Minimal PHP example of printing HTML to PDF using Headless Chrome

PrintToPDF.php

<?php

$chromeExec = 'google-chrome';

$inputFile = __DIR__.'/input.html';
$outputFile = __DIR__.'/output.pdf';

$version = shell_exec($chromeExec . ' --version 2>&1');
if(!strpos($version, 'Google Chrome') === 0) {
    throw new Exception('Google Chrome not found at: '.$chromeExec);
}

$html = file_get_contents($inputFile);
$url = 'data:text/html,' . rawurlencode($html);

$command = sprintf(
    '%s --headless --disable-gpu --print-to-pdf=%s %s 2>&1', $chromeExec, escapeshellarg($outputFile), escapeshellarg($url)
);
exec($command);

Install Chrome on CentOS:

wget https://dl.google.com/linux/direct/google-chrome-stable_current_x86_64.rpm
sudo yum install -y ./google-chrome-stable_current_x86_64.rpm 
sudo yum install -y liberation-fonts