从PHP调用时PhantomJS无法渲染

Question

I have a one-liner that generates a PDF from an HTML file:

$my_path = "/path/to/phantomjs/and/generate-pdf.js";
$output  = shell_exec("cd $my_path && phantomjs generate-pdf.js");

I can run this command successfully from the shell as the root user, myself, and the apache user (www-data). Even more, I can run this same line of code successfully from a PHP file called from the command-line as php generate-pdf.php , and I'm able to run other shell commands such as touch test.txt just fine from an HTTP request.

Why am I unable to generate the PDF when called from an HTTP request?

The entire directory structure (including the phantomjs executable and generate-pdf.js) has been given 777 permissions, safe_mode has been disabled from both /etc/php5/apache2/php.ini and /etc/php5/cli/php.ini , and disable_functions does not include shell_exec .

Answer 1

If you made sure that shell_exec() itself is enabled, I guess it is a $PATH issue. You should execute it given the full path to the phantomjs binary:

shell_exec("cd $my_path && /path/to/phantomjs generate-pdf.js");