介绍50个 WordPress 动作挂钩（11-20）

<?php

add_action( 'wp_default_styles', 'wp_default_styles_example' );

function wp_default_styles_example( $wp_styles ) {
    $wp_styles->remove( 'ie' );
}

?>

<?php

add_action( 'get_footer', 'get_footer_example' );

function get_footer_example( $name ) {
    if ( 'new' == $name ) { ?>
        <script>
            (function( $ ) {
                //put all your jQuery goodness in here.
            })( jQuery );
        </script>
    <?php
    }
}

// Example Source: http://codex.wordpress.org/Plugin_API/Action_Reference/get_footer

?>

<?php

add_action( 'admin_init', 'admin_init_example', 1 );

function admin_init_example() {
    if ( ! current_user_can( 'manage_options' ) && ( ! defined( 'DOING_AJAX' ) || ! DOING_AJAX ) ) {
        wp_redirect( site_url() ); 
        exit;
    }
}

// Example Source: http://codex.wordpress.org/Plugin_API/Action_Reference/admin_init

?>

<?php

add_action( 'wp_authenticate', 'wp_authenticate_example' );

function wp_authenticate_example( $username ) {
    $user = get_user_by( 'email', $username );
    if ( ! empty( $user->user_login ) ) {
        $username = $user->user_login;
    }
    return $username;
}

// Example Source: http://bavotasan.com/2011/log-in-to-wordpress-using-an-email-address/

?>

<?php

add_action( 'login_form', 'login_form_example' );

function login_form_example() {
    echo '<p><strong>Remember:</strong> You must enter your username, not your email address!</p>';
}

?>

<?php

if ( ! current_user_can( 'manage_options' ) ) {
    add_action( 'admin_menu', 'admin_menu_example' );
}

function admin_menu_example() {
  remove_menu_page( 'index.php' );                  //Dashboard
  remove_menu_page( 'edit.php' );                   //Posts
  remove_menu_page( 'upload.php' );                 //Media
  remove_menu_page( 'edit.php?post_type=page' );    //Pages
  remove_menu_page( 'edit-comments.php' );          //Comments
  remove_menu_page( 'themes.php' );                 //Appearance
  remove_menu_page( 'plugins.php' );                //Plugins
  remove_menu_page( 'users.php' );                  //Users
  remove_menu_page( 'tools.php' );                  //Tools
  remove_menu_page( 'options-general.php' );        //Settings

}

// Example Source: http://wpsnippy.com/remove-top-level-wordpress-dashboard-menu/

?>

<?php

add_action( 'wp', 'prefix_setup_schedule' );

/**
 * On an early action hook, check if the hook is scheduled - if not, schedule it.
 */
function prefix_setup_schedule() {
    if ( ! wp_next_scheduled( 'prefix_hourly_event' ) ) {
        wp_schedule_event( time(), 'hourly', 'prefix_hourly_event');
    }
}

add_action( 'prefix_hourly_event', 'prefix_do_this_hourly' );

/**
 * On the scheduled action hook, run a function.
 */
function prefix_do_this_hourly() {
    // do something every hour
}

// Example Source: http://codex.wordpress.org/Function_Reference/wp_schedule_event

?>

<?php

add_action( 'admin_head-index.php', 'admin_head_index_php_example' );

function admin_head_index_php_example() {
    add_screen_option(
        'layout_columns',
        array(
            'max'     => 3,
            'default' => 3
        )
    );
}

// Example Source: http://wpsnippy.com/bring-back-dashboard-screen-layout-options-wordpress-3-8/

?>

<?php

add_action( 'wp_before_admin_bar_render', 'wp_before_admin_bar_render_example' ); 

function wp_before_admin_bar_render_example() {
    global $wp_admin_bar;
    $wp_admin_bar->add_node( array(
        'id'    => 'contact-designer',
        'title' => 'Contact Designer',
        'href'  => 'http://barisunver.com.tr/contact/',
        'meta'  => array( 'target' => '_blank' )
    ) );
}

?>

<?php

add_action( 'profile_update', 'profile_update_example' );

function profile_update_example( $user_id ) {
    $site_url = get_bloginfo( 'name' );
    $user_info = get_userdata( $user_id );
    $user_name = $user_info->display_name;
    $user_email = $user_info->user_email;
    $subject = "Profile updated";
    $message = "Hello $user_name,\n\nYour profile has been updated! Please contact us if you're not the one who changed your profile.\n\nThank you for visiting $site_name.";
    wp_mail( $user_email, $subject, $message );
}

// Example Source: http://wpsnipp.com/index.php/functions-php/send-email-notification-when-profile-updates/

?>