mysql_field_type

Function name: mysql_field_type()

Function Description: The mysql_field_type() function returns the type of the specified field.

Applicable version: This function has been deprecated in PHP 5.5.0 and has been removed in PHP 7.0.0. It is recommended to use the mysqli or PDO_MySQL extension as an alternative.

Usage: mysql_field_type ( resource $result , int $field_offset )

parameter:

• $result: Required. Represents the result resource of a MySQL query.
• $field_offset: Required. Indicates the offset of the field, counting from 0.

Return value: If successful, return the type name (string) of the specified field. If it fails, false is returned.

Example:

 // 连接到MySQL 数据库$link = mysql_connect("localhost", "username", "password"); if (!$link) { die('连接失败: ' . mysql_error()); } // 选择数据库mysql_select_db("database_name", $link); // 执行查询$result = mysql_query("SELECT * FROM table_name", $link); // 获取第一个字段的类型$field_type = mysql_field_type($result, 0); // 输出结果echo "第一个字段的类型是：" . $field_type; // 释放结果集mysql_free_result($result); // 关闭连接mysql_close($link);

Note: Since this function has been deprecated and removed from PHP version 7.0.0, it is recommended to use the mysqli or PDO_MySQL extension to connect to and manipulate the MySQL database.