body-classer.php

<?php
/*
Plugin Name: Sizeable Body Classer
Author: theandystratton
Author URI: http://sizeableinteractive.com
Description: Add to your functions.php to have quick functions for adding body classes. Simply run the following code before get_header(): szbl_add_body_class( 'some-body-class' );
Version: 0.1
License: GPL2
*/
function szbl_add_body_class( $class, $return = false )
{
    static $classes;
    
    if ( is_null( $classes ) )
        $classes = array();
    
    if ( $return )
        return $classes;
        
    $classes[] = $class;
}

add_filter( 'body_class', 'szbl_body_class_filter' );
function szbl_body_class_filter( $classes )
{
    $new_classes = szbl_add_body_class( '', true );
    $classes[] = implode( ' ', $new_classes );
    return $classes;
}