{"id":4025,"date":"2024-03-13T07:50:09","date_gmt":"2024-03-13T07:50:09","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-does-php-read-mysql-data\/"},"modified":"2025-07-31T00:37:04","modified_gmt":"2025-07-31T00:37:04","slug":"how-does-php-read-mysql-data","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-does-php-read-mysql-data\/","title":{"rendered":"PHP MySQL Data Retrieval Tutorial"},"content":{"rendered":"<p>In PHP, you can use the MySQLi or PDO extension to fetch MySQL data.<\/p>\n<p>The following is an example of code using MySQLi extension to fetch data from MySQL.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">&lt;?php<\/span>\r\n\r\n<span class=\"hljs-comment\">\/\/ \u8fde\u63a5\u6570\u636e\u5e93<\/span>\r\n<span class=\"hljs-variable\">$servername<\/span> = <span class=\"hljs-string\">\"localhost\"<\/span>;\r\n<span class=\"hljs-variable\">$username<\/span> = <span class=\"hljs-string\">\"username\"<\/span>;\r\n<span class=\"hljs-variable\">$password<\/span> = <span class=\"hljs-string\">\"password\"<\/span>;\r\n<span class=\"hljs-variable\">$dbname<\/span> = <span class=\"hljs-string\">\"dbname\"<\/span>;\r\n\r\n<span class=\"hljs-variable\">$conn<\/span> = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title function_ invoke__\">mysqli<\/span>(<span class=\"hljs-variable\">$servername<\/span>, <span class=\"hljs-variable\">$username<\/span>, <span class=\"hljs-variable\">$password<\/span>, <span class=\"hljs-variable\">$dbname<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u68c0\u67e5\u8fde\u63a5\u662f\u5426\u6210\u529f<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-variable\">$conn<\/span>-&gt;connect_error) {\r\n    <span class=\"hljs-keyword\">die<\/span>(<span class=\"hljs-string\">\"\u8fde\u63a5\u5931\u8d25: \"<\/span> . <span class=\"hljs-variable\">$conn<\/span>-&gt;connect_error);\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u67e5\u8be2\u6570\u636e<\/span>\r\n<span class=\"hljs-variable\">$sql<\/span> = <span class=\"hljs-string\">\"SELECT id, name, email FROM users\"<\/span>;\r\n<span class=\"hljs-variable\">$result<\/span> = <span class=\"hljs-variable\">$conn<\/span>-&gt;<span class=\"hljs-title function_ invoke__\">query<\/span>(<span class=\"hljs-variable\">$sql<\/span>);\r\n\r\n<span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-variable\">$result<\/span>-&gt;num_rows &gt; <span class=\"hljs-number\">0<\/span>) {\r\n    <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u6570\u636e<\/span>\r\n    <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-variable\">$row<\/span> = <span class=\"hljs-variable\">$result<\/span>-&gt;<span class=\"hljs-title function_ invoke__\">fetch_assoc<\/span>()) {\r\n        <span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"id: \"<\/span> . <span class=\"hljs-variable\">$row<\/span>[<span class=\"hljs-string\">\"id\"<\/span>]. <span class=\"hljs-string\">\" - Name: \"<\/span> . <span class=\"hljs-variable\">$row<\/span>[<span class=\"hljs-string\">\"name\"<\/span>]. <span class=\"hljs-string\">\" - Email: \"<\/span> . <span class=\"hljs-variable\">$row<\/span>[<span class=\"hljs-string\">\"email\"<\/span>]. <span class=\"hljs-string\">\"&lt;br&gt;\"<\/span>;\r\n    }\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\n    <span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"\u6ca1\u6709\u67e5\u8be2\u5230\u6570\u636e\"<\/span>;\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5173\u95ed\u8fde\u63a5<\/span>\r\n<span class=\"hljs-variable\">$conn<\/span>-&gt;<span class=\"hljs-title function_ invoke__\">close<\/span>();\r\n\r\n<span class=\"hljs-meta\">?&gt;<\/span>\r\n<\/code><\/pre>\n<p>Please note that this is just a simple example code. In a real project, you may need more error handling and security checks to ensure data safety.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In PHP, you can use the MySQLi or PDO extension to fetch MySQL data. The following is an example of code using MySQLi extension to fetch data from MySQL. &lt;?php \/\/ \u8fde\u63a5\u6570\u636e\u5e93 $servername = &#8220;localhost&#8221;; $username = &#8220;username&#8221;; $password = &#8220;password&#8221;; $dbname = &#8220;dbname&#8221;; $conn = new mysqli($servername, $username, $password, $dbname); \/\/ \u68c0\u67e5\u8fde\u63a5\u662f\u5426\u6210\u529f if ($conn-&gt;connect_error) [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[2489,1788,3136,3137,3135],"class_list":["post-4025","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-data-retrieval","tag-database-connection","tag-mysqli","tag-pdo","tag-php-mysql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP MySQL Data Retrieval Tutorial - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to retrieve MySQL data using PHP with MySQLi and PDO. Step-by-step tutorial with code examples for database connections and queries.\" \/>\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\/blog\/how-does-php-read-mysql-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP MySQL Data Retrieval Tutorial\" \/>\n<meta property=\"og:description\" content=\"Learn how to retrieve MySQL data using PHP with MySQLi and PDO. 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