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understrap/inc/extras.php

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<?php
/**
* Custom functions that act independently of the theme templates.
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*
* Eventually, some of the functionality here could be replaced by core features.
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*
* @package understrap
*/
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// Exit if accessed directly.
defined( 'ABSPATH' ) || exit;
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add_filter( 'body_class', 'understrap_body_classes' );
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if ( ! function_exists( 'understrap_body_classes' ) ) {
/**
* Adds custom classes to the array of body classes.
*
* @param array $classes Classes for the body element.
*
* @return array
*/
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function understrap_body_classes( $classes ) {
// Adds a class of group-blog to blogs with more than 1 published author.
if ( is_multi_author() ) {
$classes[] = 'group-blog';
}
// Adds a class of hfeed to non-singular pages.
if ( ! is_singular() ) {
$classes[] = 'hfeed';
}
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return $classes;
}
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}
// Removes tag class from the body_class array to avoid Bootstrap markup styling issues.
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add_filter( 'body_class', 'understrap_adjust_body_class' );
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if ( ! function_exists( 'understrap_adjust_body_class' ) ) {
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/**
* Setup body classes.
*
* @param string $classes CSS classes.
*
* @return mixed
*/
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function understrap_adjust_body_class( $classes ) {
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foreach ( $classes as $key => $value ) {
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if ( 'tag' == $value ) {
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unset( $classes[ $key ] );
}
}
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return $classes;
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}
}
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// Filter custom logo with correct classes.
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add_filter( 'get_custom_logo', 'understrap_change_logo_class' );
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if ( ! function_exists( 'understrap_change_logo_class' ) ) {
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/**
* Replaces logo CSS class.
*
* @param string $html Markup.
*
* @return mixed
*/
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function understrap_change_logo_class( $html ) {
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$html = str_replace( 'class="custom-logo"', 'class="img-fluid"', $html );
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$html = str_replace( 'class="custom-logo-link"', 'class="navbar-brand custom-logo-link"', $html );
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$html = str_replace( 'alt=""', 'title="Home" alt="logo"', $html );
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return $html;
}
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}
/**
* Display navigation to next/previous post when applicable.
*/
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if ( ! function_exists( 'understrap_post_nav' ) ) {
function understrap_post_nav() {
// Don't print empty markup if there's nowhere to navigate.
$previous = ( is_attachment() ) ? get_post( get_post()->post_parent ) : get_adjacent_post( false, '', true );
$next = get_adjacent_post( false, '', false );
if ( ! $next && ! $previous ) {
return;
}
?>
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<nav class="container navigation post-navigation">
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<h2 class="sr-only"><?php esc_html_e( 'Post navigation', 'understrap' ); ?></h2>
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<div class="row nav-links justify-content-between">
<?php
if ( get_previous_post_link() ) {
previous_post_link( '<span class="nav-previous">%link</span>', _x( '<i class="fa fa-angle-left"></i>&nbsp;%title', 'Previous post link', 'understrap' ) );
}
if ( get_next_post_link() ) {
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next_post_link( '<span class="nav-next">%link</span>', _x( '%title&nbsp;<i class="fa fa-angle-right"></i>', 'Next post link', 'understrap' ) );
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}
?>
</div><!-- .nav-links -->
</nav><!-- .navigation -->
<?php
}
}
if ( ! function_exists( 'understrap_pingback' ) ) {
/**
* Add a pingback url auto-discovery header for single posts of any post type.
*/
function understrap_pingback() {
if ( is_singular() && pings_open() ) {
echo '<link rel="pingback" href="' . esc_url( get_bloginfo( 'pingback_url' ) ) . '">' . "\n";
}
}
}
add_action( 'wp_head', 'understrap_pingback' );
if ( ! function_exists( 'understrap_mobile_web_app_meta' ) ) {
/**
* Add mobile-web-app meta.
*/
function understrap_mobile_web_app_meta() {
echo '<meta name="mobile-web-app-capable" content="yes">' . "\n";
echo '<meta name="apple-mobile-web-app-capable" content="yes">' . "\n";
echo '<meta name="apple-mobile-web-app-title" content="' . esc_attr( get_bloginfo( 'name' ) ) . ' - ' . esc_attr( get_bloginfo( 'description' ) ) . '">' . "\n";
}
}
add_action( 'wp_head', 'understrap_mobile_web_app_meta' );
if ( ! function_exists( 'understrap_default_body_attributes' ) ) {
/**
* Adds schema markup to the body element.
*
* @param array $atts An associative array of attributes.
* @return array
*/
function understrap_default_body_attributes( $atts ) {
$atts['itemscope'] = '';
$atts['itemtype'] = 'http://schema.org/WebSite';
return $atts;
}
}
add_filter( 'understrap_body_attributes', 'understrap_default_body_attributes' );