I have found it incredibly useful to hook into the_content when prepending or appending things to the main content area of a WordPress website!
add_filter( 'the_content', function( $content ) {
$ACF = get_field('acf_field');
$a_shortcode = do_shortcode( '[contact-form-7 id="1" title="CF7 Form!"]' );
$post_meta = get_post_meta( get_the_ID(), 'key', true )
if( ! is_front_page() && $acf == 1 ) {
return $content.$a_shortcode.$post_meta;
} else {
return $content;
}
}, 0);
This is just for example… I can output Advanced Custom Fields, Shortcodes (like Contact Form 7 forms) or regular old custom fields / post meta and use conditions like if ACF exists on any page except the front page etc. Very useful!
