例
获取所有字段字段信息,然后获得与当前场mysqli_field_tell()并打印出每个列的名称,表,最大长度:
<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="SELECT Lastname,Age FROM Persons ORDER BY Lastname";
if ($result=mysqli_query($con,$sql))
{
// Get
field info for all fields
while
($fieldinfo=mysqli_fetch_field($result))
{
// Get field cursor position
$currentfield=mysqli_field_tell($result);
printf("Column %d:\n", $currentfield);
printf("Name:
%s\n", $fieldinfo->name);
printf("Table: %s\n",
$fieldinfo->table);
}
// Free result
set
mysqli_free_result($result);
}
mysqli_close($con);
?>
定义和用法
所述mysqli_field_tell()函数返回场光标的位置。
句法
mysqli_field_tell( result ) ;
参数 | 描述 |
---|---|
result | 需要。 指定由返回的结果集标识符mysqli_query() mysqli_store_result()或mysqli_use_result() |
技术细节
返回值: | 返回当前字段光标偏移 |
---|---|
PHP版本: | 5+ |
<PHP库MySQLi参考