ChrisCree

<?php
// Do not copy opening php tag

// Force Stupid IE to NOT use compatibility mode
add_filter( 'wp_headers', 'wsm_keep_ie_modern' ); 
function wsm_keep_ie_modern( $headers ) {
        if ( isset( $_SERVER['HTTP_USER_AGENT'] ) && ( strpos( $_SERVER['HTTP_USER_AGENT'], 'MSIE' ) !== false ) ) {
                $headers['X-UA-Compatible'] = 'IE=edge,chrome=1';
        }
        return $headers;

robneu

<?php

/**
* Check the current post to see what type of post it is.
*
* This will return true whenever a post is equal to a specified post type.
* It can be useful when making global changes for a particular post type.
*
* @param   $post_types array or string the type of posts you're wanting to check.
* @return  bool true if the current post type matches any of the checked types.

calliaweb

<?php
// Do NOT include the opening php tag above

add_filter('tiny_mce_before_init', 'tiny_mce_remove_unused_formats' );
/*
 * Modify TinyMCE editor to remove H1.
 */
function tiny_mce_remove_unused_formats($init) {
	// Add block format elements you want to show in dropdown
	$init['block_formats'] = 'Paragraph=p;Heading 2=h2;Heading 3=h3;Heading 4=h4;Heading 5=h5;Heading 6=h6;Address=address;Pre=pre';

JiveDig

//* Put these in functions.php

/**
 * Description: This redirects the failed login to the custom login page instead of default login page with a modified url
 * @link ttp://wordpress.stackexchange.com/questions/110094/custom-login-redirects-to-wp-admin-on-wrong-password
**/
add_action( 'wp_login_failed', 'prefix_front_end_login_fail' );
function prefix_front_end_login_fail( $username ) {

	// Getting URL of the login page

GaryJones

<?php

/**
 * Get post image.
 */
function wds_get_post_image( $size = 'thumbnail' ) {

	// If featured image is present, use that
	if ( has_post_thumbnail() ) {
		return get_the_post_thumbnail( $size );

gregrickaby

<?php

/**
 * Set Yoast SEO metabox priority to low.
 */
function wds_client_move_yoastseo_metabox() {
	return 'low';
}
add_filter( 'wpseo_metabox_prio', 'wds_client_move_yoastseo_metabox' );

nickcernis

// Add genesis layout classes to the Block Editor.
// File lives in the theme's /js/ folder.
wp.domReady(function () {
    yourTheme.updateLayoutClass();

    var layouts = document.querySelector(".genesis-layout-selector");
    
    if( layouts ) {
        layouts.addEventListener("input", function (e) {
            yourTheme.updateLayoutClass();