今天，想上传大量图片到论坛，由于图片是单反拍的，体积较大，就写了一个脚本，批量压缩图片。

<?php

if ($handle = opendir("./old")) {

    while (false !== ($file = readdir($handle))) {
        if ($file == "." || $file == "..") {
            continue;
        }
        write("d:/wamp/www/test/old/".$file, "d:/wamp/www/test/new/".$file);
    }

    closedir($handle);
}


function write($old, $new) {
    $maxsize=1000;
    $image = new Imagick($old);
    if($image->getImageHeight() <= $image->getImageWidth())
    {
        $image->resizeImage($maxsize,0,Imagick::FILTER_LANCZOS,1);
    }
    else
    {
        $image->resizeImage(0,$maxsize,Imagick::FILTER_LANCZOS,1);
    }
    $image->setImageCompression(Imagick::COMPRESSION_JPEG);
    $image->setImageCompressionQuality(90);
    $image->stripImage();
    $image->writeImage($new);
    $image->destroy();
}
?>