<?php
echo '<meta property="og:url" content="http://'.$PowerBB->_SERVER['HTTP_HOST'].$PowerBB->_SERVER['REQUEST_URI'].'">
';
$Default_image = "styles/main/images/logo.png"; // Default image
$images = array();
$PowerBB->_CONF['template']['Subject_Info_Row']['text'] = stripslashes($PowerBB->_CONF['template']['Subject_Info_Row']['text']);
preg_match_all('/src=([\'"])?((?(1).*?|\S+))(?(1)\1)/', $PowerBB->_CONF['template']['Subject_Info_Row']['text'], $images);
foreach ($images[2] as $src)
{
if ($src)
{
$size = @getimagesize($src);
if (!@strstr(strtolower($src), ".gif")
and @strstr(strtolower($src),$PowerBB->_SERVER['HTTP_HOST'])
and $size[0]> 200)
{ 
$og_image = $src;     
break;
}               
}
}
if($og_image == false)
{
echo '<meta property="og:image" content="'.$Default_image.'">
';
}
else
{
echo '<meta property="og:image" content="'.$og_image.'">
';
}
?>