PHP Poppler implementation failure - php

Question

I am currently using this library https://github.com/php-poppler/php-poppler in addition to Poppler in order to convert PDF files to HTML. I installed the library via composer and unfortunately there is no documentation available except some guides about installation but still incomplete.
Given that this Main API usage:
$file = new Poppler\Process\PdfFile(...);
// Get pdf info
print_r($file->getInfo('test.pdf'));
// Get text content of pdf
echo $file->toText('test.pdf');
// Transform to html
$file->toHtml('test.pdf', '/path/for/html');
I can not even define what parameters should be given in $file = new Poppler\Process\PdfFile(...);
What I have tried:
<?php
include 'vendor/autoload.php';
use Poppler\Processor\PdfFile;
use Poppler\Driver\Pdfinfo;
use Poppler\Driver\Pdftohtml;
use Poppler\Driver\Pdftotext;
$a = new Pdfinfo;
$b = new Pdftohtml;
$c = new Pdftotext;
$file = new PdfFile($a,$b,$c);
print_r($file->getInfo('test.pdf'));
echo $file->toText('test.pdf');
$file->toHtml('test.pdf', 'Results');
?>
This gives an error:
Catchable fatal error: Argument 1 passed to Alchemy\BinaryDriver\AbstractBinary::__construct() must be an instance of Alchemy\BinaryDriver\ProcessBuilderFactoryInterface, none given
Here's PdfFile.php:
<?php
namespace Poppler\Processor;
use Poppler\Driver\Pdfinfo;
use Poppler\Driver\Pdftohtml;
use Poppler\Driver\Pdftotext;
use Poppler\Exception\FileNotFoundException;
class PdfFile
{
private $pdfinfo;
private $pdftotext;
private $pdftohtml;
public function __construct(Pdfinfo $pdfinfo, Pdftotext $pdftotext, Pdftohtml $pdftohtml)
{
$this->pdfinfo = $pdfinfo;
$this->pdftotext = $pdftotext;
$this->pdftohtml = $pdftohtml;
}
public function toText($inputfile, $toEncoding = 'UTF-8')
{
if (!file_exists($inputfile)) {
throw new FileNotFoundException("File $inputfile not found.");
}
$output = $this->pdftotext->command(array('-nopgbrk', $inputfile, '-'));
$fromEncoding = mb_detect_encoding($output);
if ($fromEncoding) {
return mb_convert_encoding($output, $toEncoding, $fromEncoding);
}
return mb_convert_encoding($output, $toEncoding);
}
public function toHtml($inputfile, $outputfile)
{
if (!file_exists($inputfile)) {
throw new FileNotFoundException("File $inputfile not found.");
}
$output = $this->pdftohtml->command(array($inputfile, $outputfile));
return $output;
}
public function getInfo($inputfile)
{
if (!file_exists($inputfile)) {
throw new FileNotFoundException("File $inputfile not found.");
}
$args = array($inputfile);
$output = $this->pdfinfo->command($args);
$info = array();
foreach (explode(PHP_EOL, $output) as $line) {
if (strpos($line, ': ') === false) {
continue;
}
$parts = explode(': ', $line);
$key = trim($parts[0]);
$value = trim($parts[1]);
$info[$key] = $value;
}
return $info;
}
}