Wordpress - Change the text on the Publish button

If you look into /wp-admin/edit-form-advanced.php, you will find the meta box:

add_meta_box('submitdiv', __('Publish'), 'post_submit_meta_box', $post_type, 'side', 'core');

Note the __('Publish') – the function __() leads to translate() where you get the filter 'gettext'.

There are two ways to handle your problem: 1. Address the string in a single specialized function (be sure to match the correct textdomain!) or 2. use a more generic approach.

@Rarst has just now posted version 1, so I'll add version 2. :)

<?php
/*
Plugin Name: Retranslate
Description: Adds translations.
Version:     0.1
Author:      Thomas Scholz
Author URI:  http://toscho.de
License:     GPL v2
*/

class Toscho_Retrans {
    // store the options
    protected $params;

    /**
     * Set up basic information
     * 
     * @param  array $options
     * @return void
     */
    public function __construct( array $options )
    {
        $defaults = array (
            'domain'       => 'default'
        ,   'context'      => 'backend'
        ,   'replacements' => array ()
        ,   'post_type'    => array ( 'post' )
        );

        $this->params = array_merge( $defaults, $options );

        // When to add the filter
        $hook = 'backend' == $this->params['context'] 
            ? 'admin_head' : 'template_redirect';

        add_action( $hook, array ( $this, 'register_filter' ) );
    }

    /**
     * Conatiner for add_filter()
     * @return void
     */
    public function register_filter()
    {
        add_filter( 'gettext', array ( $this, 'translate' ), 10, 3 );
    }

    /**
     * The real working code.
     * 
     * @param  string $translated
     * @param  string $original
     * @param  string $domain
     * @return string
     */
    public function translate( $translated, $original, $domain )
    {
        // exit early
        if ( 'backend' == $this->params['context'] )
        {
            global $post_type;

            if ( ! empty ( $post_type ) 
                && ! in_array( $post_type, $this->params['post_type'] ) )
            {
                return $translated;
            }
        }

        if ( $this->params['domain'] !== $domain )
        {
            return $translated;
        }

        // Finally replace
        return strtr( $original, $this->params['replacements'] );
    }
}

// Sample code
// Replace 'Publish' with 'Save' and 'Preview' with 'Lurk' on pages and posts
$Toscho_Retrans = new Toscho_Retrans(
    array (
        'replacements' => array ( 
            'Publish' => 'Save'
        ,   'Preview' => 'Lurk' 
        )
    ,   'post_type'    => array ( 'page', 'post' )
    )
);

You don't need to use the code as a plugin. Including it in your theme's functions.php will be enough.

Update

To remove the original Save button (not sure what the 'draft' button is), add the following code to your functions.php/a plugin:

add_action( 'admin_print_footer_scripts', 'remove_save_button' );
function remove_save_button()
{   
?>
<script>
jQuery(document).ready(function($){$('#save-post').remove();});
</script><?php
}

Yes, it's ugly.


The code for hakre's suggestion to use translation filter would be something like this:

add_filter( 'gettext', 'change_publish_button', 10, 2 );

function change_publish_button( $translation, $text ) {

if ( $text == 'Publish' )
    return 'Save';

return $translation;
}

This is not a full answer but some directions: Any text displayed surpasses a translation filter and can therefore be changed in a callback function (hook). So if the hook is only registered on the page where you would like to change that, job done.

The draft button could be "removed" by hiding it via CSS. The CSS could be injected into the <head>-tag of the admin with another callback. I think the filter is called admin_head for that. It's somehow dirty as the button still is there, for example if a user switches CSS off.

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