Warning Code

<?php

class WP_LESS_Styles extends WP_Dependencies {
    var $base_url;
    var $content_url;
    var $default_version;
    var $text_direction = 'ltr';
    var $concat = '';
    var $concat_version = '';
    var $do_concat = false;
    var $print_html = '';
    var $default_dirs;

    function __construct() {
        do_action_ref_array( 'wp_default_less_styles', array(&$this) );
    }

    function do_item( $handle ) {
        if ( !parent::do_item($handle) )
            return false;

        if ( null === $this->registered[$handle]->ver )
            $ver = '';
        else
            $ver = $this->registered[$handle]->ver ? $this->registered[$handle]->ver : $this->default_version;

        if ( isset($this->args[$handle]) )
            $ver = $ver ? $ver . '&amp;' . $this->args[$handle] : $this->args[$handle];

        if ( $this->do_concat ) {
            if ( $this->in_default_dir($this->registered[$handle]->src) && !isset($this->registered[$handle]->extra['conditional']) && !isset($this->registered[$handle]->extra['alt']) ) {
                $this->concat .= "$handle,";
                $this->concat_version .= "$handle$ver";
                return true;
            }
        }

        if ( isset($this->registered[$handle]->args) )
            $media = esc_attr( $this->registered[$handle]->args );
        else
            $media = 'all';

        $href = $this->_css_href( $this->registered[$handle]->src, $ver, $handle );
        $rel = isset($this->registered[$handle]->extra['alt']) && $this->registered[$handle]->extra['alt'] ? 'alternate stylesheet' : 'stylesheet/less';
        $title = isset($this->registered[$handle]->extra['title']) ? "title='" . esc_attr( $this->registered[$handle]->extra['title'] ) . "'" : '';

        $end_cond = $tag = '';
        if ( isset($this->registered[$handle]->extra['conditional']) && $this->registered[$handle]->extra['conditional'] ) {
            $tag .= "<!--[if {$this->registered[$handle]->extra['conditional']}]>\n";
            $end_cond = "<![endif]-->\n";
        }

        $tag .= apply_filters( 'style_loader_tag', "<link rel='$rel' href='$href' media='screen' />\n", $handle );
        if ( 'rtl' === $this->text_direction && isset($this->registered[$handle]->extra['rtl']) && $this->registered[$handle]->extra['rtl'] ) {
            if ( is_bool( $this->registered[$handle]->extra['rtl'] ) ) {
                $suffix = isset( $this->registered[$handle]->extra['suffix'] ) ? $this->registered[$handle]->extra['suffix'] : '';
                $rtl_href = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $this->_css_href( $this->registered[$handle]->src , $ver, "$handle-rtl" ));
            } else {
                $rtl_href = $this->_css_href( $this->registered[$handle]->extra['rtl'], $ver, "$handle-rtl" );
            }

            $tag .= apply_filters( 'style_loader_tag', "<link rel='$rel' id='$handle-rtl-css' $title href='$rtl_href' type='text/css' media='$media' />\n", $handle );
        }

        $tag .= $end_cond;

        if ( $this->do_concat )
            $this->print_html .= $tag;
        else
            echo $tag;

        return true;
    }

    function all_deps( $handles, $recursion = false, $group = false ) {
        $r = parent::all_deps( $handles, $recursion );
        if ( !$recursion )
            $this->to_do = apply_filters( 'print_less_styles_array', $this->to_do );
        return $r;
    }

    function _css_href( $src, $ver, $handle ) {
        if ( !is_bool($src) && !preg_match('|^https?://|', $src) && ! ( $this->content_url && 0 === strpos($src, $this->content_url) ) ) {
            $src = $this->base_url . $src;
        }

        if ( !empty($ver) )
            $src = add_query_arg('ver', $ver, $src);
        $src = apply_filters( 'style_loader_src', $src, $handle );
        return esc_url( $src );
    }

    function in_default_dir($src) {
        if ( ! $this->default_dirs )
            return true;

        foreach ( (array) $this->default_dirs as $test ) {
            if ( 0 === strpos($src, $test) )
                return true;
        }
        return false;
    }

}