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# mysql_field_name

(PHP 3, PHP 4 , PHP 5)

mysql_field_name -- Get the name of the specified field in a result

## Description

string mysql_field_name ( resource result, int field_index)

mysql_field_name() returns the name of the specified field index. result must be a valid result identifier and field_index is the numerical offset of the field.

> 備注: field_index starts at 0.

> e.g. The index of the third field would actually be 2, the index of the fourth field would be 3 and so on.

> 備注:此函數傳回的欄位是有大小寫之分。

示範 1.mysql_field_name() example
`<?php /* The users table consists of three fields: * user_id * username * password. */ $link = mysql_connect('localhost', 'mysql_user', 'mysql_password'); if (!$db_selected) { die('Could not set $dbname: ' . mysql_error()); } $dbname = 'mydb'; $db_selected = mysql_select_db($dbname, $link); if (!$db_selected) { die('Could not set $dbname: ' . mysql_error()); } $res = mysql_query('select * from users', $link); echo mysql_field_name($res, 0) . "\n"; echo mysql_field_name($res, 2); ?>`
The above example would produce the following output:
    user_id
    password

For downwards compatibility mysql_fieldname() can also be used. This is deprecated, however.

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