[WP] Get an image for Open Graph

wp_get_og_img.php

<?php
// Get an image for Open Graph - Uses WP Imager https://github.com/Jany-M/WP-Imager
if(is_singular()) {
	global $post;
	if(function_exists('wp_imager')) {
		$img = wp_imager(1200, 630, 1, '', '', '', true );
	} elseif(has_post_thumbnail($post->ID)) {
		$img = get_the_post_thumbnail_url( $post->ID, array(1200,630));
	}
} else {
	$img = get_stylesheet_directory_uri().'/img/placeholder.jpg';
}
?>

<meta property="og:image" content="<?php echo $img; ?>" />