{"id":82702,"date":"2024-03-21T01:49:52","date_gmt":"2024-03-20T16:49:52","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/php-%e3%81%a7-mysql-%e3%81%ae%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e3%82%92%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/"},"modified":"2025-08-12T22:33:10","modified_gmt":"2025-08-12T13:33:10","slug":"php-%e3%81%a7-mysql-%e3%81%ae%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e3%82%92%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/php-%e3%81%a7-mysql-%e3%81%ae%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e3%82%92%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/","title":{"rendered":"PHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002"},"content":{"rendered":"

PHP\u306b\u304a\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067MySQL\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\uff1a<\/p>\n

    \n
  1. \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u306b\u306f\u3001MySQL\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067MySQL\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059\u3002<\/li>\n
  2. mysql -u root -p<\/li>\n
  3. \u73fe\u5728\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u306a\u3044\u5834\u5408\u306f\u3001Enter\u30ad\u30fc\u3092\u62bc\u3057\u307e\u3059\uff09\u3002\u6b21\u306b\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n
  4. ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘new_password’;<\/li>\n
  5. ”root”@”localhost”\u3092\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u305f\u3044MySQL\u306e\u30e6\u30fc\u30b6\u30fc\u540d\u3068\u30db\u30b9\u30c8\u540d\u306b\u3001”new_password”\u3092\u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u5909\u66f4\u3057\u3066\u5b9f\u884c\u3057\u305f\u5f8c\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067MySQL\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d42\u4e86\u3057\u307e\u3059\uff1a<\/li>\n
  6. \u3084\u3081\u308b\u3002<\/li>\n
  7. PHP\u306eMySQL\u95a2\u6570\u3092\u7528\u3044\u3066\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002PHP\u3067\u306f\u3001mysqli\u62e1\u5f35\u6a5f\u80fd\u307e\u305f\u306fPDO\u62e1\u5f35\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u3066MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/li>\n
  8. MySQLi \u62e1\u5f35\u3092\u4f7f\u7528\u3059\u308b:<\/li>\n
  9. \u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8\u306eMySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3059\u308b$conn = mysqli_connect(‘localhost’, ‘root’, ‘\u73fe\u5728\u306e\u30d1\u30b9\u30ef\u30fc\u30c9’);\n

    \/\/ \u63a5\u7d9a\u304c\u6210\u529f\u3057\u305f\u304b\u3069\u3046\u304b\u78ba\u8a8d\u3059\u308b
    \nif (!$conn) {
    \ndie(“\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f: ” . mysqli_connect_error());
    \n}<\/p>\n

    \/\/ \u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b
    \n$newPassword = ‘\u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9’;
    \n$sql = “ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘$newPassword'”;<\/p>\n

    if (mysqli_query($conn, $sql)) {
    \necho “\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u66f4\u65b0\u3055\u308c\u307e\u3057\u305f”;
    \n} else {
    \necho “\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u66f4\u65b0\u306b\u5931\u6557\u3057\u307e\u3057\u305f: ” . mysqli_error($conn);
    \n}<\/li>\n

  10. PDO\u62e1\u5f35\u3092\u4f7f\u7528\u3059\u308b\uff1a<\/li>\n
  11. MySQL\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u63a5\u7d9a\u3057\u307e\u3059
    \ntry {
    \n$conn = new PDO(‘mysql:host=localhost;dbname=my_db’, ‘root’, ‘current_password’);
    \n} catch (PDOException $e) {
    \ndie(“\u63a5\u7d9a\u306b\u5931\u6557\u3057\u307e\u3057\u305f: ” . $e->getMessage());
    \n}\/\/ \u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a
    \n$newPassword = ‘new_password’;
    \n$sql = “ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘$newPassword'”;<\/p>\n

    if ($conn->exec($sql) !== false) {
    \necho ‘\u6b63\u5e38\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5909\u66f4\u3057\u307e\u3057\u305f\u3002’;
    \n} else {
    \necho “\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5909\u66f4\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f: ” . $conn->errorInfo()[2];
    \n}<\/p>\n

    \/\/ \u63a5\u7d9a\u3092\u9589\u3058\u308b
    \n$conn = null;<\/li>\n

  12. `localhost` \u3092 MySQL \u30db\u30b9\u30c8\u540d\u306b\u3001`root` \u3092\u30e6\u30fc\u30b6\u30fc\u540d\u306b\u3001`current_password` \u3092\u73fe\u5728\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u3001`new_password` \u3092\u65b0\u3057\u3044\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u5909\u66f4\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    PHP\u306b\u304a\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u65b9\u6cd5\u3067MySQL\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\uff1a \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u306b\u306f\u3001MySQL\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3067MySQL\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14,18],"class_list":["post-82702","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-14","tag-18"],"yoast_head":"\nPHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"PHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/php-\u3067-mysql-\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta property=\"og:description\" content=\"PHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/php-\u3067-mysql-\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-20T16:49:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T13:33:10+00:00\" \/>\n<meta name=\"author\" content=\"\u7d50\u8863, \u6625\u82b1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u7d50\u8863, \u6625\u82b1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/php-%e3%81%a7-mysql-%e3%81%ae%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e3%82%92%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/php-%e3%81%a7-mysql-%e3%81%ae%e3%83%91%e3%82%b9%e3%83%af%e3%83%bc%e3%83%89%e3%82%92%e8%a8%ad%e5%ae%9a%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/\",\"name\":\"PHP \u3067 MySQL \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u8a2d\u5b9a\u3059\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002 - 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