仅使用Imagick为第一页创建ONLINE PDF缩略图

Question

I tried to make a thumbnail of a pdf file which is hosted on another server. My current code is:

<?php
$im = new imagick("http://www.d3publisher.us/Walkthroughs/Naruto_NC_3_DS.pdf");
$im->setImageFormat('jpg');
header('Content-Type: image/jpeg');
echo $im;
?>

The problem is that code is only generating thumbnail for LAST PAGE of the pdf file. How can I make a thumbnail for first page only? I tried to add [0] at the imagick line.

$im = new imagick("http://www.d3publisher.us/Walkthroughs/Naruto_NC_3_DS.pdf[0]");

but it didn't work. It only work for local pdf file, i.e:

$im = new imagick("my-pdf-file.pdf[0]");

Please help me solve this problem.. Thanks..

Answer 1

You'll need to reset the active image to the first page. This can be done with Imagick::setIteratorIndex.

<?php
$im = new imagick("http://www.d3publisher.us/Walkthroughs/Naruto_NC_3_DS.pdf");
$im->setIteratorIndex(0);
$im->setImageFormat('jpg');
header('Content-Type: image/jpeg');
echo $im;
?>