[WordPress] wp_enqueue_script(), wp_enqueue_styles() で出力されるタグからtype属性を除いてHTML5ぽくしつつ、scriptタグでも条件付きコメントを使えるようにする

class-pm-scripts.php

<?php
if ( ! class_exists( 'PM_Scripts' ) ) {
class PM_Scripts Extends WP_Scripts {
    public function __construct() {
        parent :: __construct();
    }
    
    public function print_extra_script( $handle, $echo = true ) {
        if ( !$output = $this->get_data( $handle, 'data' ) )
            return;

        if ( !$echo )
            return $output;

        echo "<script>\n";
        echo "<!--\n";
        echo "$output\n";
        echo "//-->\n";
        echo "</script>\n";

        return true;
    }
    
    public function do_item( $handle, $group = false ) {
        if ( ! isset( $this->registered[$handle]) )
            return false;

        if ( 0 === $group && $this->groups[$handle] > 0 ) {
            $this->in_footer[] = $handle;
            return false;
        }

        $obj = $this->registered[ $handle ];

        if ( false === $group && in_array($handle, $this->in_footer, true) )
            $this->in_footer = array_diff( $this->in_footer, (array) $handle );

        if ( null === $obj->ver )
            $ver = '';
        else
            $ver = $obj->ver ? $obj->ver : $this->default_version;

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

        $src = $obj->src;

        if ( $this->do_concat ) {
            $srce = apply_filters( 'script_loader_src', $src, $handle );
            if ( $this->in_default_dir($srce) ) {
                $this->print_code .= $this->print_extra_script( $handle, false );
                $this->concat .= "$handle,";
                $this->concat_version .= "$handle$ver";
                return true;
            } else {
                $this->ext_handles .= "$handle,";
                $this->ext_version .= "$handle$ver";
            }
        }

        $this->print_extra_script( $handle );
        if ( !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 = esc_url( apply_filters( 'script_loader_src', $src, $handle ) );

        $end_cond = $tag = '';
        if ( isset( $obj->extra[ 'conditional' ] ) && $obj->extra[ 'conditional' ] ) {
            $tag .= "<!--[if {$obj->extra['conditional']}]>\n";
            $end_cond = "<![endif]-->\n";
        }
    
        $tag .= apply_filters( 'script_loader_tag', "<script src='$src'></script>\n", $handle );
        $tag .= $end_cond;

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

        return true;
    }
}
}

functions.php

<?php
add_filter( 'after_setup_theme', 'my_create_scripts' );
function my_create_scripts() {
    require_once( 'class-pm-scripts.php' );
    $GLOBALS['wp_scripts'] = new PM_Scripts;
}

add_filter( 'style_loader_tag', 'my_style_loader_tag' );
function my_style_loader_tag( $tag ) {
    return preg_replace( array( "| type='.+?'\s*|", "| id='.+?'\s*|", '| />|' ), array( ' ', ' ', '>' ), $tag );
}