我提供了一个小插件来实现这一点。该插件基于WordPress Hello插件，其工作原理与WordPress Hello插件类似。只需将下面的脚本保存到一个文件（例如mynotes.php）中，并放在插件文件夹中即可。您还可以编辑插件名称和函数以满足您的需要。要更改注释，只需替换函数my\\u notes（）中的内容$notes即可。

<?php
/**
 * @file
 * My Note WordPress plugin.
 * Plugin name: My Note
 * Author: Your Name
 * Description: My custom plugin to create notes for admin
 * Version: 1.0
 */
if (!defined(\'ABSPATH\')) die(\'Direct access is not allowed.\');
// 
function my_notes() {
    /** Put our notes here one per line */
    $notes = "Hello, Admin, welcome to my notes. Notes will always show here.";

    //split the notes into lines
    $notes = explode( "\\n", $notes );

    //return the lines randonmly
    return wptexturize( $notes[ mt_rand( 0, count( $notes ) - 1 ) ] );

}

// This just echoes the chosen line
function show_notes() {
    $note = my_notes();
    echo "<div id=\'notes\'>
            <h4>My Note</h4>
            <em>$note</em>
         </div>";
}

// Set the function up to execute when the admin_notices action is called
add_action( \'admin_notices\', \'show_notes\' );

// Create CSS to stylize and position the output
function notes_css() {

    echo "
    <style type=\'text/css\'>
    #notes {position:fixed; right:calc(40% - 110px); top:0; line-height: 19px; padding: 12.5px; font-size: 12px; text-align: left; margin: 25px 20px 0 2px; background-color: #fff;
        width:220px; height:auto; box-shadow: 0 1px 1px 0 rgba(0,0,0,.1);}
    #notes h4{display:block; margin:0 0 13px; font-size:14px; font-weight:600; color:#162E43; text-align:center;}
    </style>
    ";
}

add_action( \'admin_head\', \'notes_css\' );

?>