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WordPress functions.php初期設定

Last updated at Posted at 2017-11-19

htmlデータをwordpress化する際の初期functions.phpを纏めました。

##wp本体・プラグイン更新通知を非表示する

functions.php
//WPアップデート通知を非表示
add_filter('pre_site_transient_update_core', create_function('$a', "return null;"));

//プラグイン更新通知を非表示
remove_action( 'load-update-core.php', 'wp_update_plugins' );
add_filter( 'pre_site_transient_update_plugins', create_function( '$a', "return null;" ) );

// 更新のお知らせを消すためのもの
add_action('admin_menu', 'remove_counts');
function remove_counts(){
	global $menu,$submenu;
	$menu[65][0] = 'プラグイン';
	$submenu['index.php'][10][0] = 'Updates';
}

##アイキャッチ画像
数は増やせます。

functions.php
add_theme_support( 'post-thumbnails' );
add_image_size( 'top_slider', 810, 360, true );//topスライダー
add_image_size( 'w700', 700, 0, true );//横幅700
add_image_size( 'w180', 1800, 0, true );//横幅180

##管理画面の「投稿一覧」と「固定ページ一覧」の最大表示数を変更する

functions.php
function my_edit_posts_per_page ($posts_per_page) {
	return 75;
}
add_filter('edit_posts_per_page', 'my_edit_posts_per_page');

##URLの取得 「/」区切りで配列

functions.php
function my_url(){
	$str = str_replace("/wp/", "/", $_SERVER["REQUEST_URI"]);
	$my_url['url'] = $str;
	$my_url['url'] = substr_replace($my_url['url'], "", 0,1);//一文字目の/を削除
	$my_url['path'] = explode("/", $my_url['url']);
	$my_url['url'] = "/".$my_url['url'];//一応/をいれておく。
	return $my_url;
}

##NEWマーク

functions.php
function add_new($date,$days=7){
	$new_date = date("Y-m-d", strtotime("-".$days." day"));
    if( $date > $new_date ){
        $re = '<span>New!</span>';
    }else{
    	$re = NULL;
    }
    return $re;
}

##文字数制限

functions.php
function na_trim_words($str,$int,$end='…'){
	$post_content = strip_tags($str);
	if(mb_strlen($post_content)>$int ) {
		$post_content = mb_substr($post_content,0,$int);
		$post_content = str_replace(array("\r", "\n"), '', $post_content).$end; 
	} else { 
		$post_content = str_replace(array("\r", "\n"), '', $post_content);
	}
	return $post_content;
}

##記事文章の自動整形停止

functions.php
add_action('init', function() {
    remove_filter('the_title', 'wptexturize');
    remove_filter('the_content', 'wptexturize');
    remove_filter('the_excerpt', 'wptexturize');
    remove_filter('the_title', 'wpautop');
    remove_filter('the_content', 'wpautop');
    remove_filter('the_excerpt', 'wpautop');
    remove_filter('the_editor_content', 'wp_richedit_pre');
});

##絵文字スクリプト削除

functions.php
function disable_emoji() {
     remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
     remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
     remove_action( 'wp_print_styles', 'print_emoji_styles' );
     remove_action( 'admin_print_styles', 'print_emoji_styles' );
     remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
     remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
     remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
}
add_action( 'init', 'disable_emoji' );

* page-***.php の階層を持たせるフィルター

functions.php
function my_page_template ( $template ){
	global $post;
	$post_type = get_post_type_object($post->post_type);
	if ( $post_type->hierarchical ){
		$slug = get_page_uri($post->ID);
		$slug = str_replace( '/', '-', $slug );
		$buf_template = locate_template('page-' . $slug . '.php');
		$buf_page_template = get_page_template_slug();
		if ( !empty($buf_template) && empty($buf_page_template) ){
			$template = $buf_template;
		}
	}
	return $template;
}
add_filter( 'page_template', 'my_page_template' );

##アドバンスカスタムフィールドの「画像」を扱う便利な関数
■ACF画像の呼び出し
ACF_image('項目名','サイズ','種類');
種類:photo、url、alt、title、caption
※種類とサイズは省略可能。
※ACF画像の返り値は必ず「画像オブジェクト」にする。

functions.php
function ACF_img($str,$size_name='full',$type='photo',$row=''){

	//空入力を有効に
	if($type ==''){$type = 'photo';}

	//rowを第2因数以降でも有効に
	if($size_name == 'row' || $type == 'row' ){
		$row = 'row';
		$type='photo';
		if($size_name == 'row'){
			$size_name='full';
		}
	}

	//rowの処理
	if($row != 'row'){
		$image = get_field($str);
	}else{
		//繰り返し(repeater)の画像呼び出し
		$image = get_sub_field($str);
	}

	//画像情報の読み込み
	if( !empty($image) ){
		// vars
		$url = $image['url'];
		$alt = $image['alt'];
		$title = $image['title'];
		$caption = $image['caption'];

		// Resize
		if(($size_name != '') && ($size_name != 'full')){
			$thumb = $image['sizes'][$size_name];
		}else{
			$thumb = $url;
		}

		switch ($type){
			case 'photo': 	$photo = '<img src="'.$thumb.'" alt="'.$alt.'" />';break;
			case 'url': 	$photo = $thumb;break;
			case 'alt': 	$photo = $image['alt'];break;
			case 'title': 	$photo = $image['title'];break;
			case 'caption': $photo = $image['caption'];break;
		}

		echo $photo;

	}

}
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