I wanted to create a plugin to batch manage posts' custom field data. I know I can add post meta by add a meta box in post edit screen and use add_action('save_post','function_to_update_meta') to trigger add meta functions.

But I don't know how to trigger the add_post_meta function in a admin menu page (such as a custom admin menu). How to do that?

Thank you in advance!

  • What are you referring as "batch manage" ? Is it like the Bulk Actions of the Posts/Pages screen /wp-admin/edit.php?post_type=page? What "custom admin menu" is this?
    – brasofilo
    Commented Jul 28, 2012 at 11:28
  • "batch manage" is a function I wanted to achieve in my plugin,it is like the "bulk action" in posts/pages screen. But posts/pages screen don't have options to bult edit the posts/pages meta, so I want to create a plugin to do that. The interface of this plugin have to in a separate menu, a menu added by "add_menu_pages".
    – Daiwei
    Commented Jul 28, 2012 at 17:58
  • Is this useful? ilovecolors.com.ar/…
    – brasofilo
    Commented Jul 28, 2012 at 18:21

2 Answers 2


You will need to use an Ajax function. Which requires javascript to send the form data to your php Ajax function which you can use to run update_post_meta();


Form Html:

<input id="meta" type ="text" name="2344" value="<?php echo esc_html( get_post_meta( 2344, '_your_key', true) ); ?>" />


jQuery(document).ready(function() {
    jQuery("form").submit(function() {
    var post_meta = jQuery("input name=[2344]").val();
    var ID = jQuery(this).attr("name");

           type: "POST",
           url: ajaxurl,
           data: {
           action: "update_meta",
           post_id: ID,
           meta: post_meta,
        success: function( data ) {
          //do something
 return false;


PHP function:

add_action( 'wp_ajax_update_meta', 'my_function' );
function my_function() {
   $post_id = $_POST['post_id'];
   $meta = $_POST['post_meta'];

  update_post_meta( $post_id, '_your_key', $meta );

  echo 'Meta Updated';
  • Looks cool, let me try that
    – Daiwei
    Commented Jul 28, 2012 at 17:58
  • Sorry take so long to test it, it worked very well. Thank you!
    – Daiwei
    Commented Aug 3, 2012 at 14:40

I added some console.log function for testing, but this is basically doning the same thing as @Chris_() answer:

Menu callback function to generate menu content (PHP):

function ajax_menu_callback() {
<div class="wrap">
    <div id="icon-themes" class="icon32"></div>
    <br />
        <input id="meta" type ="text" name="1" value="<?php echo esc_html( get_post_meta( 1, 'your_key', true) ); ?>" />
        <?php submit_button(); ?>

Then the javascript to print on the admin side (javascript, don't forget to include a jquery library):

jQuery(document).ready(function() {
    $("form").submit(function() {
        console.log('Submit Function');
        var postMeta = $('input[name="1"]').val();
        var postID = 1;
        var button = $('input[type="submit"]');
            data: {action: "update_meta", post_id: postID, post_meta: postMeta, },
            type: 'POST',
            url: ajaxurl,
            success: function( response ) { console.log('Well Done and got this from sever: ' + response); }
        }); // end of ajax()
        return false;
    }); // end of document.ready
}); // end of form.submit

Then the PHP function handle update_post_meta (PHP):

add_action( 'wp_ajax_update_meta', 'my_ajax_callback' );
function my_ajax_callback() {
    $post_id = $_POST['post_id'];
    $post_meta = $_POST['post_meta'];
    update_post_meta( $post_id, 'your_key', $post_meta );
    echo 'Meta Updated';
} // end of my_ajax_callback()

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