<?PHP



###########################################

#

# script to take all the images in a folder

# and resample them.

# ---------------------------

#

#  it will loop through all the images in a

#  folder and check to see if width is > 800

#  and/or height > 600 . If the image meets

# either of those criteria, the script will

# resample the image to fall within the

# guidelines AND will remake the corresponding

# thumbnail.

#

############################################

if ($handle = opendir('pics'))

{

while (false !== ($file = readdir($handle)))

{

if ($file != "." && $file != ".." && $file != ".DS_Store")

{

$off_site = 'pics/' . $file;



$src = imagecreatefromjpeg($off_site);

$width = imagesx($src);

$height = imagesy($src);



// check that width is 800 or less

if ($width > 800)

{

$ratio_w = 800/$width;

} else {

$ratio_w = 1;

}



// check if height is 600 or less

if ($height > 600)

{

$ratio_h = 600/$height;

} else {

$ratio_h = 1;

}



// determine which ratio creates the smaller image

if ($ratio_w <= $ratio_h)

{

$aspect_ratio = $ratio_w;

} else {

$aspect_ratio = $ratio_h;

}



// new resizing code

$new_w = abs($width * $aspect_ratio);

$new_h = abs($height * $aspect_ratio);

$size = $new_h;



$aspect_ratio = $height/$width;



//start resizing

if ($height <= $size) {

$new_w = $width;

$new_h = $height;

} else {

$new_h = $size;

$new_w = abs($new_h / $aspect_ratio);

}





$img = imagecreatetruecolor ($new_w,$new_h);



//save image

imagecopyresampled ($img,$src,0,0,0,0,$new_w,$new_h,$width,$height);



imagejpeg($img, $off_site, 90);

imagedestroy($img);



}

}

closedir($handle);

}