您要将数据提交到admin_post_(action) 然后处理请求。您可能需要jQuery 拦截单击并提供所有必需的数据，但这将显示主要部分。

HTML

<form action="http://www.example.com/wp-admin/admin-post.php" method="post">
  <input type="hidden" name="action" value="add_foobar">
  <input type="hidden" name="data" value="foobarid"> 
  <input type="submit" value="Submit">
</form>

add_action( \'admin_post_foobar\', \'prefix_admin_foobar\' );
add_action( \'admin_post_nopriv_foobar\', \'prefix_admin_foobar\' );

function prefix_admin_foobar() {

    status_header( 200 );

    $my_post = array (
            \'ID\'           => (int) $_REQUEST[ \'data\' ],
            \'post_title\'   => \'This is the post title.\',
            \'post_content\' => \'This is the updated content.\',
    );

    // Update the post into the database
    wp_update_post( $my_post );

    die( "Server updated \'{$_REQUEST[\'data\']}\' from your browser." );
}

// Test with [front-end-editor] in your post content

add_shortcode( \'front-end-editor\', \'front_end_editor_shortcode\' );

function front_end_editor_shortcode() {

    if ( ! is_admin() ) {
        require_once( ABSPATH . \'wp-admin/includes/template.php\' );
    }

    // current post id
    $post_id = get_the_ID();
    $post    = get_post( $post_id, OBJECT, \'edit\' );
    $content = $post->post_content; // current content

    // editor settings
    $editor_id = \'mycustomeditor\';
    $settings  = array (
            \'wpautop\'          => true,   // Whether to use wpautop for adding in paragraphs. Note that the paragraphs are added automatically when wpautop is false.
            \'media_buttons\'    => true,   // Whether to display media insert/upload buttons
            \'textarea_name\'    => $editor_id,   // The name assigned to the generated textarea and passed parameter when the form is submitted.
            \'textarea_rows\'    => get_option( \'default_post_edit_rows\', 10 ),  // The number of rows to display for the textarea
            \'tabindex\'         => \'\',     // The tabindex value used for the form field
            \'editor_css\'       => \'\',     // Additional CSS styling applied for both visual and HTML editors buttons, needs to include <style> tags, can use "scoped"
            \'editor_class\'     => \'\',     // Any extra CSS Classes to append to the Editor textarea
            \'teeny\'            => false,  // Whether to output the minimal editor configuration used in PressThis
            \'dfw\'              => false,  // Whether to replace the default fullscreen editor with DFW (needs specific DOM elements and CSS)
            \'tinymce\'          => true,   // Load TinyMCE, can be used to pass settings directly to TinyMCE using an array
            \'quicktags\'        => true,   // Load Quicktags, can be used to pass settings directly to Quicktags using an array. Set to false to remove your editor\'s Visual and Text tabs.
            \'drag_drop_upload\' => true    // Enable Drag & Drop Upload Support (since WordPress 3.9)
    );

    // display the editor
    wp_editor( $content, $editor_id, $settings );

    // display the submit button
    submit_button( \'Save Content\' );

    // add javaScript to handle the submit button click,
    // and send the form data to WP backend,
    // then refresh on success.
    ?>
    <script>
        (function($) {
            $ (\'#submit\').on (\'click\', function(e) {
                var content = $ (\'#mycustomeditor\').val ();
                $.post (\'<?php echo get_admin_url( null, \'/admin-post.php\' ) ?>\',
                        {
                            action: \'front_end_submit\',
                            id: \'<?php echo get_the_ID(); ?>\',
                            content: content
                        },
                        function(response) {

                            // looks good
                            console.log (response);

                            // reload the latest content
                            window.location.reload();
                        });
            });
        }) (jQuery);
    </script>
    <?php
}

// subscribe to the form submit event
add_action( \'admin_post_front_end_submit\', \'prefix_admin_front_end_submit\' );
add_action( \'admin_post_nopriv_front_end_submit\', \'prefix_admin_front_end_submit\' );

// handle the form submit action
function prefix_admin_front_end_submit() {

    // grab the content and post id from the POST data
    $content = $_POST[ \'content\' ];
    $id      = (int) $_POST[ \'id\' ];

    // check if the post is valid
    if( ! get_post($id) ) {
        die( "No post \'{$id}\'." );
    }

    // prep the update
    $my_post = array (
        \'ID\'           => $id,
        \'post_content\' => stripslashes( $content ),
    );

    // update the post into the database
    $result = wp_update_post( $my_post );

    // return the results
    if ( $result ) {

        // GOOD

        status_header( 200 );
        die( "Server updated \'{$id}\' from your browser." );

    } else {

        // BAD

        die( "Failed to updated \'{$id}\' from your browser." );
    }
}