{"id":10006138,"date":"2022-08-08T19:24:18","date_gmt":"2022-08-08T11:24:18","guid":{"rendered":"https:\/\/ityet.com\/?p=10006138"},"modified":"2022-08-08T19:24:18","modified_gmt":"2022-08-08T11:24:18","slug":"php%e6%89%8b%e5%86%99%e4%b8%80%e4%b8%aapdo%e6%95%b0%e6%8d%ae%e5%ba%93%e6%93%8d%e4%bd%9c%e7%b1%bb%ef%bc%88%e9%99%84%e5%a2%9e%e5%88%a0%e6%94%b9%e6%9f%a5%e5%ae%9e%e4%be%8b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006138","title":{"rendered":"php\u624b\u5199\u4e00\u4e2apdo\u6570\u636e\u5e93\u64cd\u4f5c\u7c7b\uff08\u9644\u589e\u5220\u6539\u67e5\u5b9e\u4f8b\uff09"},"content":{"rendered":"

\u6570\u636e\u5e93\u64cd\u4f5c\u7c7b\u7684\u4f18\u70b9<\/h2>\n

\u4f18\u70b9\u53ef\u4ee5\u8bf4\u662f\u975e\u5e38\u591a\u4e86\uff0c\u5e38\u89c1\u7684\u4f18\u70b9\u5c31\u662f\u4fbf\u4e8e\u7ef4\u62a4\u3001\u590d\u7528\u3001\u9ad8\u6548\u3001\u5b89\u5168\u3001\u6613\u6269\u5c55\u3002\u4f8b\u5982PDO\u652f\u6301\u7684\u6570\u636e\u5e93\u7c7b\u578b\u662f\u975e\u5e38\u591a\u7684\uff0c\u4e0emysqli\u4e0d\u540c\u7684\u5c31\u662f\uff0cPDO\u8fd8\u652f\u6301\u5176\u4ed6\u6570\u636e\u5e93\uff0c\u4e00\u5957\u5199\u6cd5\u591a\u79cd\u6570\u636e\u5e93\u7684\u5339\u914d\uff0c\u800cmysqli\u4ec5\u4ec5\u662f\u652f\u6301mysql\u3002<\/p>\n

\u4ee3\u7801<\/h2>\n

Db.php<\/p>\n

<?php\n\/**\n * \u6570\u636e\u5e93\u7684\u57fa\u672c\u64cd\u4f5c\n *\/\n\nclass Db\n{\n    \/\/ \u6570\u636e\u5e93\u7684\u9ed8\u8ba4\u8fde\u63a5\u53c2\u6570\n    private $dbConfig=[\n        'db'=>'mysql', \/\/ \u6570\u636e\u5e93\u7c7b\u578b\n        'host'=>'localhost', \/\/ \u4e3b\u673a\u540d\u79f0\n        'port'=>'3306', \/\/ \u9ed8\u8ba4\u7aef\u53e3\n        'user'=>'root', \/\/ \u7528\u6237\u540d\n        'pass'=>'root', \/\/ \u5bc6\u7801\n        'charset'=>'utf8', \/\/ \u9ed8\u8ba4\u5b57\u7b26\u96c6\n        'dbname'=>'edu', \/\/ \u9ed8\u8ba4\u6570\u636e\u5e93\n    ];\n\n    \/\/ \u65b0\u589e\u4e3b\u952eid\n    public $insertId = null;\n\n    \/\/ \u53d7\u5f71\u54cd\u7684\u8bb0\u5f55\n    public $num = 0;\n\n    \/\/ \u5355\u4f8b\u6a21\u5f0f\uff0c\u672c\u7c7b\u7684\u5b9e\u4f8b\n    private static $instance = null;\n\n    \/\/ \u6570\u636e\u5e93\u7684\u8fde\u63a5\n    private $conn = null;\n\n    \/**\n     * Db\u6784\u9020\u65b9\u6cd5\n     * \u79c1\u6709\u5316\u4ee5\u9632\u6b62\u5916\u90e8\u5b9e\u4f8b\u5316\n     *\/\n    private function __construct($params=[])\n    {\n        \/\/ \u521d\u59cb\u5316\u8fde\u63a5\u53c2\u6570\n        $this->dbConfig = array_merge($this->dbConfig,$params);\n        \/\/ \u8fde\u63a5\u6570\u636e\u5e93\n        $this->connect();\n    }\n\n    \/**\n     * \u7981\u6b62\u5916\u90e8\u514b\u9686\u8be5\u5b9e\u4f8b\n     *\/\n    private function __clone()\n    {\n        \/\/ TODO\uff1aImplement __clone() method.\n    }\n\n    \/**\n     * \u83b7\u53d6\u5f53\u524d\u7c7b\u7684\u5355\u4e00\u5b9e\u4f8b\n     *\/\n    public static function getInstance($params=[])\n    {\n        if (!self::$instance instanceof self) {\n            self::$instance = new self($params);\n        }\n        return self::$instance;\n    }\n\n    private function connect()\n    {\n        try{\n            \/\/ \u914d\u7f6e\u6570\u636e\u6e90DSN\n            $dsn = "{$this->dbConfig['db']}:host={$this->dbConfig['host']};port={$this->dbConfig['port']};dbname={$this->dbConfig['dbname']};charset={$this->dbConfig['charset']}";\n\n            \/\/ \u521b\u5efaPDO\u5bf9\u8c61\n            $this->conn = new PDO($dsn,$this->dbConfig['user'],$this->dbConfig['pass']);\n            \n            \/\/ \u8bbe\u7f6e\u5ba2\u6237\u7aef\u5b57\u7b26\u96c6\n            $this->conn->query("SET NAMES {$this->dbConfig['charset']}");\n\n        }catch (PDOException $e){\n            die('\u6570\u636e\u5e93\u8fde\u63a5\u5931\u8d25'.$e->getMessage());\n        }\n    }\n\n    \/** \n     * \u5b8c\u6210\u6570\u636e\u8868\u7684\u64cd\u4f5c\uff1aCURD\n     *\/\n    \n    public function exec($sql)\n    {\n        $num = $this->conn->exec($sql);\n        \/\/ \u5982\u679c\u6709\u53d7\u5f71\u54cd\u7684\u8bb0\u5f55\n        if($num > 0){\n            \/\/ \u5982\u679c\u662f\u65b0\u589e\u64cd\u4f5c\uff0c\u521d\u59cb\u5316\u65b0\u589e\u4e3b\u952eid\u5c5e\u6027\n            if(null !==$this->conn->lastInsertId()){\n                $this->insertId = $this->conn->lastInsertId();\n            }\n            $this->num = $num; \/\/ \u8fd4\u56de\u53d7\u5f71\u54cd\u7684\u8bb0\u5f55\n        }else{\n            $error = $this->conn->errorInfo(); \/\/ \u83b7\u53d6\u6700\u540e\u64cd\u4f5c\u9519\u8bef\u4fe1\u606f\u7684\u6570\u7ec4\n            var_dump($error);\n        }\n    }\n\n    \/\/ \u83b7\u53d6\u5355\u6761\u67e5\u8be2\u7ed3\u679c\n    public function fetch($sql)\n    {\n        return $this->conn->query($sql)->fetch(PDO::FETCH_ASSOC);\n    }\n\n    \/\/ \u83b7\u53d6\u591a\u6761\u67e5\u8be2\u7ed3\u679c\n    public function fetchAll($sql)\n    {\n        return $this->conn->query($sql)->fetchAll(PDO::FETCH_ASSOC);\n    }\n}\n?><\/code><\/pre>\n
\u8c03\u7528<\/h2>\n
Demo.php<\/p>\n
<?php\n\/**\n * Db\u7c7b\u6d4b\u8bd5\n *\/\n\nrequire 'Db.php';\n\n\/\/ \u83b7\u53d6Db\u7c7b\u5b9e\u4f8b\n$db = Db::getInstance();\n\n\/\/ \u65b0\u589e\u64cd\u4f5c\n\/\/ $sql = "INSERT student SET name='\u5f20\u4e00\u9e23',email='ByteDance@qq.com',grade='59',course='golang'";\n\/\/ $db->exec($sql);\n\/\/ echo '\u6210\u529f\u63d2\u5165\u4e86'.$db->num.'\u6761\u8bb0\u5f55\uff0c\u4e3b\u952eid\u662f'.$db->insertId;\n\n\/\/ \u5220\u9664\u64cd\u4f5c\n\/\/ $sql = "DELETE FROM student WHERE id='4'";\n\/\/ $db->exec($sql);\n\/\/ echo '\u6210\u529f\u5220\u9664\u4e86'.$db->num.'\u6761\u8bb0\u5f55';\n\n\/\/ \u66f4\u65b0\u64cd\u4f5c\n\/\/ $sql = "UPDATE student SET grade='1199' WHERE id='1'";\n\/\/ $db->exec($sql);\n\/\/ echo '\u6210\u529f\u66f4\u65b0\u4e86'.$db->num.'\u6761\u8bb0\u5f55';\n\n\/\/ \u67e5\u8be2\u5355\u6761\u64cd\u4f5c\n\/\/ $sql = "SELECT id,name,email,grade FROM student WHERE grade < '60'";\n\/\/ $row = $db->fetch($sql);\n\/\/ var_dump($row);\n\n\/\/ \/\/ \u67e5\u8be2\u591a\u6761\u64cd\u4f5c\n\/\/ $sql = "SELECT id,name,email,grade FROM student WHERE grade > '80'";\n\/\/ $rows = $db->fetchAll($sql);\n\/\/ var_dump($rows);\n?><\/code><\/pre>\n
\u6570\u636e\u5e93\u8868\u683c\u7ed3\u6784<\/h2>\n
\"image.png\"<\/p>\n
SQL<\/h2>\n
\u5168\u9009\u4e0b\u9762\u7684SQL\u8bed\u53e5\u7c98\u8d34\u81f3\u6570\u636e\u5e93\u7ba1\u7406\u5de5\u5177\u7684SQL\u6267\u884c\u6846\u8fdb\u884c\u6267\u884c\u5373\u53ef\u5feb\u901f\u521b\u5efa\u6d4b\u8bd5\u6570\u636e\u5e93\u3002<\/p>\n
-- phpMyAdmin SQL Dump\n-- version 4.8.5\n-- https:\/\/www.phpmyadmin.net\/\n--\n-- \u4e3b\u673a\uff1a localhost\n-- \u751f\u6210\u65e5\u671f\uff1a 2022-08-08 10:46:35\n-- \u670d\u52a1\u5668\u7248\u672c\uff1a 5.7.26\n-- PHP \u7248\u672c\uff1a 7.3.4\n\nSET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";\nSET AUTOCOMMIT = 0;\nSTART TRANSACTION;\nSET time_zone = "+00:00";\n\n\n\/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT *\/;\n\/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS *\/;\n\/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION *\/;\n\/*!40101 SET NAMES utf8mb4 *\/;\n\n--\n-- \u6570\u636e\u5e93\uff1a `edu`\n--\n\n-- --------------------------------------------------------\n\n--\n-- \u8868\u7684\u7ed3\u6784 `student`\n--\n\nCREATE TABLE `student` (\n  `id` int(11) NOT NULL,\n  `name` varchar(32) COLLATE utf8_unicode_ci NOT NULL,\n  `email` text COLLATE utf8_unicode_ci NOT NULL,\n  `grade` varchar(32) COLLATE utf8_unicode_ci NOT NULL,\n  `course` varchar(32) COLLATE utf8_unicode_ci NOT NULL\n) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;\n\n--\n-- \u8f6c\u5b58\u8868\u4e2d\u7684\u6570\u636e `student`\n--\n\nINSERT INTO `student` (`id`, `name`, `email`, `grade`, `course`) VALUES\n(1, '\u738b\u5174', 'meituan@qq.com', '80', 'ruby'),\n(2, '\u9ec4\u5ce5', 'pdd@qq.com', '68', 'mysql'),\n(6, '\u674e\u5f66\u5b8f', 'baidu@qq.com', '95', 'python'),\n(5, '\u9a6c\u4e91', 'mayun@qq.com', '88', 'php'),\n(7, '\u5218\u5f3a\u4e1c', 'jd@qq.com', '76', 'C++'),\n(8, '\u9a6c\u5316\u817e', '10001@qq.com', '59', 'java'),\n(9, '\u5f20\u4e00\u9e23', 'ByteDance@qq.com', '77', 'golang');\n\n--\n-- \u8f6c\u50a8\u8868\u7684\u7d22\u5f15\n--\n\n--\n-- \u8868\u7684\u7d22\u5f15 `student`\n--\nALTER TABLE `student`\n  ADD PRIMARY KEY (`id`);\n\n--\n-- \u5728\u5bfc\u51fa\u7684\u8868\u4f7f\u7528AUTO_INCREMENT\n--\n\n--\n-- \u4f7f\u7528\u8868AUTO_INCREMENT `student`\n--\nALTER TABLE `student`\n  MODIFY `id` int(11) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=10;\nCOMMIT;\n\n\/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT *\/;\n\/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS *\/;\n\/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION *\/;<\/code><\/pre>\n
\u4f5c\u8005<\/h2>\n
TANKING<\/p>\n
https:\/\/segmentfault.com\/a\/1190000042283240<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6570\u636e\u5e93\u64cd\u4f5c\u7c7b\u7684\u4f18\u70b9 \u4f18\u70b9\u53ef\u4ee5\u8bf4\u662f\u975e\u5e38\u591a\u4e86\uff0c\u5e38\u89c1\u7684\u4f18\u70b9\u5c31\u662f\u4fbf\u4e8e\u7ef4\u62a4\u3001\u590d\u7528\u3001\u9ad8\u6548\u3001\u5b89\u5168\u3001\u6613\u6269\u5c55\u3002\u4f8b\u5982PDO\u652f\u6301\u7684\u6570 […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006138","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006138"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006138\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006138"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}