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WP Multibyte Patchとは?|マルチバイト機能の拡張|WordPressプラグイン

time 2018/01/23

WordPressをインストールすると最初から入っている「WP Multibyte Patch」

WP Multibyte Patch

WordPress 日本語版パッケージのためのマルチバイト機能の拡張。

ちなみにこのプラグイン、有効化する必要は…あるようです。なぜなら下記の機能があるから。

 

主な機能

投稿抜粋
「文字数ベース」抜粋の補助機能を提供します。抜粋の最大文字数と more 文字列を設定ファイルより変更できます。

文字列カウント方式の設定
言語設定が ja の場合、デフォルトで文字列カウント方式の設定を「文字数ベース」に固定します。

検索
検索の際に全角スペースを区切り文字として認識させます。また、検索文字列内の重複するスペースを取り除きます。

メール送信
送信メールのエンコーディングを JIS (ISO-2022-JP) 、UTF-8、自動判別の3つのモードから選ぶことができます。有効時のデフォルトは JIS (ISO-2022-JP) です。WordPress 本体の実装とは異なり、UTF-8 モードではボディ部も base64 エンコード (7bit) します。

トラックバック受信
日本語を含む多くのエンコーディングのデータが破壊される問題を修正します。

ピンバック受信
マルチバイト文字で書かれたページからのピンバック処理機能一式 (エンコーディング検出、変換、トリム) を実装します。

ファイル名サニタイズ
マルチバイトを含むファイル名のファイルがアップロード、またはメール添付された場合にファイル名を md5 に変換します。

フィード XML サニタイズ
フィードで出力される XML 1.0 で不正となる文字の除去と破損したマルチバイト文字の無害化を行い、検証時のエラーを防ぎます。本機能はデフォルトではオフになっておりますので、ご利用の際は wpmp-config.php を編集して有効化してください。

テーマの WEB フォント無効化機能
一部のブラウザにおいて日本語表示の不具合が起こる問題の対応として、翻訳ファイルの有無に関わらず、以下テーマの Google フォントの読み込みを任意で無効化できる機能を提供します。

Twenty Twelve
Twenty Thirteen
Twenty Fourteen
Twenty Fifteen
Twenty Sixteen
Twenty Seventeen

管理パネル
ダッシュボードの「コメント」、「下書き」でマルチバイト文字列が正しく抜粋されるようにします。
投稿エディタのリンク挿入機能で、既存コンテンツの内部リンクを検索する際のインクリメンタルサーチを2文字から動作させます。
日本語フォントの表示にあわせ、管理パネルのイタリック体を標準に変えます。

BUDDYPRESS 抜粋関数
bp_create_excerpt() でマルチバイト投稿の抜粋が作られない問題を修正します。HTML タグを取り除いた形の文字数ベースの抜粋を生成します。本機能はデフォルトではオフになっておりますので、ご利用の際は wpmp-config.php を編集して有効化してください。

 

なんとこのプラグインだけでこれだけの機能を有しています\(^o^)/
たしかにこれは有効化にしておかなれけば!!

中を見るとこんな感じでした。

wp-multibyte-patch.php

<?php
/*
Plugin Name: WP Multibyte Patch
Description: Multibyte functionality enhancement for the WordPress Japanese package.
Version: 2.8.1
Plugin URI: http://eastcoder.com/code/wp-multibyte-patch/
Author: Seisuke Kuraishi
Author URI: http://tinybit.co.jp/
License: GPLv2
Text Domain: wp-multibyte-patch
Domain Path: /languages
*/

/**
 * Multibyte functionality enhancement for the WordPress Japanese package.
 *
 * @package WP_Multibyte_Patch
 * @version 2.8.1
 * @author Seisuke Kuraishi <210pura@gmail.com>
 * @copyright Copyright (c) 2016 Seisuke Kuraishi, Tinybit Inc.
 * @license http://opensource.org/licenses/gpl-2.0.php GPLv2
 * @link http://eastcoder.com/code/wp-multibyte-patch/
 */

/**
 * @package WP_Multibyte_Patch
 */
class multibyte_patch {

    // Do not edit this section. Use wpmp-config.php instead.
    public $conf = array(
        'excerpt_mblength' => 110,
        'excerpt_more' => ' [&hellip;]',
        'comment_excerpt_mblength' => 40,
        'dashboard_recent_drafts_mblength' => 40,
        'patch_wp_mail' => false,
        'patch_incoming_trackback' => false,
        'patch_incoming_pingback' => false,
        'patch_wp_trim_excerpt' => true,
        'patch_wp_trim_words' => false,
        'patch_get_comment_excerpt' => true,
        'patch_dashboard_recent_drafts' => true,
        'patch_process_search_terms' => false,
        'patch_admin_custom_css' => false,
        'patch_wplink_js' => true,
        'patch_force_character_count' => false,
        'patch_force_twentytwelve_open_sans_off' => false,
        'patch_force_twentythirteen_google_fonts_off' => false,
        'patch_force_twentyfourteen_google_fonts_off' => false,
        'patch_force_twentyfifteen_google_fonts_off' => false,
        'patch_force_twentysixteen_google_fonts_off' => false,
        'patch_force_twentyseventeen_google_fonts_off' => false,
        'patch_sanitize_file_name' => true,
        'patch_sanitize_feed_xml_text' => false,
        'patch_bp_create_excerpt' => false,
        'bp_excerpt_mblength' => 110,
        'bp_excerpt_more' => ' [&hellip;]'
    );

    protected $blog_encoding = 'UTF-8';
    protected $has_mbfunctions = false;
    protected $mbfunctions_required = false;
    protected $has_mb_strlen = false;
    protected $debug_suffix = '';
    protected $textdomain = 'wp-multibyte-patch';
    protected $lang_dir = 'languages';
    protected $required_version = '4.5';
    protected $query_based_vars = array();
    protected $has_pcre_utf8 = false;

    // For fallback purpose only. (1.6)
    public function guess_encoding( $string, $encoding = '' ) {
        $blog_encoding = $this->blog_encoding;

        if ( !$encoding && seems_utf8( $string ) )
            return 'UTF-8';
        elseif ( !$encoding )
            return $blog_encoding;
        else
            return $encoding;
    }

    // For fallback purpose only. (1.6)
    public function convenc( $string, $to_encoding, $from_encoding = '' ) {
        $blog_encoding = $this->blog_encoding;

        if ( '' == $from_encoding )
            $from_encoding = $blog_encoding;

        if ( strtoupper( $to_encoding ) == strtoupper( $from_encoding ) )
            return $string;
        else
            return mb_convert_encoding( $string, $to_encoding, $from_encoding );
    }

    public function incoming_trackback( $commentdata ) {
        if ( 'trackback' != $commentdata['comment_type'] )
            return $commentdata;

        if ( false === $this->conf['patch_incoming_trackback'] )
            return $commentdata;

        $title = isset( $_POST['title'] ) ? wp_unslash( $_POST['title'] ) : '';
        $excerpt = isset( $_POST['excerpt'] ) ? wp_unslash( $_POST['excerpt'] ) : '';
        $blog_name = isset( $_POST['blog_name'] ) ? wp_unslash( $_POST['blog_name'] ) : '';
        $blog_encoding = $this->blog_encoding;

        $from_encoding = isset( $_POST['charset'] ) ? $_POST['charset'] : '';

        if ( !$from_encoding )
            $from_encoding = ( preg_match( "/^.*charset=([a-zA-Z0-9\-_]+).*$/i", $_SERVER['CONTENT_TYPE'], $matched ) ) ? $matched[1] : '';

        $from_encoding = str_replace( array( ',', ' ' ), '', strtoupper( trim( $from_encoding ) ) );
        $from_encoding = $this->guess_encoding( $excerpt . $title . $blog_name, $from_encoding );

        $title = $this->convenc( $title, $blog_encoding, $from_encoding );
        $blog_name = $this->convenc( $blog_name, $blog_encoding, $from_encoding );
        $excerpt = $this->convenc( $excerpt, $blog_encoding, $from_encoding );

        $title = strip_tags( $title );
        $excerpt = strip_tags( $excerpt );

        $title = ( strlen( $title ) > 250 ) ? mb_strcut( $title, 0, 250, $blog_encoding ) . '&#8230;' : $title;
        $excerpt = ( strlen( $excerpt ) > 255 ) ? mb_strcut( $excerpt, 0, 252, $blog_encoding ) . '&#8230;' : $excerpt;

        $commentdata['comment_author'] = wp_slash( $blog_name );
        $commentdata['comment_content'] = wp_slash( "<strong>$title</strong>\n\n$excerpt" );

        return $commentdata;
    }

    public function pre_remote_source( $remote_source, $pagelinkedto ) {
        $this->pingback_ping_remote_source = $remote_source;
        $this->pingback_ping_pagelinkedto = $pagelinkedto;
        return $remote_source;
    }

    public function incoming_pingback( $commentdata ) {
        if ( 'pingback' != $commentdata['comment_type'] )
            return $commentdata;

        if ( false === $this->conf['patch_incoming_pingback'] )
            return $commentdata;

        $pagelinkedto = $this->pingback_ping_pagelinkedto;
        $remote_source = $this->pingback_ping_remote_source;

        $remote_source = preg_replace( "/" . preg_quote( '<!DOC', '/' ) . "/i", '<DOC', $remote_source );
        $remote_source = preg_replace( "/[\r\n\t ]+/", ' ', $remote_source );
        $remote_source = preg_replace( "/<\/*(h1|h2|h3|h4|h5|h6|p|th|td|li|dt|dd|pre|caption|input|textarea|button|body)[^>]*>/i", "\n\n", $remote_source );

        preg_match( '|<title>([^<]*?)</title>|is', $remote_source, $matchtitle );
        $title = isset( $matchtitle[1] ) ? $matchtitle[1] : '';

        preg_match( "/<meta[^<>]+charset=\"*([a-zA-Z0-9\-_]+)\"*[^<>]*>/i", $remote_source, $matches );
        $charset = isset( $matches[1] ) ? $matches[1] : '';
        $from_encoding = $this->guess_encoding( strip_tags( $remote_source ), $charset );
        $blog_encoding = $this->blog_encoding;

        $remote_source = strip_tags( $remote_source, '<a>' );
        $remote_source = $this->convenc( $remote_source, $blog_encoding, $from_encoding );
        $p = explode( "\n\n", $remote_source );

        foreach ( $p as $para ) {
            if ( strpos( $para, $pagelinkedto ) !== false && preg_match( "/^([^<>]*)(\<a[^<>]+[\"']" . preg_quote( $pagelinkedto, '/' ) . "[\"'][^<>]*\>)([^<>]+)(\<\/a\>)(.*)$/i", $para, $context ) )
                break;
        }

        if ( !$context )
            return $commentdata;

        $context[1] = strip_tags( $context[1] );
        $context[5] = strip_tags( $context[5] );
        $len_max = 250;
        $len_c3 = strlen( $context[3] );

        if ( $len_c3 > $len_max ) {
            $excerpt = mb_strcut( $context[3], 0, 250, $blog_encoding );
        } else {
            $len_c1 = strlen( $context[1] );
            $len_c5 = strlen( $context[5] );
            $len_left = $len_max - $len_c3;
            $len_left_even = ceil( $len_left / 2 );

            if ( $len_left_even > $len_c1 ) {
                $context[5] = mb_strcut( $context[5], 0, $len_left - $len_c1, $blog_encoding );
            }
            elseif ( $len_left_even > $len_c5 ) {
                $context[1] .= "\t\t\t\t\t\t";
                $context[1] = mb_strcut( $context[1], $len_c1 - ( $len_left - $len_c5 ), $len_c1 + 6, $blog_encoding );
                $context[1] = preg_replace( "/\t*$/", '', $context[1] );
            }
            else {
                $context[1] .= "\t\t\t\t\t\t";
                $context[1] = mb_strcut( $context[1], $len_c1 - $len_left_even, $len_c1 + 6, $blog_encoding );
                $context[1] = preg_replace( "/\t*$/", '', $context[1] );
                $context[5] = mb_strcut( $context[5], 0, $len_left_even, $blog_encoding );
            }

            $excerpt = $context[1] . $context[3] . $context[5];
        }

        $commentdata['comment_content'] = '[&#8230;] ' . esc_html( $excerpt ) . ' [&#8230;]';
        $commentdata['comment_content'] = wp_slash( $commentdata['comment_content'] );
        $commentdata['comment_author'] = $this->convenc( $title, $blog_encoding, $from_encoding );
        $commentdata['comment_author'] = wp_slash( $commentdata['comment_author'] );

        return $commentdata;
    }

    public function preprocess_comment( $commentdata ) {
        if ( $commentdata['comment_type'] == 'trackback' )
            return $this->incoming_trackback( $commentdata );
        elseif ( $commentdata['comment_type'] == 'pingback' )
            return $this->incoming_pingback( $commentdata );
        else
            return $commentdata;
    }

    public function trim_multibyte_excerpt( $text = '', $length = 110, $more = ' [&hellip;]', $encoding = 'UTF-8' ) {
        $text = strip_shortcodes( $text );
        $text = str_replace( ']]>', ']]&gt;', $text );
        $text = strip_tags( $text );
        $text = trim( preg_replace( "/[\n\r\t ]+/", ' ', $text ), ' ' );

        if ( $this->mb_strlen( $text, $encoding ) > $length )
            $text = mb_substr( $text, 0, $length, $encoding ) . $more;

        return $text;
    }

    public function bp_create_excerpt( $text = '' ) {
        return $this->trim_multibyte_excerpt( $text, $this->conf['bp_excerpt_mblength'], $this->conf['bp_excerpt_more'], $this->blog_encoding );
    }

    public function bp_get_activity_content_body( $content = '' ) {
        return preg_replace( "/<a [^<>]+>([^<>]+)<\/a>(" . preg_quote( $this->conf['bp_excerpt_more'], '/' ) . "<\/p>)$/", "$1$2", $content );
    }

    public function get_comment_excerpt( $excerpt = '', $comment_ID = 0, $comment = '' ) {
        $blog_encoding = $this->blog_encoding;
        $excerpt = strip_tags( str_replace( array( "\n", "\r" ), ' ', $comment->comment_content ) );

        if ( $this->mb_strlen( $excerpt, $blog_encoding ) > $this->conf['comment_excerpt_mblength'] )
            $excerpt = mb_substr( $excerpt, 0, $this->conf['comment_excerpt_mblength'], $blog_encoding ) . '&hellip;';

        return $excerpt;
    }

    public function excerpt_mblength() {
        if ( isset( $this->query_based_vars['excerpt_mblength'] ) && (int) $this->query_based_vars['excerpt_mblength'] )
            $length = (int) $this->query_based_vars['excerpt_mblength'];
        else
            $length = (int) $this->conf['excerpt_mblength'];

        return apply_filters( 'excerpt_mblength', $length );
    }

    public function excerpt_more() {
        if ( isset( $this->query_based_vars['excerpt_more'] ) )
            return $this->query_based_vars['excerpt_more'];
        else
            return $this->conf['excerpt_more'];
    }

    public function sanitize_file_name( $name ) {
        $info = pathinfo( $name );
        $ext = !empty( $info['extension'] ) ? '.' . $info['extension'] : '';
        $name = str_replace( $ext, '', $name );
        $name_enc = rawurlencode( $name );
        $name = ( $name == $name_enc ) ? $name . $ext : md5( $name ) . $ext;
        return $name;
    }

    public function wplink_js( &$scripts ) {
        global $pagenow;

        $file = dirname( dirname( dirname( dirname( __FILE__ ) ) ) ) . "/wp-includes/js/wplink{$this->debug_suffix}.js";

        if( ! is_admin() || ! isset( $pagenow ) || ! in_array( $pagenow, array( 'post.php', 'post-new.php' ) ) || ! is_file( $file ) )
            return;

        $debug_qs = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '?sd=1' : '';

        $scripts->add( 'wplink', plugin_dir_url( __FILE__ ) . "wplink.php{$debug_qs}", array( 'jquery', 'wp-a11y' ), false, 1 );
    }

    public function force_character_count( $translations = '', $text = '', $context = '' ) {
        if ( 'word count: words or characters?' == $context && 'words' == $text )
            return 'characters';

        if ( 'Word count type. Do not translate!' == $context && 'words' == $text )
            return 'characters_including_spaces';

        return $translations;
    }

    public function force_twentytwelve_open_sans_off() {
        wp_dequeue_style( 'twentytwelve-fonts' );
    }

    public function force_twentythirteen_google_fonts_off() {
        wp_dequeue_style( 'twentythirteen-fonts' );
    }

    public function force_twentyfourteen_google_fonts_off() {
        wp_dequeue_style( 'twentyfourteen-lato' );
    }

    public function force_twentyfifteen_google_fonts_off() {
        wp_dequeue_style( 'twentyfifteen-fonts' );
    }

    public function force_twentysixteen_google_fonts_off() {
        wp_dequeue_style( 'twentysixteen-fonts' );
    }

    public function force_twentyseventeen_google_fonts_off() {
        wp_dequeue_style( 'twentyseventeen-fonts' );
    }

    public function remove_editor_style( $file = '' ) {
        global $editor_styles;

        if ( ! is_admin() || empty( $editor_styles ) || ! is_array( $editor_styles ) )
            return;

        foreach ( $editor_styles as $key => $value ) {
            if( $file === $value )
                unset( $editor_styles[$key] );
        }
    }

    public function sanitize_xml_text( $text, $replace = '' ) {
        if ( 'UTF-8' !== $this->blog_encoding || ! $this->has_pcre_utf8 )
            return $text;

        if ( $this->has_mbfunctions )
            $text = @mb_convert_encoding( $text, 'UTF-8', 'UTF-8' );
        elseif ( function_exists( 'iconv' ) )
            $text = @iconv( 'UTF-8', 'UTF-8', $text );

        return @preg_replace( '/[^\x9\xA\xD\x20-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]+/u', $replace, $text );
    }

    public function query_based_settings() {
        $is_query_funcs = array( 'is_feed', 'is_404', 'is_search', 'is_tax', 'is_front_page', 'is_home', 'is_attachment', 'is_single', 'is_page', 'is_category', 'is_tag', 'is_author', 'is_date', 'is_archive', 'is_paged' );

        foreach ( $is_query_funcs as $func ) {
            if ( isset( $this->conf['excerpt_mblength.' . $func] ) && !isset( $this->query_based_vars['excerpt_mblength'] ) && $func() )
                $this->query_based_vars['excerpt_mblength'] = $this->conf['excerpt_mblength.' . $func];

            if ( isset( $this->conf['excerpt_more.' . $func] ) && !isset( $this->query_based_vars['excerpt_more'] ) && $func() )
                $this->query_based_vars['excerpt_more'] = $this->conf['excerpt_more.' . $func];
        }
    }

    // The fallback only works with UTF-8 blog.
    public function mb_strlen( $str = '', $encoding = 'UTF-8' ) {
        if ( $this->has_mb_strlen )
            return mb_strlen( $str, $encoding );
        else
            return preg_match_all( "/./us", $str, $match );
    }

    public function is_wp_required_version( $required_version ) {
        global $wp_version;
        return version_compare( $wp_version, $required_version, '<' ) ? false : true;
    }

    public function filters_after_template_redirect() {
        if ( is_feed() ) {
            if ( false !== $this->conf['patch_sanitize_feed_xml_text'] ) {
                add_filter( 'the_title_rss', array( $this, 'sanitize_xml_text' ), 99 );
                add_filter( 'the_content_feed', array( $this, 'sanitize_xml_text' ), 99 );
                add_filter( 'the_excerpt_rss', array( $this, 'sanitize_xml_text' ), 99 );
                add_filter( 'comment_text_rss', array( $this, 'sanitize_xml_text' ), 99 );
                add_filter( 'comment_text', array( $this, 'sanitize_xml_text' ), 99 );
            }
        }
    }

    public function filters_after_setup_theme() {
        // add filter
        if ( false !== $this->conf['patch_force_character_count']) {
            if ( 'characters_including_spaces' != _x( 'words', 'Word count type. Do not translate!' ) )
            add_filter( 'gettext_with_context', array( $this, 'force_character_count' ), 10, 3 );
        }

        if ( false !== $this->conf['patch_force_twentytwelve_open_sans_off'] && 'twentytwelve' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentytwelve_open_sans_off' ), 99 );
            add_action( 'admin_print_styles-appearance_page_custom-header', array( $this, 'force_twentytwelve_open_sans_off' ), 99 );
        }

        if ( false !== $this->conf['patch_force_twentythirteen_google_fonts_off'] && 'twentythirteen' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentythirteen_google_fonts_off' ), 99 );
            add_action( 'admin_print_styles-appearance_page_custom-header', array( $this, 'force_twentythirteen_google_fonts_off' ), 99 );
        }

        if ( false !== $this->conf['patch_force_twentyfourteen_google_fonts_off'] && 'twentyfourteen' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentyfourteen_google_fonts_off' ), 99 );
            add_action( 'admin_print_scripts-appearance_page_custom-header', array( $this, 'force_twentyfourteen_google_fonts_off' ), 99 );
        }

        if ( false !== $this->conf['patch_force_twentyfifteen_google_fonts_off'] && 'twentyfifteen' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentyfifteen_google_fonts_off' ), 99 );

            if ( function_exists( 'twentyfifteen_fonts_url' ) )
                $this->remove_editor_style( twentyfifteen_fonts_url() );
        }

        if ( false !== $this->conf['patch_force_twentysixteen_google_fonts_off'] && 'twentysixteen' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentysixteen_google_fonts_off' ), 99 );

            if ( function_exists( 'twentysixteen_fonts_url' ) )
                $this->remove_editor_style( twentysixteen_fonts_url() );
        }

        if ( false !== $this->conf['patch_force_twentyseventeen_google_fonts_off'] && 'twentyseventeen' == get_template() ) {
            add_action( 'wp_enqueue_scripts', array( $this, 'force_twentyseventeen_google_fonts_off' ), 99 );

            if ( function_exists( 'twentyseventeen_fonts_url' ) )
                $this->remove_editor_style( twentyseventeen_fonts_url() );
        }
    }

    public function filters() {
        // add filter
        add_filter( 'preprocess_comment', array( $this, 'preprocess_comment' ), 99 );

        if ( false !== $this->conf['patch_incoming_pingback'] )
            add_filter( 'pre_remote_source', array( $this, 'pre_remote_source' ), 10, 2 );

        if ( false !== $this->conf['patch_wp_trim_excerpt'] ) {
            add_filter( 'excerpt_length', array( $this, 'excerpt_mblength' ), 99 );
            add_filter( 'excerpt_more', array( $this, 'excerpt_more' ), 9 );
        }

        if ( false !== $this->conf['patch_get_comment_excerpt'] )
            add_filter( 'get_comment_excerpt', array( $this, 'get_comment_excerpt' ), 10, 3 );

        if ( false !== $this->conf['patch_sanitize_file_name'] )
            add_filter( 'sanitize_file_name', array( $this, 'sanitize_file_name' ) );

        if ( false !== $this->conf['patch_bp_create_excerpt'] ) {
            add_filter( 'bp_create_excerpt', array( $this, 'bp_create_excerpt' ), 99 );
            add_filter( 'bp_get_activity_content_body', array( $this, 'bp_get_activity_content_body' ), 99 );
        }

        if ( method_exists( $this, 'wp_trim_words' ) && false !== $this->conf['patch_wp_trim_words'] )
            add_filter( 'wp_trim_words', array( $this, 'wp_trim_words' ), 99, 4 );

        // add action
        add_action( 'wp', array( $this, 'query_based_settings' ) );

        if ( method_exists( $this, 'process_search_terms' ) && false !== $this->conf['patch_process_search_terms'] )
            add_action( 'sanitize_comment_cookies', array( $this, 'process_search_terms' ) );

        if ( method_exists( $this, 'wp_mail' ) && false !== $this->conf['patch_wp_mail'] )
            add_action( 'phpmailer_init', array( $this, 'wp_mail' ) );

        if ( method_exists( $this, 'admin_custom_css' ) && false !== $this->conf['patch_admin_custom_css'] ) {
            add_action( 'admin_enqueue_scripts', array( $this, 'admin_custom_css' ), 99 );
            add_action( 'customize_controls_enqueue_scripts', array( $this, 'admin_custom_css' ), 99 );
        }

        if ( false !== $this->conf['patch_wplink_js'] )
            add_action( 'wp_default_scripts', array( $this, 'wplink_js' ), 9 );

        add_action( 'after_setup_theme', array( $this, 'filters_after_setup_theme' ), 99 );
        add_action( 'template_redirect', array( $this, 'filters_after_template_redirect' ) );
    }

    public function mbfunctions_exist() {
        return (
            function_exists( 'mb_convert_encoding' ) &&
            function_exists( 'mb_convert_kana' ) &&
            function_exists( 'mb_detect_encoding' ) &&
            function_exists( 'mb_strcut' ) &&
            function_exists( 'mb_strlen' )
        ) ? true : false;
    }

    public function activation_check() {
        $required_version = $this->required_version;

        if ( !$this->is_wp_required_version( $required_version ) ) {
            deactivate_plugins( __FILE__ );
            exit( sprintf( __( 'Sorry, WP Multibyte Patch requires WordPress %s or later.', 'wp-multibyte-patch' ), $required_version ) );
        }
        elseif ( !$this->has_mbfunctions && $this->mbfunctions_required ) {
            deactivate_plugins( __FILE__ );
            exit( __( 'Sorry, WP Multibyte Patch requires <a href="http://www.php.net/manual/en/mbstring.installation.php" target="_blank">mbstring</a> functions.', 'wp-multibyte-patch' ) );
        }
    }

    public function load_conf() {
        $wpmp_conf = array();

        if ( file_exists( WP_CONTENT_DIR . '/wpmp-config.php' ) )
            require_once WP_CONTENT_DIR . '/wpmp-config.php';

        if ( is_multisite() ) {
            $blog_id = get_current_blog_id();
            if ( file_exists( WP_CONTENT_DIR . '/wpmp-config-blog-' . $blog_id . '.php' ) )
                require_once WP_CONTENT_DIR . '/wpmp-config-blog-' . $blog_id . '.php';
        }

        $this->conf = array_merge( $this->conf, $wpmp_conf );
    }

    public function __construct() {
        $this->load_conf();
        $this->blog_encoding = get_option( 'blog_charset' );

        if ( preg_match( '/^utf-?8$/i', $this->blog_encoding ) || empty( $this->blog_encoding ) )
            $this->blog_encoding = 'UTF-8';

        // mbstring functions are required for non UTF-8 blog.
        if ( 'UTF-8' !== $this->blog_encoding )
            $this->mbfunctions_required = true;

        $this->has_mbfunctions = $this->mbfunctions_exist();
        $this->has_mb_strlen = function_exists( 'mb_strlen' );
        $this->has_pcre_utf8 = @preg_match( '/^.$/u', "\xC2\xA9" );
        $this->debug_suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';

        load_plugin_textdomain( $this->textdomain, false, dirname( plugin_basename( __FILE__ ) ) . '/' . $this->lang_dir );
        register_activation_hook( __FILE__, array( $this, 'activation_check' ) );
        $this->filters();
    }
}

if ( defined( 'WP_PLUGIN_URL' ) ) {
    if ( file_exists( dirname( __FILE__ ) . '/ext/' . get_locale() . '/class.php' ) ) {
        require_once dirname( __FILE__ ) . '/ext/' . get_locale() . '/class.php';
        $GLOBALS['wpmp'] = new multibyte_patch_ext();
    }
    elseif ( file_exists( dirname( __FILE__ ) . '/ext/default/class.php' ) ) {
        require_once dirname( __FILE__ ) . '/ext/default/class.php';
        $GLOBALS['wpmp'] = new multibyte_patch_ext();
    }
    else
        $GLOBALS['wpmp'] = new multibyte_patch();
}

 

おぉぉ、意味が分からない…(^^;

いや、分からないと言っていてはまだ甘いのでしょうが…

これから少しずつ理解していきます\(^o^)/

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