{"id":12333,"date":"2024-03-14T15:36:58","date_gmt":"2024-03-14T15:36:58","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-mysqli_num_rows-in-php\/"},"modified":"2025-08-05T00:16:01","modified_gmt":"2025-08-05T00:16:01","slug":"how-to-use-mysqli_num_rows-in-php","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-mysqli_num_rows-in-php\/","title":{"rendered":"PHP mysqli_num_rows Tutorial"},"content":{"rendered":"<p>The mysqli_num_rows function is used to retrieve the number of rows in a result set. The usage is as follows:<\/p>\n<p>1. Establish a connection to the database:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$conn<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_connect<\/span>(<span class=\"hljs-string\">\"localhost\"<\/span>, <span class=\"hljs-string\">\"username\"<\/span>, <span class=\"hljs-string\">\"password\"<\/span>, <span class=\"hljs-string\">\"database_name\"<\/span>);\r\n<span class=\"hljs-keyword\">if<\/span> (!<span class=\"hljs-variable\">$conn<\/span>) {\r\n    <span class=\"hljs-keyword\">die<\/span>(<span class=\"hljs-string\">\"\u8fde\u63a5\u5931\u8d25: \"<\/span> . <span class=\"hljs-title function_ invoke__\">mysqli_connect_error<\/span>());\r\n}\r\n<\/code><\/pre>\n<p>2. Execute an SQL query and retrieve the result set.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$sql<\/span> = <span class=\"hljs-string\">\"SELECT * FROM table_name\"<\/span>;\r\n<span class=\"hljs-variable\">$result<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_query<\/span>(<span class=\"hljs-variable\">$conn<\/span>, <span class=\"hljs-variable\">$sql<\/span>);\r\n<\/code><\/pre>\n<p>3. Retrieve the number of rows in the result set using the mysqli_num_rows function.<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$row_count<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_num_rows<\/span>(<span class=\"hljs-variable\">$result<\/span>);\r\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"\u884c\u6570\uff1a\"<\/span> . <span class=\"hljs-variable\">$row_count<\/span>;\r\n<\/code><\/pre>\n<p>The complete sample code is shown below:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-variable\">$conn<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_connect<\/span>(<span class=\"hljs-string\">\"localhost\"<\/span>, <span class=\"hljs-string\">\"username\"<\/span>, <span class=\"hljs-string\">\"password\"<\/span>, <span class=\"hljs-string\">\"database_name\"<\/span>);\r\n<span class=\"hljs-keyword\">if<\/span> (!<span class=\"hljs-variable\">$conn<\/span>) {\r\n    <span class=\"hljs-keyword\">die<\/span>(<span class=\"hljs-string\">\"\u8fde\u63a5\u5931\u8d25: \"<\/span> . <span class=\"hljs-title function_ invoke__\">mysqli_connect_error<\/span>());\r\n}\r\n\r\n<span class=\"hljs-variable\">$sql<\/span> = <span class=\"hljs-string\">\"SELECT * FROM table_name\"<\/span>;\r\n<span class=\"hljs-variable\">$result<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_query<\/span>(<span class=\"hljs-variable\">$conn<\/span>, <span class=\"hljs-variable\">$sql<\/span>);\r\n<span class=\"hljs-variable\">$row_count<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_num_rows<\/span>(<span class=\"hljs-variable\">$result<\/span>);\r\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"\u884c\u6570\uff1a\"<\/span> . <span class=\"hljs-variable\">$row_count<\/span>;\r\n\r\n<span class=\"hljs-title function_ invoke__\">mysqli_close<\/span>(<span class=\"hljs-variable\">$conn<\/span>);\r\n<\/code><\/pre>\n<p>Note: Before using the mysqli_num_rows function, ensure that the SQL query has been executed and the result set has been obtained.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The mysqli_num_rows function is used to retrieve the number of rows in a result set. The usage is as follows: 1. Establish a connection to the database: $conn = mysqli_connect(&#8220;localhost&#8221;, &#8220;username&#8221;, &#8220;password&#8221;, &#8220;database_name&#8221;); if (!$conn) { die(&#8220;\u8fde\u63a5\u5931\u8d25: &#8221; . mysqli_connect_error()); } 2. Execute an SQL query and retrieve the result set. $sql = &#8220;SELECT * [&hellip;]<\/p>\n","protected":false},"author":12,"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":[16115,16077,11518,690,891],"class_list":["post-12333","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-mysqli-functions","tag-mysqli_num_rows","tag-php-database","tag-php-programming","tag-php-tutorial"],"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 mysqli_num_rows Tutorial - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use mysqli_num_rows in PHP to count database rows. 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