function crop_media($image_media, $width, $height)
{
if (empty($image_media)) {
return;
}
list($image_path, $modified_path, $modified_media) = _media_filenames($image_media, '-crop-' . $width . 'x' . $height);
if (!file_exists($image_path)) {
return;
}
if (!file_exists($modified_path) || filemtime($modified_path) < filemtime($image_path)) {
$image = new GDImage($image_path);
// preserve aspect ratio
$old_width = (double) $image->width;
$old_height = (double) $image->height;
$old_ratio = $old_width / $old_height;
$new_width = (double) $width;
$new_height = (double) $height;
$new_ratio = $width / $height;
// figure out whether to keep width or height.
if ($old_ratio < $new_ratio) {
$image->resize($width, 0, false);
$crop = ($image->height - $height) / 2;
$image->crop(0, $crop, $width, $crop + $height);
} else {
if ($old_ratio > $new_ratio) {
$image->resize(0, $height, false);
$crop = ($image->width - $width) / 2;
$image->crop($crop, 0, $crop + $width, $height);
}
}
// end preserve aspect ratio
$image->save($modified_path);
}
return $modified_media;
}