WP Expertos/60/add_action

add_action.php

<?php add_action( 'hook', 'funcion', $prioridad, $argumentos ); ?>

add_filter.php

<?php add_filter( 'hook', 'funcion', $prioridad, $argumentos ); ?>

filter_order.php

<?php
add_action( 'the_title', 'print_c', 30, 2 );
add_action( 'the_title', 'print_b', 20, 2 );
add_action( 'the_title', 'print_a', 10, 2 );

function print_c($title, $post_id) {
  $title .= 'Press';
  return $title;
}
function print_b($title, $post_id) {
  $title .= 'Word';
  return $title;
}
function print_a($title, $post_id) {
  $title = '';
  return $title;  
}
?>

hack_wp_title.php

<?php
add_filter( 'wp_title', 'hack_wp_title' );

function hack_wp_title( $title )
{
    if ( empty( $title ) && ( is_home() || is_front_page() ) ) {
        $title = get_bloginfo('name') . ' | ' . get_bloginfo('description');
    } elseif ( is_archive() ) {
        $title = get_bloginfo( 'name' ) . ' | Archivo:'  . get_the_archive_title() );
    } else {
        $title = get_bloginfo( 'name' ) . ' | ' . get_the_title( get_the_ID() );
    }

    return $title;
} ?>

login_logo.php

<?php
add_action( 'login_enqueue_scripts', 'login_logo' );

function login_logo() { ?>
	<style type="text/css">
    body.login div#login h1 a {
        background-image: url(<?php echo get_stylesheet_directory_uri(); ?>/assets/img/logo.png);
        background-size: 100%;
        width: 155px;
        height: 55px;
		padding-bottom: 0px;
	}
	</style> <?php
} ?>