将动态PDF转换为Imagemagick并转换为PNG

Question

我需要从动态（数据库驱动）pdf创建缩略图。过去我已经使用过以下脚本的变体，但现在看起来并不适合我（页面刚刚挂起）。

<?php 
require_once('./template/all_includes.php'); 

$descriptorspec = array(
    0 => array("pipe", "r"), // stdin is a pipe that the child will read from 
    1 => array("pipe", "w"), // stdout is a pipe that the child will write to 
    2 => array("pipe", "w") // stderr is a file to write to 
); 

$cwd = '/tmp'; 
$env = array('asdfadf' => '193'); 

$convert = "convert pdf:- png:-"; 
$process = proc_open($convert, $descriptorspec, $pipes, $cwd, $env); 

    fwrite($pipes[0], 'php /var/www/html/domain.co.uk/store/pdf.php'); 
    fclose($pipes[0]); 

    while(!feof($pipes[1])) $im .= fread($pipes[1], 1024); 
    fclose($pipes[1]); 

    $return_value = proc_close($process); 

header("Content-Type: image/png"); 
echo $im; 

    ?> 

有人能帮我解决这个问题吗？非常感谢:)

Answer 1

Magick可以本地打开PDF文件：

$im = new MagickWand('file.pdf[3]'); // open page 3 of the PDF 
$png = $im->whateverTheMethodIsForPNG();