/vendor/dompdf/dompdf/dompdf.php

<?php
/**
 * Command line utility to use dompdf.
 * Can also be used with HTTP GET parameters
 *
 * @package dompdf
 * @link    http://dompdf.github.com/
 * @author  Benj Carson <benjcarson@digitaljunkies.ca>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */

/**
 * Display command line usage
 */
function dompdf_usage()
{
    $default_paper_size = DOMPDF_DEFAULT_PAPER_SIZE;

    echo <<<EOD
  
Usage: {$_SERVER["argv"][0]} [options] html_file

html_file can be a filename, a url if fopen_wrappers are enabled, or the '-' character to read from standard input.

Options:
 -h             Show this message
 -l             List available paper sizes
 -p size        Paper size; something like 'letter', 'A4', 'legal', etc.  
                  The default is '$default_paper_size'
 -o orientation Either 'portrait' or 'landscape'.  Default is 'portrait'
 -b path        Set the 'document root' of the html_file.  
                  Relative urls (for stylesheets) are resolved using this directory.  
                  Default is the directory of html_file.
 -f file        The output filename.  Default is the input [html_file].pdf
 -v             Verbose: display html parsing warnings and file not found errors.
 -d             Very verbose: display oodles of debugging output: every frame 
                  in the tree printed to stdout.
 -t             Comma separated list of debugging types (page-break,reflow,split)
 
EOD;
    exit;
}

/**
 * Parses command line options
 *
 * @return array The command line options
 */
function getoptions()
{

    $opts = array();

    if ($_SERVER["argc"] == 1)
        return $opts;

    $i = 1;
    while ($i < $_SERVER["argc"]) {

        switch ($_SERVER["argv"][$i]) {

            case "--help":
            case "-h":
                $opts["h"] = true;
                $i++;
                break;

            case "-l":
                $opts["l"] = true;
                $i++;
                break;

            case "-p":
                if (!isset($_SERVER["argv"][$i + 1]))
                    die("-p switch requires a size parameter\n");
                $opts["p"] = $_SERVER["argv"][$i + 1];
                $i += 2;
                break;

            case "-o":
                if (!isset($_SERVER["argv"][$i + 1]))
                    die("-o switch requires an orientation parameter\n");
                $opts["o"] = $_SERVER["argv"][$i + 1];
                $i += 2;
                break;

            case "-b":
                if (!isset($_SERVER["argv"][$i + 1]))
                    die("-b switch requires a path parameter\n");
                $opts["b"] = $_SERVER["argv"][$i + 1];
                $i += 2;
                break;

            case "-f":
                if (!isset($_SERVER["argv"][$i + 1]))
                    die("-f switch requires a filename parameter\n");
                $opts["f"] = $_SERVER["argv"][$i + 1];
                $i += 2;
                break;

            case "-v":
                $opts["v"] = true;
                $i++;
                break;

            case "-d":
                $opts["d"] = true;
                $i++;
                break;

            case "-t":
                if (!isset($_SERVER['argv'][$i + 1]))
                    die("-t switch requires a comma separated list of types\n");
                $opts["t"] = $_SERVER['argv'][$i + 1];
                $i += 2;
                break;

            default:
                $opts["filename"] = $_SERVER["argv"][$i];
                $i++;
                break;
        }

    }
    return $opts;
}

require_once("dompdf_config.inc.php");
global $_dompdf_show_warnings, $_dompdf_debug, $_DOMPDF_DEBUG_TYPES;

$sapi = php_sapi_name();
$options = array();

switch ($sapi) {

    case "cli":

        $opts = getoptions();

        if (isset($opts["h"]) || (!isset($opts["filename"]) && !isset($opts["l"]))) {
            dompdf_usage();
            exit;
        }

        if (isset($opts["l"])) {
            echo "\nUnderstood paper sizes:\n";

            foreach (array_keys(CPDF_Adapter::$PAPER_SIZES) as $size)
                echo "  " . mb_strtoupper($size) . "\n";
            exit;
        }
        $file = $opts["filename"];

        if (isset($opts["p"]))
            $paper = $opts["p"];
        else
            $paper = DOMPDF_DEFAULT_PAPER_SIZE;

        if (isset($opts["o"]))
            $orientation = $opts["o"];
        else
            $orientation = "portrait";

        if (isset($opts["b"]))
            $base_path = $opts["b"];

        if (isset($opts["f"]))
            $outfile = $opts["f"];
        else {
            if ($file === "-")
                $outfile = "dompdf_out.pdf";
            else
                $outfile = str_ireplace(array(".html", ".htm", ".php"), "", $file) . ".pdf";
        }

        if (isset($opts["v"]))
            $_dompdf_show_warnings = true;

        if (isset($opts["d"])) {
            $_dompdf_show_warnings = true;
            $_dompdf_debug = true;
        }

        if (isset($opts['t'])) {
            $arr = split(',', $opts['t']);
            $types = array();
            foreach ($arr as $type)
                $types[trim($type)] = 1;
            $_DOMPDF_DEBUG_TYPES = $types;
        }

        $save_file = true;

        break;

    default:

        if (isset($_GET["input_file"]))
            $file = rawurldecode($_GET["input_file"]);
        else
            throw new DOMPDF_Exception("An input file is required (i.e. input_file _GET variable).");

        if (isset($_GET["paper"]))
            $paper = rawurldecode($_GET["paper"]);
        else
            $paper = DOMPDF_DEFAULT_PAPER_SIZE;

        if (isset($_GET["orientation"]))
            $orientation = rawurldecode($_GET["orientation"]);
        else
            $orientation = "portrait";

        if (isset($_GET["base_path"])) {
            $base_path = rawurldecode($_GET["base_path"]);
            $file = $base_path . $file; # Set the input file
        }

        if (isset($_GET["options"])) {
            $options = $_GET["options"];
        }

        $file_parts = explode_url($file);

        /* Check to see if the input file is local and, if so, that the base path falls within that specified by DOMDPF_CHROOT */
        if (($file_parts['protocol'] == '' || $file_parts['protocol'] === 'file://')) {
            $file = realpath($file);
            if (strpos($file, DOMPDF_CHROOT) !== 0) {
                throw new DOMPDF_Exception("Permission denied on $file. The file could not be found under the directory specified by DOMPDF_CHROOT.");
            }
        }

        if ($file_parts['protocol'] === 'php://') {
            throw new DOMPDF_Exception("Permission denied on $file. This script does not allow PHP streams.");
        }

        $outfile = "dompdf_out.pdf"; # Don't allow them to set the output file
        $save_file = false; # Don't save the file

        break;
}

$dompdf = new DOMPDF();

if ($file === "-") {
    $str = "";
    while (!feof(STDIN))
        $str .= fread(STDIN, 4096);

    $dompdf->load_html($str);

} else
    $dompdf->load_html_file($file);

if (isset($base_path)) {
    $dompdf->set_base_path($base_path);
}

$dompdf->set_paper($paper, $orientation);

$dompdf->render();

if ($_dompdf_show_warnings) {
    global $_dompdf_warnings;
    foreach ($_dompdf_warnings as $msg)
        echo $msg . "\n";
    echo $dompdf->get_canvas()->get_cpdf()->messages;
    flush();
}

if ($save_file) {
//   if ( !is_writable($outfile) )
//     throw new DOMPDF_Exception("'$outfile' is not writable.");
    if (strtolower(DOMPDF_PDF_BACKEND) === "gd")
        $outfile = str_replace(".pdf", ".png", $outfile);

    list($proto, $host, $path, $file) = explode_url($outfile);
    if ($proto != "") // i.e. not file://
        $outfile = $file; // just save it locally, FIXME? could save it like wget: ./host/basepath/file

    $outfile = realpath(dirname($outfile)) . DIRECTORY_SEPARATOR . basename($outfile);

    if (strpos($outfile, DOMPDF_CHROOT) !== 0)
        throw new DOMPDF_Exception("Permission denied.");

    file_put_contents($outfile, $dompdf->output(array("compress" => 0)));
    exit(0);
}

if (!headers_sent()) {
    $dompdf->stream($outfile, $options);
}