介绍50个 WordPress 动作挂钩（41-50）

<?php

add_action( 'admin_head-tools_page_myplugin/myplugin', 'admin_head_plugin_page_example' );

function admin_head_plugin_page_example() {
    echo '<style type="text/css">'
       . '/* your style here */'
       . '</style>';
}

// Example Source: http://codex.wordpress.org/Plugin_API/Action_Reference/admin_head-(plugin_page)

?>

<?php

add_action( 'pre_ping', 'pre_ping_example' );
function pre_ping_example( &$links ) {

    foreach ( $links as $l => $link ) {

        if ( 0 === strpos( $link, get_home_url() ) ) {
            unset( $links[ $l ] );
        }

    }

}

// Example Source: http://wpdevsnippets.com/remove-slef-pings/

?>

<?php

add_action( 'get_header', 'get_header_example' );

function get_header_example() {

    if ( ! current_user_can( 'activate_plugins' ) ) {
        wp_die( 'The website will be back soon.' );
    }

}

// Example Source: http://wp-snippets.com/articles/7-code-snippets-you-should-use-on-every-site/

?>

<?php

add_action( 'login_head', 'login_head_example' );
function login_head_example() {
    remove_action( 'login_head', 'wp_shake_js', 12 );
}

// Example Source: http://wordpress.org/support/topic/plugin-simplemodal-login-remove-shake-effect

?>

<?php

add_action( 'admin_footer', 'admin_footer_example' );
function admin_footer_example() {

    echo '<style type="text/css">
    .status-draft   { background-color: #FCE3F2; }
    .status-pending { background-color: #87C5D6; }
    .status-future  { background-color: #C6EBF5; }
    .status-private { background-color: #F2D46F; }
    </style>';

}

// Example Source: http://wpsnipp.com/index.php/functions-php/change-admin-postpage-color-by-status-draft-pending-published-future-private/

?>

<?php

add_action( 'login_enqueue_scripts', 'login_enqueue_scripts_example' );
function login_enqueue_scripts_example() {

    echo '<style type="text/css">'
            . '#login h1 a {'
                . 'background-image: url(' . get_bloginfo( 'template_directory' ) . 'https://static.wpdaxue.com/images/login-logo.png);'
                . 'padding-bottom: 30px;'
            . '}'
        . '</style>';

}

// Example Source: http://wpsnippy.com/add-custom-login-logo-in-your-wordpress-blog/

?>

<?php

add_action( 'manage_users_custom_column', 'manage_users_custom_column_example', 10, 3 );
add_filter( 'manage_users_columns', 'manage_users_columns_example' );

// create a new column named "Zip Code"
function manage_users_columns_example( $columns ) {

    $columns['user_registered'] = __( 'Registration Date', 'theme-name' );
    return $columns;

}

// fill the column cells with the registration dates
function manage_users_custom_column_example( $value, $column_name, $user_id ) {

    if ( 'user_registered' == $column_name ) {

        $userdata = get_userdata( $user_id );
        return $userdata->user_registered;

    }

}

// Example Source (Idea): http://tommcfarlin.com/add-custom-user-meta-during-registration/

?>

<?php

add_action( 'activated_plugin', 'activated_plugin_example', 10, 2);
function activated_plugin_example( $plugin, $network_activation ) {

    $to         = get_option( 'admin_email' );
    $subject    = 'A plugin has been activated';
    $body       = "Hey,\n\nThe following plugin has just been activated:\n\n$plugin\n\nCheers!";

    wp_mail( $to, $subject, $body );
}

?>

<?php

if( is_admin() ) {
    remove_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );
}

// Example Source: http://wpsnipp.com/index.php/functions-php/remove-admin-color-scheme-picker-from-profile/

?>

<?php

add_action( 'wp_logout', 'wp_logout_example' );

function wp_logout_example() {
    wp_redirect( home_url() );
    exit();
}

// Example Source: http://wpsnippy.com/auto-redirect-users-after-logout/

?>