mass_png_to_gif_with_transparency.php

<?php
$from = 'items'; // images PNG folder
$to = 'gif'; // empty folder
function png2gif($pngs, $background = array(255, 255, 255), $dest = 'gif')
{
    // by WebReflection
    foreach($pngs as $png){
        $size = getimagesize($png);
        $img = imagecreatefrompng($png);
        $image = imagecreatetruecolor($width = $size[0], $height = $size[1]);
        imagefill($image, 0, 0, $bgcolor = imagecolorallocate($image, $background[0], $background[1], $background[2]));
        imagecopyresampled($image, $img, 0, 0, 0, 0, $width, $height, $width, $height);
        imagecolortransparent($image, $bgcolor);
        imagegif($image, str_ireplace('.png', '.gif', $dest.DIRECTORY_SEPARATOR.basename($png)), 100);
        imagedestroy($image);
    }
}
png2gif(glob($from . "/*.png"), $background = array(255, 255, 255), $to);

If you know, pls help me: Sybio/ImageWorkshop#95