因为@toscho已经回答了here, 是的，这是可能的。

您只需将此代码复制到functions.php 这就是你的主题。

// get all posts
$posts = get_posts( array (  \'numberposts\' => -1 ) );

foreach ( $posts as $post )
{
    // check the slug and run an update if necessary 
    $new_slug = sanitize_title( $post->post_title );

    // use this line if you have multiple posts with the same title
    $new_slug = wp_unique_post_slug( $new_slug, $post->ID, $post->post_status, $post->post_type, $post->post_parent );

    if ( $post->post_name != $new_slug )
    {
        wp_update_post(
            array (
                \'ID\'        => $post->ID,
                \'post_name\' => $new_slug
            )
        );
    }
}

如果创建yourplugin.php 插件文件夹中的文件，带有有效的插件头和以上代码：

<?php
    /*
    Plugin Name: Your Plugin
    Plugin URI: http://www.example.com
    Description: description
    Version: 0.1
    Author: thatsyou
    Author URI: http://www.yourdomain.com
    License: MIT
    */

    //yourcode
?>  

请注意，如果您将此代码复制到functions.php 或者激活插件，它会一直执行。在这里，您可以了解如何只执行一次代码：Best Practices