{"id":23003,"date":"2023-08-13T15:04:13","date_gmt":"2023-08-13T06:04:13","guid":{"rendered":"https:\/\/motoki-design.co.jp\/wordpress\/?p=23003"},"modified":"2026-10-04T19:57:10","modified_gmt":"2026-10-04T10:57:10","slug":"wordpress-add-custom-code","status":"publish","type":"post","link":"https:\/\/motoki-design.co.jp\/wordpress\/wordpress-add-custom-code\/","title":{"rendered":"WordPress\u2502\u7de8\u96c6\u8a18\u4e8b\u4e0b\u306bCSS\u3068JS\u306e\u5165\u529b\u6b04\u3092\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

\u6295\u7a3f\u30fb\u56fa\u5b9a\u30da\u30fc\u30b8\u3054\u3068\u306bCSS\u3068JavaScript\u3092\u4fdd\u5b58\u3057\u3001\u305d\u306e\u30da\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b\u3068\u304d\u3060\u3051\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002<\/p>\n\n

\u5165\u529b\u3067\u304d\u308b\u306e\u306fmanage_options\u30fbunfiltered_html\u30fb\u5bfe\u8c61\u8a18\u4e8b\u306e\u7de8\u96c6\u6a29\u9650\u3092\u6301\u3064\u5229\u7528\u8005\u3060\u3051\u3067\u3059\u3002<\/p>\n\n

\u4e00\u822c\u306e\u6295\u7a3f\u8005\u3078JavaScript\u5165\u529b\u3092\u958b\u653e\u3059\u308b\u7528\u9014\u306b\u306f\u4f7f\u3044\u307e\u305b\u3093\u3002<\/p>\n

\u5c0e\u5165\u524d\u306e\u78ba\u8a8d<\/h2>\n

\u5b50\u30c6\u30fc\u30de\u306efunctions.php\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3001\u65e2\u5b58\u306ePHP\u9818\u57df\u3078\u4e0b\u8a18\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n

\u5148\u982d\u306e<?php\u306f\u65e2\u306b\u3042\u308b\u5834\u5408\u306f\u91cd\u306d\u307e\u305b\u3093\u3002<\/p>\n\n

\u30c6\u30fc\u30de\u306b\u540c\u7b49\u306e\u6a5f\u80fd\u304c\u3042\u308b\u5834\u5408\u306f\u305d\u3061\u3089\u306b\u7d71\u4e00\u3057\u3001\u4e8c\u91cd\u51fa\u529b\u3092\u907f\u3051\u307e\u3059\u3002<\/p>\n\n

\u65e7\u7248\u306eadd_custom_code_meta_box\u3001save_custom_code_meta_box_data\u3001output_custom_css\u3001output_custom_js\u3068\u5bfe\u5fdc\u3059\u308b\u30d5\u30c3\u30af\u306f\u64a4\u53bb\u3057\u3066\u304b\u3089\u7f6e\u304d\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u65e7custom_css\/custom_js\u306f\u81ea\u52d5\u79fb\u884c\u3057\u307e\u305b\u3093\u3002<\/p>\n\n

\u65e7\u5165\u529b\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u65b0\u3057\u3044\u6b04\u306b\u30b3\u30d4\u30fc\u3057\u307e\u3059\u3002<\/p>\n\n

\u30b3\u30fc\u30c9\u306f\u5165\u529b\u8005\u3092\u4fe1\u983c\u3057\u3066\u5b9f\u884c\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3001JS\u306e\u5b89\u5168\u6027\u3092\u81ea\u52d5\u5224\u5b9a\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n

\u30de\u30eb\u30c1\u30b5\u30a4\u30c8\u306a\u3069\u3067unfiltered_html\u304c\u306a\u3044\u5229\u7528\u8005\u306b\u306f\u6b04\u3092\u8868\u793a\u3057\u307e\u305b\u3093\u3002<\/p>\n

\u5165\u529b\u6b04\u30fb\u4fdd\u5b58\u30fb\u516c\u958b\u5074\u306e\u8aad\u307f\u8fbc\u307f<\/h2>\n
<?php\nfunction waza_code_allowed($id) {\n    return current_user_can('manage_options') && current_user_can('unfiltered_html') && current_user_can('edit_post', $id);\n}\nfunction waza_code_valid($value) {\n    return is_string($value) && !preg_match('~<\/(?:script|style)~i', $value);\n}\nadd_action('add_meta_boxes', function ($type, $post) {\n    if (!in_array($type, ['post', 'page'], true) || !waza_code_allowed($post->ID)) return;\n    add_meta_box('waza-page-code', '\u8a18\u4e8b\u5c02\u7528 CSS \/ JS', function ($post) {\n        wp_nonce_field('waza-code-' . $post->ID, 'waza_code_nonce');\n        foreach (['css', 'js'] as $kind) {\n            $value = get_post_meta($post->ID, '_waza_code_' . $kind, true);\n            echo '<p><label for="waza-code-' . esc_attr($kind) . '">' . esc_html(strtoupper($kind)) . '<\/label><\/p>';\n            echo '<textarea id="waza-code-' . esc_attr($kind) . '" name="waza_code_' . esc_attr($kind) . '" rows="8" style="width:100%">' . esc_textarea(is_string($value) ? $value : '') . '<\/textarea>';\n        }\n        echo '<p>\u30bf\u30b0\u3092\u4ed8\u3051\u305a\u306b\u30b3\u30fc\u30c9\u3060\u3051\u3092\u5165\u529b\u3057\u307e\u3059\u3002script\/style \u306e\u7d42\u4e86\u30bf\u30b0\u3092\u542b\u3080\u5165\u529b\u306f\u4fdd\u5b58\u3055\u308c\u307e\u305b\u3093\u3002<\/p>';\n    }, $type, 'normal', 'default');\n}, 10, 2);\nfunction waza_code_save($id) {\n    if ((defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) || wp_is_post_revision($id) || wp_is_post_autosave($id)) return;\n    if (!in_array(get_post_type($id), ['post', 'page'], true) || !waza_code_allowed($id)) return;\n    if (!isset($_POST['waza_code_nonce']) || !is_string($_POST['waza_code_nonce']) || !wp_verify_nonce(wp_unslash($_POST['waza_code_nonce']), 'waza-code-' . $id)) return;\n    $values = [];\n    foreach (['css', 'js'] as $kind) {\n        $key = 'waza_code_' . $kind;\n        if (!isset($_POST[$key]) || !is_string($_POST[$key])) return;\n        $values[$kind] = wp_unslash($_POST[$key]);\n        if (!waza_code_valid($values[$kind])) return;\n    }\n    foreach ($values as $kind => $value) {\n        \/\/ update_post_meta() \u304c\u5916\u3059\u30b9\u30e9\u30c3\u30b7\u30e5\u3092\u88dc\u3044\u3001JS\u306e\u30d0\u30c3\u30af\u30b9\u30e9\u30c3\u30b7\u30e5\u3092\u4fdd\u3064\u3002\n        update_post_meta($id, '_waza_code_' . $kind, wp_slash($value));\n    }\n}\nadd_action('save_post', 'waza_code_save');\nfunction waza_code_enqueue() {\n    if (!is_singular(['post', 'page'])) return;\n    $id = get_queried_object_id();\n    $css = get_post_meta($id, '_waza_code_css', true);\n    $js = get_post_meta($id, '_waza_code_js', true);\n    if (waza_code_valid($css) && $css !== '') {\n        wp_register_style('waza-page-code', false);\n        wp_enqueue_style('waza-page-code');\n        wp_add_inline_style('waza-page-code', $css);\n    }\n    if (waza_code_valid($js) && $js !== '') {\n        wp_register_script('waza-page-code', false, [], null, true);\n        wp_enqueue_script('waza-page-code');\n        wp_add_inline_script('waza-page-code', $js);\n    }\n}\nadd_action('wp_enqueue_scripts', 'waza_code_enqueue');\n<\/code><\/pre><\/div>\n
CSS\u30fbJS\u306f\u30bf\u30b0\u3092\u4ed8\u3051\u305a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n\n
\u7d42\u4e86\u30bf\u30b0\u3092\u542b\u3080\u5165\u529b\u3001\u7247\u65b9\u306e\u6b04\u304c\u6b20\u3051\u305f\u9001\u4fe1\u3001nonce\u4e0d\u4e00\u81f4\u306a\u3069\u306f\u4e21\u65b9\u3068\u3082\u4fdd\u5b58\u305b\u305a\u4ee5\u524d\u306e\u5024\u3092\u7dad\u6301\u3057\u307e\u3059\u3002<\/p>\n\n
\u4fdd\u5b58\u5f8c\u306b\u7de8\u96c6\u753b\u9762\u3092\u518d\u8aad\u307f\u8fbc\u307f\u3057\u3066\u5024\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n
nonce\u3060\u3051\u3067\u6a29\u9650\u3092\u5224\u65ad\u305b\u305a\u3001\u4fdd\u5b58\u6642\u306b\u3082\u6a29\u9650\u3068\u6295\u7a3f\u7a2e\u5225\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n
\u7d42\u4e86\u30bf\u30b0\u306e\u691c\u67fb\u306f\u3001CSS\u3084JavaScript\u306e\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u69cb\u6587\u304c\u8aa4\u3063\u3066\u3044\u3066\u3082\u3053\u306e\u691c\u67fb\u3092\u901a\u308b\u5834\u5408\u304c\u3042\u308b\u305f\u3081\u3001\u6b04\u306b\u5024\u304c\u4fdd\u5b58\u3055\u308c\u305f\u3053\u3068\u3068\u516c\u958b\u30da\u30fc\u30b8\u3067\u6b63\u5e38\u306b\u52d5\u3044\u305f\u3053\u3068\u306f\u5206\u3051\u3066\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n
\u4fdd\u5b58\u5f8c\u3082\u52d5\u304b\u306a\u3044\u5834\u5408\u306f\u5165\u529b\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3001JavaScript\u3067\u306f\u30d6\u30e9\u30a6\u30b6\u30fc\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3044\u306a\u3044\u304b\u3092\u8abf\u3079\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30d0\u30c3\u30af\u30b9\u30e9\u30c3\u30b7\u30e5\u3092\u542b\u3080\u30b3\u30fc\u30c9\u306fwp_unslash\u3067\u30d5\u30a9\u30fc\u30e0\u306e\u30b9\u30e9\u30c3\u30b7\u30e5\u3092\u5916\u3057\u3001update_post_meta\u306e\u4ed5\u69d8<\/a>\u306b\u5408\u308f\u305b\u3066wp_slash\u3092\u4ed8\u3051\u3066\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n\n
\u516c\u958b\u5074\u3067\u306f\u5bfe\u8c61\u8a18\u4e8bID\u3092\u4f7f\u3044\u3001JS\u306fwp_add_inline_script<\/a>\u3067\u30d5\u30c3\u30bf\u30fc\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n
\u30c6\u30fc\u30de\u306ewp_head\u30fbwp_footer\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n
\u52d5\u4f5c\u78ba\u8a8d\u7528\u306e\u30dc\u30bf\u30f3<\/h2>\n
\u8a18\u4e8b\u306e\u30ab\u30b9\u30bf\u30e0HTML\u30d6\u30ed\u30c3\u30af\u3078\u6b21\u3092\u5165\u308c\u3001CSS\u30fbJS\u306f\u65b0\u3057\u3044\u5165\u529b\u6b04\u3078\u5225\u3005\u306b\u8cbc\u308a\u4ed8\u3051\u307e\u3059\u3002<\/p>\n\n
CSS\u306f\u3053\u306e\u30af\u30e9\u30b9\u3092\u6301\u3064\u8981\u7d20\u3060\u3051\u306b\u9069\u7528\u3057\u307e\u3059\u3002<\/p>\n\n
\u30da\u30fc\u30b8\u5358\u4f4d\u306e\u8aad\u307f\u8fbc\u307f\u3067\u3082body\u306a\u3069\u3092\u6307\u5b9a\u3059\u308c\u3070\u30da\u30fc\u30b8\u5168\u4f53\u3078\u4f5c\u7528\u3059\u308b\u70b9\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
<button type="button" class="waza-code-test">\u52d5\u4f5c\u3092\u78ba\u8a8d<\/button><\/code><\/pre><\/div>\n
.waza-code-test { border: 3px solid #a21d32; padding: .7em 1em; }<\/code><\/pre><\/div>\n
document.querySelectorAll('.waza-code-test').forEach(function (button) {\n  button.addEventListener('click', function () {\n    button.textContent = 'JavaScript\u304c\u52d5\u4f5c\u3057\u307e\u3057\u305f';\n  });\n});<\/code><\/pre><\/div>\n
\u30dc\u30bf\u30f3\u90e8\u5206\u306e\u52d5\u304f\u898b\u672c<\/h2>\n
\u6b21\u306e\u30dc\u30bf\u30f3\u306f\u4e0a\u306eCSS\u30fbJS\u3068\u540c\u3058\u52d5\u4f5c\u3092\u8a18\u4e8b\u5185\u3067\u8868\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n
\u7ba1\u7406\u753b\u9762\u306e\u30e1\u30bf\u30dc\u30c3\u30af\u30b9\u4fdd\u5b58\u3092\u691c\u8a3c\u3059\u308b\u898b\u672c\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n