ImageMagick - 将pdf转换为jpg

Question

With this code, I try to convert an uploaded pdf to a jpg.

$newname = date("U");

$target = "../uploads/";
$temp = "../temp/";

if($_FILES["fileToUpload"]["type"] == "application/pdf") {
print "pdf";
if(move_uploaded_file( $_FILES["fileToUpload"]["tmp_name"], $temp.$_FILES['fileToUpload']['name'])) {
    print "pdf saved<br>";
} else {
    print "pdf not saved<br>";
}
$filename = basename( $_FILES['fileToUpload']['name'], ".pdf");
print "<br>".$filename."<br>";
if(file_exists($temp.$_FILES['fileToUpload']['name'])) {
    print "temp-file exist<br>";
    $konv = "/usr/local/bin/convert -debug 'All' ".$temp.$_FILES['fileToUpload']['name']." ".$target.$newname.".jpg 2>&1";
    print $konv."<br>";
    exec("convert -debug 'All' ".$temp.$_FILES['fileToUpload']['name']." ".$target.$newname.".jpg 2>&1", $output); 
    if ($return == "0") { echo "<br>Image generation sucssesful<br>"; } 
    else { echo "<br>Image generation failed<br>"; } 
    print_r($output);
    foreach ( $output as $file ) 
    print "$file<br>";
} else {
    print "temp-file doesn't exist";
}


}

PDF is saved in temp folder, but the image convertion fail and the only error message I get is a 1.

How do I get more informational error messages?

Answer 1

<?php
$image = new imagick('file.pdf[0]');
$image->setImageFormat('jpg');
header('Content-Type: image/jpeg');
echo $image;
?>

Where [0] is the page number.

pdfinfo will give you the page numbers..

exec('/path/to/pdfinfo '.$afilename.' | awk \'/Pages/ {print $2}\'', $output);