attempting to use imagemagick, blank page

Question

So today after snooping around on stackoverflow I found out about imagemagick and it looks awesome. Keep in mind I just discovered this today and I've been messing around trying to get it work for me for a couple hours but to no avail, so I could really use some guidance.

I asked my hosting company and I checked the terminal and I do have it.

Through PuTTY I ran:

whereis convert

Which spit me out:

convert: /usr/bin/convert /usr/share/man/man1/convert.1.gz

And then to double check:

/usr/bin/convert --version

Which gave me:

Version: ImageMagick 6.7.2-7 2015-07-29 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2011 ImageMagick Studio LLC
Features: Open MP

So in my public_html I created a file called test.php in which I put:

<?php
    try
    {
        $cmd = "public_html/account/archives/emails/2015/November-Email.pdf";
        exec("usr/bin/convert $cmd");
    }
    catch(Exception $e)
    {
        die('Error when creating a file: ' . $e->getMessage());
    }
?>

When I run test.php it just shows a blank screen so clearly somethings wrong as not even the Error message is showing.

Answer 1

You do not have an output file name. exec() will not display anything but system() will in certain circumstances

exec("/usr/bin/convert -version ) will not display anything system("/usr/bin/convert -version ) SHOULD display the version

You may be able to just use convert depending on your setup.

The path to your image can be relative.

• in a filename :(

You will probably want to add a density to the command to control the pdf quality.

Give this a try:

 <?php 
    $array=array(); 
    echo "<pre>"; 
    $cmd = "public/html/account/archives/emails/2015/November-Email.pdf";
    exec("usr/bin/convert -density 300 $cmd output.jpg 2>&1", $array);  
    echo "<br>".print_r($array)."<br>";  
    echo "</pre>"; 
    ?>