PHP mysqli_field_seek()Functions

PHP MySQLi Reference Manual

Set the field pointer in the result set to the first field (column), then retrieve field information via mysqli_fetch_field() and output field name, table, and maximum length:

<?php 
// 假定数据库用户名：root，密码：123456，数据库：EXAMPLE 
$con=mysqli_connect("localhost","root","123456","EXAMPLE"); 
if (mysqli_connect_errno($con)) 
{ 
    echo "连接 MySQL 失败: " . mysqli_connect_error(); 
} 

$sql="SELECT name,url FROM websites ORDER BY alexa";

if ($result=mysqli_query($con,$sql))
{
    // 获取第一列 ("name") 的字段信息
    mysqli_field_seek($result,0);
    $fieldinfo=mysqli_fetch_field($result);

    printf("字段名: %s",$fieldinfo->name);
    echo "<br>";
    printf("表名: %s",$fieldinfo->table);
    echo "<br>";
    printf("字段长度: %d",$fieldinfo->max_length);

    // 释放结果集
    mysqli_free_result($result);
}

mysqli_close($con);
?>

Definition and Usage

The mysqli_field_seek() function sets the field pointer to the offset of a specified field.

Syntax

Technical Details

PHP MySQLi Reference Manual