An alternative (if you know that your query should have returned a result set) is to replace themysql_errno(&mysql)call with a check whethermysql_field_count(&mysql)returns 0. This happens only if something went wrong.
An alternative (if you know that your query should have returned a result set) is to replace themysql_errno(&mysql)call with a check whethermysql_field_count(&mysql)returns 0. This happens only if something went wrong.
"数据库名");// 检查连接是否成功if($mysqli->connect_error){die("连接失败: ".$mysqli->connect_error);}// 执行查询$result=$mysqli->query("SELECT * FROM 表名");// 获取字段数$fieldCount=$result->field_count;echo"结果集字段数: ".$fieldCount;// 关闭连接$mysqli->close();?
mysql_num_fields和mysql_field_count都是获取结果中列的个数,但是这两个函数在使用的时候是存在区别的。 先看一段代码(上篇文章提供的数据库):#include <mysql/mysql.h> #include <stdio.h> #include <stdlib.h> #include <string.h> Mysql sum 返回了字符串 ...
如果要改为传递 MYSQL* 参数,请使用 unsigned int mysql_field_count(MYSQL *mysql)。 返回值 返回一个无符号整数,表示结果集中的列数。 报错信息 无。 使用说明 您可以通过结果集指针或连接句柄获取列数。如果 mysql_store_result() 或mysql_use_result() 返回NULL,说明没有结果集指针,则可以使用连接句柄。在...
To pass a MYSQL* argument instead, use unsigned int mysql_field_count(MYSQL *mysql). Description Returns the number of columns in a result set. You can get the number of columns either from a pointer to a result set or to a connection handler. You would use the connection handler if...
mysql_errno（）是否返回非零字符串，mysql_field_count（）是否返回零。你应该重写代码如下：
mysql_errno（）是否返回非零字符串，mysql_field_count（）是否返回零。你应该重写代码如下：
(3, 'Kumara', 'Sangakkara', 'Matale', 'Srilanka')"); print("Record Inserted...\n"); //Retrieving the contents of the table $result = mysqli_query($con, "SELECT * FROM myplayers"); //Number of fields $count = mysqli_num_fields($result); print("Number of fields in the resul...
Mysql的mysql_store_result/mysql_use_result,mysql_field_count/mysql_num_fields/mysql_num_rows函数区别,代码先锋网,一个为软件开发程序员提供代码片段和技术文章聚合的网站。