Here is a collection of code snippets that I use and have found helpful.
- Add a pattern attribute to a Jetpack contact form field
- Add a max character limit to a Jetpack contact form field
- Custom Page Titles
- Custom Page Titles with Yoast
- Customising the Custom Post Type Query
- Enabling Shortcodes within the Custom HTML Widget
- Send Post Comments to Custom Email Addresses
Restricting what URLs site visitors can enter into a Jetpack form URL field - in this case only YouTube URLs.
add_filter( 'grunion_contact_form_field_html', function( $rendered_field, $field_label, $id ) {
if ( $field_label === 'Website' ) { // Update this value if your URL field has a different name.
$rendered_field = preg_replace(
'/pattern="([^"]*)"/',
'pattern="^https:\/\/(?:(?:www\.)?youtube\.com|youtu\.be)\/.*$"',
$rendered_field
);
// Update the custom validity message
$rendered_field = preg_replace(
'/setCustomValidity\\("[^&]*"\\)/',
'setCustomValidity("Please enter a valid YouTube URL")',
$rendered_field
);
}
return $rendered_field;
}, 10, 3 )Add a max character limit of 500 to the messages field, along with a span element explaining the limit.
add_filter( 'grunion_contact_form_field_html', function( $rendered_field, $field_label, $id ) {
if ( $field_label === 'Message' && strpos( $rendered_field, '<textarea' ) !== false ) {
$rendered_field = preg_replace(
'/<textarea/',
'<textarea maxlength="500"',
$rendered_field,
1
);
$limit_text = sprintf(
/* translators: %d: maximum number of characters allowed */
esc_html__( 'Maximum %d characters allowed', 'your-text-domain' ),
500
);
$rendered_field = str_replace(
'</div>',
'<span id="message-limit-' . esc_attr($id) . '" class="message-limit-text" style="display: block; margin-top: 4px; font-size: 0.8em; color: #666;">' . $limit_text . '</span></div>',
$rendered_field
);
}
return $rendered_field;
}, 10, 3 );Assuming you have added theme support for title-tag.
function custom_theme_titles( $titleparts ) {
if ( is_front_page() ) {
$pagetitle = $titleparts['title'];
$titleparts['title'] = $pagetitle;
unset( $titleparts['site'] );
}
elseif ( is_404() ) {
$pagetitle = "404";
$sep = " | ";
$name = get_bloginfo( 'name', 'display' );
$sep2 = " - ";
$desc = get_bloginfo( 'description', 'display' );
$titleparts['title'] = $pagetitle.$sep.$name.$sep2.$desc;
unset( $titleparts['site'] );
}
elseif (is_category() ) {
$category = get_the_category();
$catName = $category[0]->cat_name;
$pagetitle = "Blog - ".$catName." archives";
$sep = " | ";
$name = get_bloginfo( 'name', 'display' );
$sep2 = " - ";
$desc = get_bloginfo( 'description', 'display' );
$titleparts['title'] = $pagetitle.$sep.$name.$sep2.$desc;
unset( $titleparts['site'] );
}
else {
$pagetitle = $titleparts['title'];
$sep = " | ";
$name = get_bloginfo( 'name', 'display' );
$sep2 = " - ";
$desc = get_bloginfo( 'description', 'display' );
$titleparts['title'] = $pagetitle.$sep.$name.$sep2.$desc;
unset( $titleparts['site'] );
}
return $titleparts;
}
add_filter( 'document_title_parts', 'custom_theme_titles', PHP_INT_MAX );For creating custom page titles if you have Yoast SEO installed and activated.
function custom_theme_titles_yoast( $title ) {
$sep = '|';
$name = get_bloginfo( 'name' );
$desc = get_bloginfo( 'description', 'display' );
if( is_front_page() ) {
$pagetitle = $title;
return "{$pagetitle}";
}
elseif( is_404() ) {
$pagetitle = "404";
return "{$pagetitle} {$sep} {$name} - {$desc}";
}
else {
$pagetitle = $title;
return "{$pagetitle} {$sep} {$name} - {$desc}";
}
}
add_filter( 'wpseo_title', 'custom_theme_titles_yoast', PHP_INT_MAX );Working with pre_get_posts to modify custom post type (events) output on a page (only displaying posts that have a checkbox checked (using the advanced custom fields plugin) and only showing a maximum of 3 posts per page).
function ka_event_query( $query ) {
if( $query->is_main_query() && !$query->is_feed() && !is_admin() && $query->is_post_type_archive( 'events' ) ) {
//Filtering out posts that have checkbox checked (therefore marked as true)
$meta_query = array(
array(
'key' => 'event_current', //key as created in advanced custom field
'value' => true,
'compare' => 'BOOLEAN'
)
);
$query->set( 'meta_query', $meta_query );
//Display only 3 posts
$query->set( 'posts_per_page', '3' );
}
}
add_action( 'pre_get_posts', 'ka_event_query' );Enabling shortcodes within the Text Widget does not transfer over to the newer Custom HTML Widget. This allows shortcodes in the Custom HTML Widget.
add_filter('widget_custom_html_content','do_shortcode');Here is a solution to make sure all post comments go to the post author (allowing for custom post-types as well) and a second specified email address. Alternatively just leave the specified email address as the only option.
function ka_comment_moderation_recipients( $emails, $comment_id ) {
$comment = get_comment( $comment_id );
if(empty($comment)) {
return $emails;
}
$post = get_post( $comment->comment_post_ID );
// Refine if you only want comments from a custom post type (or remove this section)
if($post->post_type != "custom_post_type") {
return $emails;
}
$user = get_user_by( 'id', $post->post_author );
// Return the post author email if the author can modify, as well as a custom email
if ( user_can( $user->ID, 'edit_published_posts' ) && ! empty( $user->user_email ) ) {
$emails = array( $user->user_email, '[email protected]');
}
//Else return just the custom email
else {
$emails = array('[email protected]');
}
return $emails;
}
add_filter( 'comment_moderation_recipients', 'ka_comment_moderation_recipients', 11, 2 );
add_filter( 'comment_notification_recipients', 'ka_comment_moderation_recipients', 11, 2 );