Server down when trying to save more than one image using Imagick and PHP

Question

I have been stumbling over this for a couple of days. I have an imagick object $img that reads a pdf of two pages, in a webservice. I am trying to save each page as jpg image.

for($i = 0;$i < $num_pages; $i++){
   file_put_contents(logfile,"index = ".$i." \r\n\r\n",FILE_APPEND);
   $img->setIteratorIndex($i);
   $img->writeImage('workorders/'.$jobSFID.$i.".jpg");
}

file_put_contents(logfile,"test 7 \r\n\r\n",FILE_APPEND);

When I remove the loop and save one page only... all goes well. But with the loop, saving the two pages, it breaks down, never reaches test 7 logging statement, and gives 503 server temporarily unavailable some times, and other times 502 proxy error reading from remote server.

Answer 1

There is likely to be another problem with your code, that turning on error reporting, or looking in the appropriate log file will reveal, however your code probably doesn't do quite what you want it to do.

Altough setting the "iteratorIndex" affects which image is current in a sequence of images, it doesn't actually separate that particular image out.

It should be much more reliable to separate a single image with Imagick::getImage to ensure that only a single page is written.

for($i = 0; $i < $num_pages; $i++){
   $img->setIteratorIndex($i);
   $pageImage = $img->getImage();
   $pageImage->writeImage('workorders/'.$jobSFID.$i.".jpg");
}