{"id":3087,"date":"2025-03-22T00:02:48","date_gmt":"2025-03-21T16:02:48","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3087"},"modified":"2025-03-22T00:02:48","modified_gmt":"2025-03-21T16:02:48","slug":"php-%e8%bf%9e%e6%8e%a5-mysql-%e7%9a%84%e6%96%b9%e5%bc%8f%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/22\/php-%e8%bf%9e%e6%8e%a5-mysql-%e7%9a%84%e6%96%b9%e5%bc%8f%e8%af%a6%e8%a7%a3\/","title":{"rendered":"PHP \u8fde\u63a5 MySQL \u7684\u65b9\u5f0f\u8be6\u89e3"},"content":{"rendered":"\n<p>\u5728 PHP \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e09\u79cd\u4e3b\u8981\u65b9\u5f0f\u8fde\u63a5 MySQL \u6570\u636e\u5e93\uff1a<\/p>\n\n\n\n<p><strong>MySQLi\uff08MySQL Improved\uff09<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9002\u7528\u4e8e MySQL \u6570\u636e\u5e93\u3002<\/li>\n\n\n\n<li>\u652f\u6301<strong>\u9762\u5411\u8fc7\u7a0b<\/strong>\u548c<strong>\u9762\u5411\u5bf9\u8c61<\/strong>\u4e24\u79cd\u98ce\u683c\u3002<\/li>\n\n\n\n<li>\u63d0\u4f9b\u9884\u5904\u7406\u8bed\u53e5\uff0c\u63d0\u9ad8\u5b89\u5168\u6027\uff0c\u9632\u6b62 SQL \u6ce8\u5165\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>PDO\uff08PHP Data Objects\uff09<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9002\u7528\u4e8e\u591a\u79cd\u6570\u636e\u5e93\uff08MySQL\u3001PostgreSQL\u3001SQLite \u7b49\uff09\u3002<\/li>\n\n\n\n<li>\u4ec5\u652f\u6301<strong>\u9762\u5411\u5bf9\u8c61<\/strong>\u98ce\u683c\u3002<\/li>\n\n\n\n<li>\u9884\u5904\u7406\u8bed\u53e5\u529f\u80fd\u66f4\u5f3a\uff0c\u63a8\u8350\u4f7f\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>MySQL \u6269\u5c55\uff08\u5df2\u5e9f\u5f03\uff09<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>mysql_connect()<\/code> \u5728 PHP 5.5 \u7248\u672c\u5f00\u59cb\u5e9f\u5f03\uff0cPHP 7 \u53ca\u4ee5\u4e0a\u7248\u672c\u4e0d\u518d\u652f\u6301\u3002<\/li>\n\n\n\n<li>\u4e0d\u5efa\u8bae\u4f7f\u7528\uff01<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u4f7f\u7528 MySQLi \u8fde\u63a5 MySQL<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1.1 \u8fc7\u7a0b\u5316\u98ce\u683c\u8fde\u63a5 MySQL<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$servername = \"localhost\"; \/\/ \u670d\u52a1\u5668\u5730\u5740\n$username = \"root\";        \/\/ MySQL \u7528\u6237\u540d\n$password = \"\";            \/\/ MySQL \u5bc6\u7801\n$database = \"testdb\";      \/\/ \u6570\u636e\u5e93\u540d\u79f0\n\n\/\/ \u521b\u5efa\u8fde\u63a5\n$conn = mysqli_connect($servername, $username, $password, $database);\n\n\/\/ \u68c0\u6d4b\u8fde\u63a5\u662f\u5426\u6210\u529f\nif (!$conn) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . mysqli_connect_error());\n}\necho \"\u8fde\u63a5\u6210\u529f\";\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1.2 \u9762\u5411\u5bf9\u8c61\u98ce\u683c\u8fde\u63a5 MySQL<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$servername = \"localhost\";\n$username = \"root\";\n$password = \"\";\n$database = \"testdb\";\n\n\/\/ \u521b\u5efa\u8fde\u63a5\n$conn = new mysqli($servername, $username, $password, $database);\n\n\/\/ \u68c0\u6d4b\u8fde\u63a5\nif ($conn-&gt;connect_error) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . $conn-&gt;connect_error);\n}\necho \"\u8fde\u63a5\u6210\u529f\";\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1.3 \u5173\u95ed MySQL \u8fde\u63a5<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>mysqli_close($conn); \/\/ \u8fc7\u7a0b\u5316\n$conn-&gt;close();      \/\/ \u9762\u5411\u5bf9\u8c61<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u4f7f\u7528 PDO \u8fde\u63a5 MySQL\uff08\u63a8\u8350\uff09<\/h2>\n\n\n\n<p>PDO\uff08PHP Data Objects\uff09\u662f\u4e00\u4e2a\u6570\u636e\u5e93\u62bd\u8c61\u5c42\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u5e93\u7c7b\u578b\uff0c\u5982 MySQL\u3001PostgreSQL\u3001SQLite \u7b49\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2.1 \u4f7f\u7528 PDO \u8fde\u63a5 MySQL<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$dsn = \"mysql:host=localhost;dbname=testdb;charset=utf8mb4\";\n$username = \"root\";\n$password = \"\";\n\ntry {\n    $pdo = new PDO($dsn, $username, $password, &#91;\n        PDO::ATTR_ERRMODE =&gt; PDO::ERRMODE_EXCEPTION \/\/ \u542f\u7528\u5f02\u5e38\u6a21\u5f0f\n    ]);\n    echo \"\u8fde\u63a5\u6210\u529f\";\n} catch (PDOException $e) {\n    die(\"\u8fde\u63a5\u5931\u8d25: \" . $e-&gt;getMessage());\n}\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2.2 \u5173\u95ed PDO \u8fde\u63a5<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>$pdo = null;<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u8fde\u63a5 MySQL \u65f6\u7684\u5e38\u89c1\u9519\u8bef\u4e0e\u89e3\u51b3\u65b9\u6848<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3.1 \u8fde\u63a5\u8d85\u65f6\u6216\u62d2\u7edd\u8bbf\u95ee<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9519\u8bef\u4fe1\u606f<\/strong><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  Warning: mysqli_connect(): (HY000\/1045): Access denied for user 'root'@'localhost' (using password: YES)<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong><\/li>\n\n\n\n<li>\u68c0\u67e5 MySQL \u8d26\u53f7\u5bc6\u7801\u662f\u5426\u6b63\u786e\u3002<\/li>\n\n\n\n<li>\u68c0\u67e5 MySQL \u662f\u5426\u5141\u8bb8\u8fdc\u7a0b\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>\u68c0\u67e5\u9632\u706b\u5899\u662f\u5426\u963b\u6321 3306 \u7aef\u53e3\uff08\u9ed8\u8ba4 MySQL \u7aef\u53e3\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3.2 \u6570\u636e\u5e93\u4e0d\u5b58\u5728<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9519\u8bef\u4fe1\u606f<\/strong><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  Warning: mysqli_connect(): (HY000\/1049): Unknown database 'testdb'<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong><\/li>\n\n\n\n<li>\u4f7f\u7528 <code>SHOW DATABASES;<\/code> \u68c0\u67e5\u6570\u636e\u5e93\u662f\u5426\u5b58\u5728\uff1a<br><code>sql SHOW DATABASES;<\/code><\/li>\n\n\n\n<li>\u4f7f\u7528 <code>CREATE DATABASE testdb;<\/code> \u521b\u5efa\u6570\u636e\u5e93\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3.3 \u7f16\u7801\u95ee\u9898\uff08\u4e2d\u6587\u4e71\u7801\uff09<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u89e3\u51b3\u65b9\u6848<\/strong><br>\u5728\u8fde\u63a5 MySQL \u65f6\uff0c\u6307\u5b9a <code>utf8mb4<\/code> \u7f16\u7801\uff1a<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  mysqli_set_charset($conn, \"utf8mb4\");<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\u5728 PDO \u8fde\u63a5\u5b57\u7b26\u4e32\u4e2d\u6dfb\u52a0 <code>charset=utf8mb4<\/code>\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. MySQL \u8fde\u63a5\u65b9\u5f0f\u5bf9\u6bd4\u603b\u7ed3<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u5f0f<\/th><th>\u517c\u5bb9\u6027<\/th><th>\u8bed\u6cd5\u98ce\u683c<\/th><th>\u9884\u5904\u7406\u652f\u6301<\/th><th>\u591a\u6570\u636e\u5e93\u652f\u6301<\/th><th>\u63a8\u8350\u4f7f\u7528<\/th><\/tr><\/thead><tbody><tr><td>MySQLi<\/td><td>\u4ec5\u9650 MySQL<\/td><td>\u9762\u5411\u8fc7\u7a0b &amp; \u9762\u5411\u5bf9\u8c61<\/td><td>\u2705 \u652f\u6301<\/td><td>\u274c \u4ec5\u9650 MySQL<\/td><td>\u63a8\u8350\u7528\u4e8e MySQL \u9879\u76ee<\/td><\/tr><tr><td>PDO<\/td><td>\u591a\u79cd\u6570\u636e\u5e93<\/td><td>\u4ec5\u9762\u5411\u5bf9\u8c61<\/td><td>\u2705 \u652f\u6301<\/td><td>\u2705 \u652f\u6301 MySQL\u3001PostgreSQL\u3001SQLite \u7b49<\/td><td>\u5f3a\u70c8\u63a8\u8350<\/td><\/tr><tr><td>MySQL \u6269\u5c55\uff08\u5df2\u5e9f\u5f03\uff09<\/td><td>\u4ec5\u9650 MySQL<\/td><td>\u9762\u5411\u8fc7\u7a0b<\/td><td>\u274c \u4e0d\u652f\u6301<\/td><td>\u274c \u4ec5\u9650 MySQL<\/td><td>\u4e0d\u63a8\u8350\uff08\u5df2\u88ab\u79fb\u9664\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u76f8\u5173\u94fe\u63a5\uff08\u6df1\u5165\u5b66\u4e60\uff09<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.php.net\/manual\/en\/\">PHP \u5b98\u65b9\u6587\u6863<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/dev.mysql.com\/doc\/\">MySQL \u5b98\u65b9\u6587\u6863<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.php.net\/manual\/en\/book.pdo.php\">PDO \u6559\u7a0b<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.w3schools.com\/php\/php_mysql_intro.asp\">MySQLi \u6559\u7a0b<\/a><\/li>\n<\/ul>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 PHP \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e09\u79cd\u4e3b\u8981\u65b9\u5f0f\u8fde\u63a5 MySQL \u6570\u636e\u5e93\uff1a MySQLi\uff08MySQL Improved [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3088,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[],"class_list":["post-3087","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3087"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3087\/revisions"}],"predecessor-version":[{"id":3089,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3087\/revisions\/3089"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3088"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}