参考资料:
http://www.php.net/manual/zh/book.imagick.php

前提

$im = new Imagick("test.psd");

获取图层数目

$num_layers = $im->getNumberImages();

获取所有参数:

for ($i = 0, $num_layers = $im->getNumberImages(); $i < $num_layers; ++$i) {

    $im->setImageIndex($i);         //this

    $im->setIteratorIndex($i);      //or this is kinda redundant

    $pagedata=$im->getImagePage();

    //print("x,y: " + $pagedata["x"].", ".$pagedata["y"]."<br/>\n");

    //print("w,h: " + $pagedata["width"].", ".$pagedata["height"]."<br/>\n");

 

    foreach($im->getImageProperties("*") as $k => $v) print("$k: $v<br/>\n"); 

 

    //export layer

    //$im->writeImage('layer_' . $i . '.png'); //导出所有图层到单独的png文件

}