{"id":12396334,"date":"2026-05-06T08:49:32","date_gmt":"2026-05-06T00:49:32","guid":{"rendered":"https:\/\/www.likacloud.com\/knowledge\/wordpress%e6%8f%92%e4%bb%b6%e5%bc%80%e5%8f%91%e5%ae%8c%e5%85%a8%e6%8c%87%e5%8d%97%ef%bc%9a%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e7%b2%be%e9%80%9a%e6%89%93%e9%80%a0%e4%b8%93%e4%b8%9a%e6%89%a9%e5%b1%95\/"},"modified":"2026-06-03T23:26:23","modified_gmt":"2026-06-03T15:26:23","slug":"wordpress-plugin-development-beginner-to-expert-guide","status":"publish","type":"knowledge_post","link":"https:\/\/www.likacloud.com\/ja\/knowledge\/wordpress\/wordpress-plugin-development-beginner-to-expert-guide\/","title":{"rendered":"WordPress\u30d7\u30e9\u30b0\u30a4\u30f3\u958b\u767a\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u5165\u9580\u304b\u3089\u4e0a\u7d1a\u307e\u3067\u3001\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306a\u62e1\u5f35\u6a5f\u80fd\u306e\u4f5c\u6210\u65b9\u6cd5"},"content":{"rendered":"

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\r\n \r\n
\r\n \r\n UltaHost\u306eWordPress\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9 <\/strong>\r\n
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\r\n \r\n \"UltaHost\r\n \r\n <\/a>\r\n \r\n \r\n \u30a2\u30af\u30bb\u30b9\u30da\u30fc\u30b8 <\/a>\r\n <\/div>\r\n<\/div>\n\n\n\n\n\n\n
<?php\n\/**\n * Plugin Name:       \u6211\u7684\u9996\u4e2a\u63d2\u4ef6\n * Plugin URI:        https:\/\/example.com\/my-first-plugin\n * Description:       \u8fd9\u662f\u4e00\u4e2a\u7528\u4e8e\u5b66\u4e60\u7684\u7b80\u5355WordPress\u63d2\u4ef6\u3002\n * Version:           1.0.0\n * Author:            \u4f60\u7684\u540d\u5b57\n * License:           GPL v2 or later\n * Text Domain:       my-first-plugin\n *\/<\/code><\/pre>\n\n\n\n
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WordPress\u306e\u30b3\u30a2\u958b\u767a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u3064\u3044\u3066\u6df1\u304f\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n
WordPress\u306e\u5f37\u529b\u306a\u70b9\u306f\u3001\u9ad8\u5ea6\u306b\u62e1\u5f35\u53ef\u80fd\u306a\u30d5\u30c3\u30af\u30b7\u30b9\u30c6\u30e0\u306b\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30d5\u30c3\u30af\u30b7\u30b9\u30c6\u30e0\u306b\u306f\u300c\u30a2\u30af\u30b7\u30e7\u30f3\uff08Action\uff09\u300d\u3068\u300c\u30d5\u30a3\u30eb\u30bf\u30fc\uff08Filter\uff09\u300d\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u304c\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u304cWordPress\u306e\u30b3\u30a2\u3084\u4ed6\u306e\u30d7\u30e9\u30b0\u30a4\u30f3\u3068\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u305f\u3081\u306e\u57fa\u76e4\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
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\u30a2\u30af\u30b7\u30e7\u30f3\u30d5\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7279\u5b9a\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u30ab\u30b9\u30bf\u30e0\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001wp_head<\/code>\u30a2\u30af\u30b7\u30e7\u30f3\u306f\u30da\u30fc\u30b8\u4e0a\u306b\u3042\u308b\u3002<head><\/code>\u4e00\u90e8\u306e\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308b\u304b\u3001\u307e\u305f\u306f\u4f7f\u7528\u3059\u308b\u3002admin_init<\/code>\u30a2\u30af\u30b7\u30e7\u30f3\u306f\u3001\u7ba1\u7406\u8005\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u521d\u671f\u5316\u3055\u308c\u308b\u969b\u306b\u8a2d\u5b9a\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\u306b\u306f\u2026add_action()<\/code>\u95a2\u6570\u3002<\/p>\n\n\n\n
\u30d5\u30a3\u30eb\u30bf\u30fc\u30cf\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d7\u30ed\u30bb\u30b9\u5185\u3067\u4f1d\u9001\u3055\u308c\u308b\u30c7\u30fc\u30bf\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001the_content<\/code>\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u8a18\u4e8b\u306e\u5185\u5bb9\u304c\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3055\u308c\u308b\u524d\u306b\u305d\u308c\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d5\u30a3\u30eb\u30bf\u30fc\u3092\u8ffd\u52a0\u3059\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1aadd_filter()<\/code>\u95a2\u6570\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30d5\u30c3\u30af\u3092\u7406\u89e3\u3057\u3001\u719f\u77e5\u3057\u3066\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u306f\u3001\u9ad8\u5ea6\u306a\u30d7\u30e9\u30b0\u30a4\u30f3\u958b\u767a\u306e\u9375\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
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\r\n     \r\n  
\r\n    \r\n      hosting.com \u5171\u6709\u30db\u30b9\u30c6\u30a3\u30f3\u30b0    <\/strong>\r\n    
AMD EPYC CPU\u3001NVMe SSD\u30b9\u30c8\u30ec\u30fc\u30b8\u3001LiteSpeed\u306b\u3088\u308b\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u300124\u6642\u9593365\u65e5\u306e\u5c02\u9580\u5bb6\u306b\u3088\u308b\u793e\u5185\u30b5\u30dd\u30fc\u30c8\u3001SSL\u3001\u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u3001DDoS\u4fdd\u8b77\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3001\u6700\u592773%\u306e\u30b3\u30b9\u30c8\u524a\u6e1b<\/div>\r\n  <\/div>\r\n\r\n  
\r\n          \r\n                  \"\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30fb\u30c9\u30c3\u30c8\u30b3\u30e0\u306e\u30ed\u30b4\"\r\n          \r\n              <\/a>\r\n    \r\n    \r\n       \u30a2\u30af\u30bb\u30b9\u30da\u30fc\u30b8    <\/a>\r\n  <\/div>\r\n<\/div>\n\n\n\n\n\n\n
\u767b\u9332\u30e1\u30cb\u30e5\u30fc\u3092\u5b8c\u4e86\u3057\u305f\u5f8c\u3001\u8a2d\u5b9a\u30da\u30fc\u30b8\u306eHTML\u30d5\u30a9\u30fc\u30e0\u3092\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3059\u308b\u305f\u3081\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30d5\u30a9\u30fc\u30e0\u30c7\u30fc\u30bf\u3092\u5b89\u5168\u306b\u4fdd\u5b58\u3057\u51e6\u7406\u3059\u308b\u305f\u3081\u306b\u3001WordPress\u306f\u8a2d\u5b9aAPI\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002register_setting()<\/code>\u3001add_settings_section()<\/code>\u3068add_settings_field()<\/code>\u306a\u3069\u306e\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306eAPI\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u691c\u8a3c\uff08Nonce\u306e\u30c1\u30a7\u30c3\u30af\uff09\u3084\u6a29\u9650\u691c\u8a3c\u3092\u81ea\u52d5\u7684\u306b\u51e6\u7406\u3057\u3066\u304f\u308c\u308b\u305f\u3081\u3001\u624b\u52d5\u3067\u51e6\u7406\u3059\u308b\u3088\u308a\u3082\u4fbf\u5229\u3067\u3059\u3002`[$_POST]`\u306e\u30c7\u30fc\u30bf\u306e\u65b9\u304c\u306f\u308b\u304b\u306b\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n\n
\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u6838\u5fc3\u6a5f\u80fd\u306e\u5b9f\u88c5\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/h2>\n\n\n\n
\u5177\u4f53\u7684\u6a5f\u80fd\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u306e\u5b89\u5168\u306a\u3084\u308a\u53d6\u308a\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u7d76\u5bfe\u306bSQL\u30af\u30a8\u30ea\u6587\u5b57\u5217\u3092\u76f4\u63a5\u66f8\u3044\u3066\u5b9f\u884c\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u305d\u3046\u3059\u308b\u3068SQL\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u653b\u6483\u306e\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002\u4ee3\u308f\u308a\u306b\u3001WordPress\u304c\u63d0\u4f9b\u3059\u308b\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08Data Access Objects\uff09\u3092\u4f7f\u7528\u3059\u308b\u3079\u304d\u3067\u3059\u3002$wpdb<\/code>\u304a\u3088\u3073\u305d\u306e`prepare`\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d1\u30e9\u30e1\u30fc\u30bf\u5316\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u6c38\u7d9a\u7684\u306b\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30c7\u30fc\u30bf\u306b\u3064\u3044\u3066\u306f\u3001\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u7528\u3059\u308b\u4ee5\u5916\u306b\u3082\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\uff1adbDelta()<\/code>\u95a2\u6570\u306e\u4f5c\u6210\u65b9\u6cd5\u3068\u3057\u3066\u306f\u3001WordPress\u306e\u30aa\u30d7\u30b7\u30e7\u30f3API\u3092\u5229\u7528\u3059\u308b\u65b9\u304c\u3088\u308a\u4e00\u822c\u7684\u3067\u7c21\u5358\u3067\u3059\u3002add_option()<\/code>, get_option()<\/code>, update_option()<\/code>\u30ad\u30fc\u5024\u30da\u30a2\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u3001\u307e\u305f\u306f\u8a18\u4e8b\u3084\u30e6\u30fc\u30b6\u30fc\u306a\u3069\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306b\u3001\u8a18\u4e8b\u30e1\u30bf\u30c7\u30fc\u30bf\uff08Post Meta\uff09API\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306eAPI\u306f\u3001\u305d\u306e\u4e0b\u5c64\u3067\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u304c\u65bd\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u63a8\u85a6\u56f3\u66f8 \u30bc\u30ed\u304b\u3089WordPress\u30d7\u30e9\u30b0\u30a4\u30f3\u958b\u767a\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046\uff1a\u30aa\u30ea\u30b8\u30ca\u30eb\u6a5f\u80fd\u306e\u4f5c\u6210\u3068\u52b9\u7387\u7684\u306a\u53ce\u76ca\u5316<\/a>\u3002<\/p>\n\n\n\n\n
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\u5229\u7528\u3059\u308b__()<\/code>\u3053\u306e\u95a2\u6570\u306f\u6587\u5b57\u5217\u3092\u7ffb\u8a33\u3057\u3001\u305d\u306e\u7d50\u679c\u3092\u8fd4\u3057\u307e\u3059\u3002_e()<\/code>\u95a2\u6570\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u3092\u7ffb\u8a33\u3057\u3001\u305d\u306e\u7d50\u679c\u3092\u76f4\u63a5\u51fa\u529b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30d7\u30e9\u30b0\u30a4\u30f3\u306e\u30e1\u30a4\u30f3\u30d5\u30a1\u30a4\u30eb\u306e\u5192\u982d\u306b\u305d\u306e\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Text Domain<\/code>\u305d\u3057\u3066\u3001\u30c6\u30ad\u30b9\u30c8\u3092\u8aad\u307f\u8fbc\u3080\u969b\u306b\u3082\u305d\u308c\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002load_plugin_textdomain()<\/code>\u95a2\u6570\u3067\u3059\u3002\u305d\u306e\u5f8c\u3001Poedit\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.pot<\/code>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u7ffb\u8a33\u8005\u306f\u305d\u308c\u306b\u57fa\u3065\u3044\u3066\u7570\u306a\u308b\u8a00\u8a9e\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.po<\/code>\u3068.mo<\/code>\u30d5\u30a1\u30a4\u30eb\u3002<\/p>\n\n\r\n
\r\n     \r\n  
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