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WkHTMLtoPDF 0.12.2.1 PHP exec xvfb-run: Error: xauth command not found

I want to generate a PDF from a URL, so I execute the command by WkHTMLtoPDF as below:

/usr/bin/xvfb-run --server-args="-screen 0, 1920x1080x24" /usr/local/bin/wkhtmltopdf http://www.google.com /tmp/google.pdf  2>&1

The above command works fine on Terminal, But when I invoke the command inside PHP failed! And show me an error message as below:

array(2) { 
    [0]=> string(27) "which: no xauth in ((null))"
    [1]=> string(40) "xvfb-run: error: xauth command not found"
}

I don't know how to resolve this issue! Anyone can help me on this, my OS environment as below:

  • OS: CentOS release 6.6
  • wkhtmltopdf version: 0.12.2.1
  • nginx version: nginx/1.6.3

My PHP code as below:

<php
    $var = array();
    $res = 0;

    $cmd = '/usr/bin/xvfb-run --server-args="-screen 0, 1920x1080x24" /usr/local/bin/wkhtmltopdf http://www.google.com /tmp/google.pdf  2>&1';

    exec($cmd, $var, $res);

    echo $cmd.'&lt;br /&gt;';
    var_dump ($var);
?>
like image 369
Chunhui Zhang Avatar asked May 30 '15 05:05

Chunhui Zhang


2 Answers

For CentOS PHP environment the WkHTMLtoPDF tool not need xvfb-run to exec the command, But for Ubuntu PHP environment need xvfb-run to exec the command! I had revised my code as below and the issues was resolved:

$osName = 'lsb_release -d 2>&1';
exec('lsb_release -d', $osName);
$isCentOS   = strrpos(strtolower($osName[0]), 'centos'); 

$cmd = '/usr/local/bin/wkhtmltopdf http://www.google.com /tmp/google.pdf  2>&1';
if ($isCentOS === false) {
     $cmd = '/usr/bin/xvfb-run --server-args="-screen 0, 1920x1080x24" /usr/local/bin/wkhtmltopdf http://www.google.com /tmp/google.pdf  2>&1';
} 

The issues is currently resolved and Thanks @joaoBeno saved me for fixed this issue~~

like image 123
Chunhui Zhang Avatar answered Sep 21 '22 08:09

Chunhui Zhang


If you are using PHP-FPM, by default environmental variables are not inherited into a worker process. That's why xauth cannot be found in environment variable PATH. To fix this, you may set php-fpm's config file e.g. /etc/php-fpm.d/www.conf, usually in section [www]:

  1. either uncomment the line:

    ;clear_env = no

  2. or add new line:

    env[PATH] = '/usr/local/bin:/usr/bin:/bin'

like image 44
lubosdz Avatar answered Sep 19 '22 08:09

lubosdz