格式：
integer mysql_field_len (resource result_set, integer field_offset)
例：
$query = "select name from MyTable";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_len($result, 0)."<br />";
说明：
如果mysql_field_len($reseult, 0) = 16777215
那么numer_format(mysql_field_len($result))等于16,777,215
23、mysql_field_name()-获取字段名
格式：
string mysql_field_name (resource result_set, int field_offset)
例：
$query = "select id as PKID, name from MyTable order by name";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_name($result, 0); // Result: PKID
24、mysql_field_type()-获取字段类型
格式：
string mysql_field_type (resource result_set, int field_offset)
例：
$query = "select id, name from MyTable order by name";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_type($result, 0); // Result: int
25、mysql_field_table()-获取字段所在表名
格式：
string mysql_field_table (resource result_set, int field_offset)
例：
$query = "select id as PKID, name from MyTable order by name";
$result = mysql_query($query);
$row = mysql_fetch_row($result);
echo mysql_field_table($result, 0); // Result: MyTable
