
}

## If 'iar' is setted => do desired stretching and no more
if ( $deform == "1" ) {
$best_width = (int) $width ;
$best_height = (int) $height ;
}

// set image type, blending and set functions for gif, jpeg and png
switch($image_mime){
case IMAGETYPE_PNG: $img = 'png'; $blending = false; break;
case IMAGETYPE_GIF: $img = 'gif'; $blending = true; break;
case IMAGETYPE_JPEG: $img = 'jpeg'; break;
}
$imagecreate = "imagecreatefrom$img";
$imagesave = "image$img";

// initialize image from the file
$image1 = $imagecreate($src);

// create a new true color image with dimensions $width2 and $height2
$image2 = imagecreatetruecolor($best_width, $best_height);

// preserve transparency for PNG and GIF images
if ($img == 'png' || $img == 'gif'){
// allocate a color for thumbnail
$background = imagecolorallocate($image2, 0, 0, 0);
// define a color as transparent
imagecolortransparent($image2, $background);
// set the blending mode for thumbnail
imagealphablending($image2, $blending);
// set the flag to save alpha channel
imagesavealpha($image2, true);
}

// save thumbnail image to the file
imagecopyresampled($image2, $image1, 0, 0, 0, 0, $best_width, $best_height, $width_original, $height_original);
$imagesave($image2, $dest, ($img == 'jpeg' ? 100 : true));
ImageDestroy($image2);
}

#@
#@ If thumbnail doesn't exists create it !
#@