Prepend content on WordPress sites
With the advent of block and patterns in themes, the ability for plugins to prepend some content on posts and pages has got a little more complicated.
The old method of filtering the content, doesn’t look good as a quirk is that filter hook is fired at the top of the page or post. Ouch.
add_filter( ‘the_content’, ‘my_prepend_to_content’ );
So now you will need to detect whether it is a block theme or not and act accordingly…
function my_prepend_setup() {
if ( wp_is_block_theme() ) {
// For block themes: hook into Post Content block rendering
add_filter( 'render_block', 'my_prepend_inside_post_content', 10, 2 );
} else {
// For classic themes: hook into the_content
add_filter( 'the_content', 'my_prepend_to_content' );
}
}
add_action( 'after_setup_theme', 'my_prepend_setup' );
function my_prepend_inside_post_content($block_content, $block){
// the is_singular('post'), renders the prepend only on a single post.
if ( $block['blockName'] === 'core/post-content' && is_singular('post') ) {
$prepend = '<div class="custom-prepend">Hello from inside Post Content</div>';
return $prepend . $block_content;
}
return $block_content;
}
function my_prepend_to_content($content){
//for non block themes
$prepend = '<div class="custom-prepend">Hello from inside Post Content</div>';
return $prepend.$content
}But even then some older themes don’t play nicely, so the function becomes…
function church_admin_premium_prayer_request_form_prepend_setup() {
if ( wp_is_block_theme() ) {
// For block themes: hook into Post Content block rendering
add_filter( 'render_block', 'my_prepend_inside_post_content', 10, 2 );
} else {
// For classic themes: hook into the_content
$theme = wp_get_theme(); // gets the current theme
if ( 'Avada' == $theme->name || 'Avada' == $theme->parent_theme )
{ add_action('avada_before_main_container', 'my_prepend_to_content');
} elseif ( 'The7' == $theme->name || 'The7' == $theme->parent_theme ) {
add_action('presscore_before_loop', 'my_prepend_to_content');
} elseif( 'Omega' == $theme->name || 'Omega' == $theme->parent_theme ) {
add_action('omega_before_content', 'my_prepend_to_content');
}elseif(has_action('fusion_blog_shortcode_before_loop') ) {
add_action('fusion_blog_shortcode_before_loop', 'my_prepend_to_content');
}
else{
add_action('loop_start', 'my_prepend_to_content');
}
}
}Let me know of any other themes that have strange content action/filter behaviour.
Hope the code helps
