WP Helper Functions

helper_functions.php

<?php

/*
 * Remove Dashboard Items
 */
if (is_admin()) {
    if (!(function_exists('pl_remove_dash_items'))) {
        function pl_remove_dash_items()
        {
            // Check that the built-in WordPress function remove_menu_page() exists in the current installation
            if (function_exists('remove_menu_page')) {
                // remove comments
                remove_menu_page('edit-comments.php');
                // remove widgets
                remove_submenu_page('themes.php', 'widgets.php');
                // remove theme customizer, header, and background
                global $submenu;
                foreach($submenu['themes.php'] as $menu_index => $theme_menu){
                    if($theme_menu[0] == 'Header' || $theme_menu[0] == 'Background' || $theme_menu[0] == 'Customize')
                    unset($submenu['themes.php'][$menu_index]);
                }
            }
        }
    }

    add_action('admin_menu', 'pl_remove_dash_items');
}

/*
 * Get page ID by slug
 */
function get_post_id_by_name($post_name, $post_type = 'post'){
    $post_ids = get_posts(
		array(
	        'name'   => $post_name,
	        'post_type'   => $post_type,
	        'numberposts' => -1,
	        'fields' => 'ids'
	    )
	);

    return array_shift($post_ids);
}

/**
 * Force Yoast meta box to bottom of page.
 */
function yoasttobottom() {
    return 'low';
}
add_filter('wpseo_metabox_prio', 'yoasttobottom');

/*
 * Remove featured image meta box from pages
 */
function remove_featured_image() {
    remove_meta_box( 'postimagediv', 'page', 'side' );
}
add_action('do_meta_boxes', 'remove_featured_image');

/*
 * Rewrite search URLs
 */
function search_url_rewrite() {
    if ( is_search() && !empty($_GET['s']) ) {
        wp_redirect( home_url("/search/") .urlencode(get_query_var('s')) .'/' );
        exit();
    }
}
add_action('template_redirect', 'search_url_rewrite');

/*
 * Rewrite search URLs - retain post_type query var
 */
// function search_url_rewrite() {
//     if ( is_search() && array_key_exists('s', $_GET) ) {
//         if ( array_key_exists('post_type', $_GET) ) { // retain post_type query
//             wp_redirect( home_url("/search/") .urlencode(get_query_var('s')) .'/?post_type=' .urlencode(get_query_var('post_type')), 301 );
//         } else {
//             wp_redirect( home_url("/search/") .urlencode(get_query_var('s')) .'/', 301 );
//         }
//         exit();
//     }
// }
// add_action('template_redirect', 'search_url_rewrite');

/*
 * Prevent <p> from wrapping <img> in content
 */
function filter_ptags_on_images( $content ){
   return preg_replace('/<p>\s*(<a .*>)?\s*(<img .* \/>)\s*(<\/a>)?\s*<\/p>/iU', '\1\2\3', $content);
}
add_filter('the_content', 'filter_ptags_on_images');

// load GF scripts in the footer
// http://www.gravityhelp.com/documentation/gravity-forms/extending-gravity-forms/hooks/filters/gform_init_scripts_footer/
// https://bjornjohansen.no/load-gravity-forms-js-in-footer
add_filter( 'gform_init_scripts_footer', '__return_true' );
function wrap_gform_cdata_open( $content = '' ) {
    if ( ( defined('DOING_AJAX') && DOING_AJAX ) || isset( $_POST['gform_ajax'] ) ) {
        return $content;
    }
    $content = 'document.addEventListener( "DOMContentLoaded", function() { ';
    return $content;
}
add_filter( 'gform_cdata_open', 'wrap_gform_cdata_open', 1 );
function wrap_gform_cdata_close( $content = '' ) {
    if ( ( defined('DOING_AJAX') && DOING_AJAX ) || isset( $_POST['gform_ajax'] ) ) {
        return $content;
    }
    $content = ' }, false );';
    return $content;
}
add_filter( 'gform_cdata_close', 'wrap_gform_cdata_close', 99 );

/**
 * defer_parsing_of_js
 *
 * defers parsing of js files
 *
 * @param  string $url
 * @return string return .js URL w/ defer directive
 */
function defer_parsing_of_js ( $url ) {
    if ( FALSE === strpos( $url, '.js' ) ) return $url;
    if ( strpos( $url, 'jquery.js' ) ) return $url;
    return "$url' defer ";
}
add_filter( 'clean_url', 'defer_parsing_of_js', 11, 1 );