An Open Graph class for autocreation of meta and open graph tags in Processwire.
Tested on Processwire 3.0.165
upload it to your templates folder and use it like this:
<head>
<?php
include_once("./opengraphPW/opengraphPW.php");
$OG=new openGraph(
$page, // current PW page, required
$pages, // PW pages wire object, required
$config->urls->templates.'img/cover.jpg', // A general image (1200x628px recomended) for pages like a home page where there's no content image, optional
"Title of your website"); // A generic title if the home element is called something like "home", optional
?>
</head>The class will automatically print the tags