PHP Warning: Attempt to read property "ID" on null\r\nPHP Warning: Attempt to read property "post_name" on null\r\nPHP Warning: Undefined variable $post\r\nPHP Warning: Undefined array key \"post\"\r\n<\/code><\/pre>\r\n\u3053\u308c\u3089\u306f\u3001 $post\u5909\u6570<\/code>, $_GET['post']<\/code> \u304c\u5b58\u5728\u3057\u306a\u3044\u72b6\u614b\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u969b\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc<\/b> \u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u3092\u6839\u672c\u304b\u3089\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\r\n\r\n \r\n<\/ul>\r\n<\/ins>\r\n\r\n\r\n\r\n\r\n
\r\n\r\n\r\n\r\n\r\n\r\n\r\n1. \u306a\u305c$post\u304cnull\u306b\u306a\u308b\u306e\u304b<\/h2>\r\n\r\n$post\u304cnull\u306b\u306a\u308b\u4e3b\u306a\u30b1\u30fc\u30b9<\/h3>\r\n
WordPress \u306e $post<\/code> \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067 null<\/code> \u307e\u305f\u306f\u672a\u5b9a\u7fa9\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\r\n\r\n \r\n \r\n \u30b1\u30fc\u30b9<\/th>\r\n \u8aac\u660e<\/td>\r\n <\/tr>\r\n <\/thead>\r\n \r\n \r\n \u30a2\u30fc\u30ab\u30a4\u30d6\u30da\u30fc\u30b8<\/b><\/th>\r\n \u30ab\u30c6\u30b4\u30ea\u30fc\u3001\u30bf\u30b0\u3001\u65e5\u4ed8\u30a2\u30fc\u30ab\u30a4\u30d6\u306a\u3069<\/td>\r\n <\/tr>\r\n \r\n 404\u30da\u30fc\u30b8<\/b><\/th>\r\n \u5b58\u5728\u3057\u306a\u3044URL\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u5834\u5408<\/td>\r\n <\/tr>\r\n \r\n \u691c\u7d22\u7d50\u679c\u30da\u30fc\u30b8<\/b><\/th>\r\n \u7279\u5b9a\u306e\u6295\u7a3f\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u304c\u306a\u3044<\/td>\r\n <\/tr>\r\n \r\n \u30ab\u30b9\u30bf\u30e0\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8<\/b><\/th>\r\n \u30eb\u30fc\u30d7\u5916\u3067$post<\/code>\u3092\u53c2\u7167\u3057\u305f\u5834\u5408<\/td>\r\n <\/tr>\r\n \r\n \u95a2\u6570\u5185\u90e8<\/b><\/th>\r\n global $post;<\/code> \u5ba3\u8a00\u306a\u3057\u3067\u4f7f\u7528<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n<\/table>\r\n\r\n\u30a8\u30e9\u30fc\u304c\u983b\u767a\u3059\u308b\u7406\u7531<\/h3>\r\n
\u591a\u304f\u306e\u30c6\u30fc\u30de\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u300c\u5371\u967a\u306a\u30b3\u30fc\u30c9\u300d\u304c\u6563\u5728\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\r\n
\/\/ \u274c \u5371\u967a\uff1a$post\u306e\u5b58\u5728\u78ba\u8a8d\u306a\u3057\r\n$slug = $post->post_name;\r\n$custom_field = get_post_meta($post->ID, 'key', true);\r\n<\/code><\/pre>\r\n\u3053\u308c\u3089\u306f\u6295\u7a3f\u30fb\u56fa\u5b9a\u30da\u30fc\u30b8\u3067\u306f\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u30a2\u30fc\u30ab\u30a4\u30d6\u30da\u30fc\u30b8\u3084404\u30da\u30fc\u30b8\u3067\u30a8\u30e9\u30fc\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\r\n
\r\n\r\n\r\n2. \u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3<\/h2>\r\n\r\n\u30d1\u30bf\u30fc\u30f31: post_name\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9<\/h3>\r\n
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8:<\/b><\/p>\r\nPHP Warning: Attempt to read property "post_name" on null\r\n<\/code><\/pre>\r\n\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\n$slug = $post->post_name;\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\nglobal $post;\r\n$slug = isset($post->post_name) ? $post->post_name : '';\r\n<\/code><\/pre>\r\n
\r\n\r\n\u30d1\u30bf\u30fc\u30f32: ID\u3092\u4f7f\u3063\u305fget_post_meta()<\/h3>\r\n
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8:<\/b><\/p>\r\nPHP Warning: Attempt to read property "ID" on null\r\n<\/code><\/pre>\r\n\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\n$custom_description = get_post_meta($post->ID, '_meta_description', true);\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\nglobal $post;\r\nif ($post && isset($post->ID)) {\r\n $custom_description = get_post_meta($post->ID, '_meta_description', true);\r\n if (!empty($custom_description)) {\r\n return $custom_description;\r\n }\r\n}\r\n<\/code><\/pre>\r\n
\r\n\r\n\u30d1\u30bf\u30fc\u30f33: get_post_ancestors()\u3067\u306e\u4f7f\u7528<\/h3>\r\n
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8:<\/b><\/p>\r\nPHP Warning: Undefined variable $post\r\n<\/code><\/pre>\r\n\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\n$ancestors_ids = array_reverse(get_post_ancestors($post));\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\nglobal $post;\r\nif ($post && isset($post->ID)) {\r\n $ancestors_ids = array_reverse(get_post_ancestors($post));\r\n foreach ($ancestors_ids as $ancestors_id) {\r\n \/\/ \u51e6\u7406\r\n }\r\n}\r\n<\/code><\/pre>\r\n
\r\n\r\n\u30d1\u30bf\u30fc\u30f34: \u30ab\u30c6\u30b4\u30ea\u30fc\u914d\u5217\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9<\/h3>\r\n
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8:<\/b><\/p>\r\nPHP Warning: Trying to access array offset on value of type bool\r\n<\/code><\/pre>\r\n\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\n$category = get_the_category();\r\n$cat_name = $category[0]->cat_name;\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\nif (has_category()) {\r\n $category = get_the_category();\r\n if (!empty($category)) {\r\n $cat_id = $category[0]->cat_ID;\r\n $cat_link = get_category_link($cat_id);\r\n $cat_slug = $category[0]->category_nicename;\r\n $cat_name = $category[0]->cat_name;\r\n }\r\n}\r\n<\/code><\/pre>\r\n
\r\n\r\n\u30d1\u30bf\u30fc\u30f35: \u30bf\u30b0\u914d\u5217\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9<\/h3>\r\n
\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\n$posttags = get_the_tags();\r\n$tag_name = $posttags[0]->name;\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\nif (has_tag()) {\r\n $posttags = get_the_tags();\r\n if (!empty($posttags)) {\r\n $tag_name = $posttags[0]->name;\r\n $tag_id = $posttags[0]->term_id;\r\n $tag_link = get_tag_link($tag_id);\r\n }\r\n}\r\n<\/code><\/pre>\r\n
\r\n\r\n\u30d1\u30bf\u30fc\u30f36: $_GET\u914d\u5217\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\uff08\u7ba1\u7406\u753b\u9762\uff09<\/h3>\r\n
\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8:<\/b><\/p>\r\nPHP Warning: Undefined array key "post" in admin-style.php\r\n<\/code><\/pre>\r\n\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9:<\/b><\/p>\r\nfunction disable_visual_editor_in_page() {\r\n global $typenow;\r\n $post_id = $_GET['post']; \/\/\u274c \u65b0\u898f\u4f5c\u6210\u6642\u306b\u5b58\u5728\u3057\u306a\u3044\r\n \r\n if ($typenow == 'page') {\r\n if (!in_array($post_id, array('1', '2'), true)) {\r\n add_filter('user_can_richedit', 'disable_visual_editor_filter');\r\n }\r\n }\r\n}\r\n<\/code><\/pre>\r\n\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0:<\/b><\/p>\r\n\r\n- \u7ba1\u7406\u753b\u9762\u3067\u300c\u65b0\u898f\u6295\u7a3f\u3092\u8ffd\u52a0\u300d\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u6642<\/li>\r\n
$_GET['post']<\/code> \u306f\u7de8\u96c6\u6642\u306e\u307f\u5b58\u5728\u3057\u3001\u65b0\u898f\u4f5c\u6210\u6642\u306f\u672a\u5b9a\u7fa9<\/li>\r\n<\/ul>\r\n\r\n\u4fee\u6b63\u5f8c\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u8a2d\u5b9a\uff09:<\/b><\/p>\r\nfunction disable_visual_editor_in_page() {\r\n global $typenow;\r\n \r\n \/\/\u6295\u7a3fID\u3092\u53d6\u5f97\uff08\u7de8\u96c6\u6642\u306e\u307f\u3001\u65b0\u898f\u4f5c\u6210\u6642\u306f0\uff09\r\n $post_id = isset($_GET['post']) ? intval($_GET['post']) : 0;\r\n \r\n \/\/\u65b0\u898f\u4f5c\u6210\u6642\uff08$post_id = 0\uff09\u306f\u4f55\u3082\u3057\u306a\u3044\r\n if ($post_id === 0) {\r\n return;\r\n }\r\n\r\n \/\/\u7279\u5b9a\u306e\u56fa\u5b9a\u30da\u30fc\u30b8\u3067\u306e\u307f\u30d3\u30b8\u30e5\u30a2\u30eb\u30a8\u30c7\u30a3\u30bf\u3092\u3010\u8868\u793a\u3011\r\n if ($typenow == 'page') {\r\n if (!in_array($post_id, array(1, 2), true)) {\r\n add_filter('user_can_richedit', 'disable_visual_editor_filter');\r\n }\r\n }\r\n}\r\n<\/code><\/pre>\r\n\r\n\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5411\u4e0a\u306e\u30dd\u30a4\u30f3\u30c8:<\/b><\/p>\r\n\r\nintval()<\/code> \u3067\u6574\u6570\u306b\u5909\u63db<\/li>\r\n- \u6587\u5b57\u5217
'1'<\/code> \u3067\u306f\u306a\u304f\u6574\u6570 1<\/code> \u3067\u6bd4\u8f03<\/li>\r\n<\/ul>\r\n\u9069\u7528\u3059\u308b\u30d5\u30c3\u30af:<\/b><\/p>\r\nadd_action('load-post.php', 'disable_visual_editor_in_page'); \/\/\u7de8\u96c6\u753b\u9762\r\nadd_action('load-post-new.php', 'disable_visual_editor_in_page'); \/\/\u65b0\u898f\u4f5c\u6210\u753b\u9762\r\n<\/code><\/pre>\r\n
\r\n\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u8a72\u5f53\u3059\u308b\u5834\u6240:<\/b><\/p>\r\n\r\nadmin-style.php<\/code><\/li>\r\n- \u30ab\u30b9\u30bf\u30e0\u7ba1\u7406\u753b\u9762\u306e\u30b3\u30fc\u30c9<\/li>\r\n
$_GET<\/code>\u3001$_POST<\/code>\u3001$_REQUEST<\/code> \u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u7b87\u6240<\/li>\r\n<\/ul>\r\n
\r\n\r\n\r\n\r\n3. \u57fa\u672c\u7684\u306a\u4fee\u6b63\u65b9\u6cd5<\/h2>\r\n\r\n\u9244\u52471: \u5fc5\u305a\u5b58\u5728\u78ba\u8a8d\u3092\u3059\u308b<\/h3>\r\n\/\/ \u274c NG\r\n$value = $post->post_name;\r\n\r\n\/\/ \u2705 OK\r\nif ($post && isset($post->post_name)) {\r\n $value = $post->post_name;\r\n}\r\n<\/code><\/pre>\r\n\r\n\u9244\u52472: global\u5ba3\u8a00\u3092\u5fd8\u308c\u306a\u3044<\/h3>\r\n
\u95a2\u6570\u5185\u3084\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u3067$post<\/code>\u3092\u4f7f\u3046\u5834\u5408\uff1a<\/p>\r\nfunction my_custom_function() {\r\n global $post; \/\/ \ud83d\udc48 \u3053\u308c\u3092\u5fd8\u308c\u305a\u306b\uff01\r\n \r\n if ($post && isset($post->ID)) {\r\n \/\/ \u51e6\u7406\r\n }\r\n}\r\n<\/code><\/pre>\r\n\r\n\u9244\u52473: \u914d\u5217\u306f\u7a7a\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046<\/h3>\r\n\/\/ \u274c NG\r\n$category = get_the_category();\r\n$name = $category[0]->cat_name;\r\n\r\n\/\/ \u2705 OK\r\n$category = get_the_category();\r\nif (!empty($category)) {\r\n $name = $category[0]->cat_name;\r\n}\r\n<\/code><\/pre>\r\n
\r\n\r\n\r\n4. \u30d5\u30a1\u30a4\u30eb\u5225\u306e\u5177\u4f53\u7684\u306a\u4fee\u6b63\u4f8b<\/h2>\r\n\r\nheader.php \u306e\u4fee\u6b63<\/h3>\r\n
\u4fee\u6b63\u7b87\u6240: \u30e1\u30bf\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u751f\u6210\u95a2\u6570<\/b><\/p>\r\n<?php\r\nfunction generate_meta_description() {\r\n global $post;\r\n \r\n $site_name = get_bloginfo('name');\r\n $page_title = is_home() || is_front_page() ? '' : get_the_title();\r\n \r\n \/\/ \u30ab\u30b9\u30bf\u30e0\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u53d6\u5f97\uff08\u5b89\u5168\u306b\uff09\r\n if ($post && isset($post->ID)) {\r\n $custom_description = get_post_meta($post->ID, '_meta_description', true);\r\n if (!empty($custom_description)) {\r\n return $custom_description;\r\n }\r\n }\r\n \r\n \/\/ \u629c\u7c8b\u306e\u53d6\u5f97\r\n if ($post && has_excerpt()) {\r\n return get_the_excerpt();\r\n }\r\n \r\n \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\r\n if (!empty($page_title)) {\r\n return "{$site_name}\u306e{$page_title}\u30da\u30fc\u30b8\u3067\u3059\u3002";\r\n } else {\r\n return get_bloginfo('description');\r\n }\r\n}\r\n?>\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u7b87\u6240: body_class\u3078\u306e\u30ab\u30b9\u30bf\u30e0\u30bf\u30af\u30bd\u30ce\u30df\u30fc\u8ffd\u52a0<\/b><\/p>\r\n<?php\r\n\/* \u30da\u30fc\u30b8\u30bf\u30b0\uff08CPT UI\uff09\u30af\u30e9\u30b9\u3092\u3001body_class \u306b\u8ffd\u52a0 *\/\r\nif (is_singular()) {\r\n $term_slug_pg = '';\r\n global $post;\r\n if (isset($post) && $post) {\r\n $terms_pg = get_the_terms($post->ID, 'pg');\r\n if ($terms_pg && !is_wp_error($terms_pg)) {\r\n foreach ($terms_pg as $term_pg) {\r\n $term_slug_pg = $term_pg->slug;\r\n }\r\n }\r\n }\r\n}\r\n?>\r\n<\/code><\/pre>\r\n
\r\n\r\nindex.php \u306e\u4fee\u6b63<\/h3>\r\n
\u4fee\u6b63\u524d:<\/b><\/p>\r\n<?php\r\n$slug = $post->post_name;\r\nif (has_category()) {\r\n $category = get_the_category();\r\n $cat_id = $category[0]->cat_ID;\r\n $cat_name = $category[0]->cat_name;\r\n}\r\n?>\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\n<?php\r\nglobal $post;\r\n$slug = isset($post->post_name) ? $post->post_name : '';\r\n\r\nif (has_category()) {\r\n $category = get_the_category();\r\n if (!empty($category)) {\r\n $cat_id = $category[0]->cat_ID;\r\n $cat_link = get_category_link($cat_id);\r\n $cat_slug = $category[0]->category_nicename;\r\n $cat_name = $category[0]->cat_name;\r\n }\r\n}\r\n\r\nif (has_tag()) {\r\n $posttags = get_the_tags();\r\n if (!empty($posttags)) {\r\n $tag_name = $posttags[0]->name;\r\n $tag_id = $posttags[0]->term_id;\r\n $tag_link = get_tag_link($tag_id);\r\n }\r\n}\r\n?>\r\n<\/code><\/pre>\r\n
\r\n\r\nsingle.php \/ page.php \u306e\u4fee\u6b63<\/h3>\r\n
\u4fee\u6b63\u524d:<\/b><\/p>\r\n<?php\r\n$slug = $post->post_name;\r\nif (has_category()) {\r\n $category = get_the_category();\r\n $cat_name = $category[0]->cat_name;\r\n}\r\n?>\r\n<\/code><\/pre>\r\n\u4fee\u6b63\u5f8c:<\/b><\/p>\r\n<?php\r\nglobal $post;\r\n$slug = isset($post->post_name) ? $post->post_name : '';\r\n\r\nif (has_category()) {\r\n $categories = get_the_category();\r\n if (!empty($categories)) {\r\n $category = $categories[0];\r\n $cat_id = $category->cat_ID;\r\n $cat_link = get_category_link($cat_id);\r\n $cat_slug = $category->category_nicename;\r\n $cat_name = $category->cat_name;\r\n }\r\n}\r\n\r\nif (has_tag()) {\r\n $posttags = get_the_tags();\r\n if (!empty($posttags)) {\r\n $tag_name = $posttags[0]->name;\r\n $tag_id = $posttags[0]->term_id;\r\n $tag_link = get_tag_link($tag_id);\r\n }\r\n}\r\n?>\r\n<\/code><\/pre>\r\n
\r\n\r\nbreadcrumb.php \u306e\u4fee\u6b63<\/h3>\r\n
\u30d1\u30f3\u304f\u305a\u30ea\u30b9\u30c8\u3067\u3082$post<\/code>\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5192\u982d\u3067\u5ba3\u8a00\uff1a<\/p>\r\n<!-- breadcrumb.php -->\r\n<?php global $post; ?>\r\n<nav class="breadcrumb leckermaul mx-auto py-0.5r">\r\n <ul class="breadcrumb-wrapper">\r\n <li><a href="<?php echo home_url('\/'); ?>"><i><\/i>\u30c8\u30c3\u30d7<\/a><\/li>\r\n \r\n <?php if (is_single() && get_post_type() === 'post' && !is_404()) : ?>\r\n <!-- \u6295\u7a3f\u30da\u30fc\u30b8\u306e\u51e6\u7406 -->\r\n <?php else : ?>\r\n <!-- \u56fa\u5b9a\u30da\u30fc\u30b8\u306e\u51e6\u7406 -->\r\n <?php\r\n if ($post && has_category()) {\r\n $ancestors_ids = array_reverse(get_post_ancestors($post));\r\n foreach ($ancestors_ids as $ancestors_id) {\r\n echo '<li><a href="' . get_page_link($ancestors_id) . '">';\r\n echo wp_strip_all_tags(get_page($ancestors_id)->post_title, false);\r\n echo '<\/a><\/li>';\r\n }\r\n }\r\n ?>\r\n <?php endif; ?>\r\n <\/ul>\r\n<\/nav>\r\n<\/code><\/pre>\r\n
\r\n\r\n\r\n5. \u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3067\u4e00\u5143\u7ba1\u7406\u3059\u308b\u65b9\u6cd5<\/h2>\r\n\r\nfunctions.php \u3067\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u8a2d\u5b9a<\/h3>\r\n
\u540c\u3058\u30b3\u30fc\u30c9\u3092\u5404\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306b\u66f8\u304f\u306e\u306f\u975e\u52b9\u7387\u3067\u3059\u3002functions.php<\/code> \u3067\u4e00\u5143\u7ba1\u7406\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\r\nshortcodes.php\uff08functions\u5185\uff1ainclude('~\/shortcodes.php');\uff09 \u306b\u8ffd\u52a0:<\/b><\/p>\r\n<?php\r\n\/* \u25a0 \u6295\u7a3f\u60c5\u5831\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u8a2d\u5b9a\r\n\u0fd0\u0f36\u22b0\u27e1\u22b1\u0f36\u22b0\u27e1\u22b1\u0f36\u22b0\u27e1\u22b1\u0f36\u2740\u0f36\u22b0\u27e1\u22b1\u0f36\u22b0\u27e1\u22b1\u0f36\u22b0\u27e1\u22b1\u0f36\u0f04 *\/\r\nfunction setup_global_post_variables() {\r\n global $post;\r\n global \r\n $slug, \/\/\u30b9\u30e9\u30c3\u30b0\r\n $cat_id, $cat_link, $cat_slug, $cat_name, \/\/\u30ab\u30c6\u30b4\u30ea\u30fc\r\n $tag_id, $tag_link, $tag_name; \/\/\u30bf\u30b0\r\n \r\n \/\/ $post\u304c\u5b58\u5728\u3059\u308b\u304b\u78ba\u8a8d\r\n if (!isset($post) || !$post) {\r\n return;\r\n }\r\n \r\n \/\/ \u30b9\u30e9\u30c3\u30b0\u306e\u53d6\u5f97\r\n $slug = isset($post->post_name) ? $post->post_name : '';\r\n \r\n \/\/ \u30ab\u30c6\u30b4\u30ea\u30fc\u306e\u53d6\u5f97\r\n if (has_category()) {\r\n $categories = get_the_category();\r\n if (!empty($categories)) {\r\n $category = $categories[0];\r\n $cat_id = $category->cat_ID;\r\n $cat_link = get_category_link($cat_id);\r\n $cat_slug = $category->category_nicename;\r\n $cat_name = $category->cat_name;\r\n }\r\n }\r\n \r\n \/\/ \u30bf\u30b0\u306e\u53d6\u5f97\r\n if (has_tag()) {\r\n $posttags = get_the_tags();\r\n if (!empty($posttags)) {\r\n $tag_name = $posttags[0]->name;\r\n $tag_id = $posttags[0]->term_id;\r\n $tag_link = get_tag_link($tag_id);\r\n }\r\n }\r\n}\r\nadd_action('template_redirect', 'setup_global_post_variables');\r\n?>\r\n<\/code><\/pre>\r\n\r\n\u5404\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u306e\u4f7f\u7528\u65b9\u6cd5<\/h3>\r\n
\u4e0a\u8a18\u306e\u8a2d\u5b9a\u5f8c\u3001\u5404\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u6f54\u306b\u66f8\u3051\u307e\u3059\uff1a<\/p>\r\n
<?php\r\n\/\/\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\r\nglobal \r\n $slug, \/\/\u30b9\u30e9\u30c3\u30b0\r\n $cat_id, $cat_link, $cat_slug, $cat_name, \/\/\u30ab\u30c6\u30b4\u30ea\u30fc\r\n $tag_id, $tag_link, $tag_name; \/\/\u30bf\u30b0\r\n?>\r\n\r\n<!-- \u3053\u308c\u3060\u3051\u3067OK\uff01 -->\r\n<h1><?php echo $cat_name; ?><\/h1>\r\n<\/code><\/pre>\r\n
\r\n\r\n\r\n6. \u4e00\u62ec\u4fee\u6b63\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2>\r\n\r\n\u30b9\u30c6\u30c3\u30d71: \u30a8\u30e9\u30fc\u30ed\u30b0\u3092\u78ba\u8a8d<\/h3>\r\n# \u30a8\u30e9\u30fc\u30ed\u30b0\u306e\u5834\u6240\u3092\u78ba\u8a8d\r\ntail -f \/path\/to\/error_log\r\n<\/code><\/pre>\r\n\r\n\u30b9\u30c6\u30c3\u30d72: \u691c\u7d22\u30d1\u30bf\u30fc\u30f3\u3067\u554f\u984c\u7b87\u6240\u3092\u7279\u5b9a<\/h3>\r\n
\u4ee5\u4e0b\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u30c6\u30fc\u30de\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5168\u4f53\u3067\u691c\u7d22\uff1a<\/p>\r\n
\r\n $post->post_name<\/code><\/li>\r\n $post->ID<\/code><\/li>\r\n get_post_meta($post<\/code><\/li>\r\n get_post_ancestors($post<\/code><\/li>\r\n get_the_category()[0]<\/code><\/li>\r\n get_the_tags()[0]<\/code><\/li>\r\n<\/ul>\r\n\r\n\u30b9\u30c6\u30c3\u30d73: \u30d5\u30a1\u30a4\u30eb\u3054\u3068\u306b\u4fee\u6b63<\/h3>\r\n
![\"\u3010WordPress\u3011body\u306eid\u306b\u30b9\u30e9\u30c3\u30b0\u540d\u3001body_class\u306b\u4efb\u610f\u306e\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5\"](\"https:\/\/code-plus.jp\/gp\/wp-content\/uploads\/da9500431216c82ae6549db7e1d5ecb1.jpg\")
\r\n<\/picture>\r\n