{"id":13654,"date":"2024-03-15T07:33:28","date_gmt":"2024-03-15T07:33:28","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-fix-errors-with-the-mysqli_num_rows-function-in-php\/"},"modified":"2025-08-05T21:37:16","modified_gmt":"2025-08-05T21:37:16","slug":"how-to-fix-errors-with-the-mysqli_num_rows-function-in-php","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-fix-errors-with-the-mysqli_num_rows-function-in-php\/","title":{"rendered":"PHP mysqli_num_rows Error Solutions"},"content":{"rendered":"<p>In PHP, the mysqli_num_rows function is used to get the number of rows returned by a query. If this function gives an error, it is usually due to incorrect parameters being passed or errors in the query statement.<\/p>\n<p>The solution is as follows:<\/p>\n<ol>\n<li>Ensure that you are properly connected to the database and have obtained a valid connection object. You can use the mysqli_connect function to connect to the database.<\/li>\n<li>Make sure you have executed the query statement and that the query results are saved in a valid result set object. You can use the mysqli_query function to execute the query statement and store the results in a variable.<\/li>\n<li>Before calling the mysqli_num_rows function, make sure you have checked if the query operation was successful. You can use the mysqli_error function to check for any errors that may have occurred.<\/li>\n<li>Make sure you pass the correct parameter when calling the mysqli_num_rows function. The function takes a result set object as a parameter.<\/li>\n<\/ol>\n<p>Here is an example code that demonstrates how to correctly use the mysqli_num_rows function:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ \u8fde\u63a5\u5230\u6570\u636e\u5e93<\/span>\r\n<span class=\"hljs-variable\">$conn<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_connect<\/span>(<span class=\"hljs-string\">\"localhost\"<\/span>, <span class=\"hljs-string\">\"username\"<\/span>, <span class=\"hljs-string\">\"password\"<\/span>, <span class=\"hljs-string\">\"database\"<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u68c0\u67e5\u8fde\u63a5\u662f\u5426\u6210\u529f<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> (!<span class=\"hljs-variable\">$conn<\/span>) {\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-comment\">\/\/ \u6267\u884c\u67e5\u8be2\u8bed\u53e5<\/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-string\">\"SELECT * FROM table\"<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u68c0\u67e5\u67e5\u8be2\u662f\u5426\u6210\u529f<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> (!<span class=\"hljs-variable\">$result<\/span>) {\r\n    <span class=\"hljs-keyword\">die<\/span>(<span class=\"hljs-string\">\"\u67e5\u8be2\u9519\u8bef: \"<\/span> . <span class=\"hljs-title function_ invoke__\">mysqli_error<\/span>(<span class=\"hljs-variable\">$conn<\/span>));\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\u7684\u884c\u6570<\/span>\r\n<span class=\"hljs-variable\">$numRows<\/span> = <span class=\"hljs-title function_ invoke__\">mysqli_num_rows<\/span>(<span class=\"hljs-variable\">$result<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u67e5\u8be2\u7ed3\u679c\u7684\u884c\u6570<\/span>\r\n<span class=\"hljs-keyword\">echo<\/span> <span class=\"hljs-string\">\"\u67e5\u8be2\u7ed3\u679c\u7684\u884c\u6570\u4e3a: \"<\/span> . <span class=\"hljs-variable\">$numRows<\/span>;\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5<\/span>\r\n<span class=\"hljs-title function_ invoke__\">mysqli_close<\/span>(<span class=\"hljs-variable\">$conn<\/span>);\r\n<\/code><\/pre>\n<p>Please note that the above examples are for reference only and actual results may vary depending on database configurations and query statements. You may need to make adjustments accordingly based on your specific situation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In PHP, the mysqli_num_rows function is used to get the number of rows returned by a query. If this function gives an error, it is usually due to incorrect parameters being passed or errors in the query statement. The solution is as follows: Ensure that you are properly connected to the database and have obtained [&hellip;]<\/p>\n","protected":false},"author":13,"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":[1613,18233,18231,18232,18230],"class_list":["post-13654","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-mysql-troubleshooting","tag-mysqli_num_rows-solution","tag-php-database-errors","tag-php-error-fixing","tag-php-mysqli_num_rows"],"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 Error Solutions - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Complete guide to fixing mysqli_num_rows errors in PHP. 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