mysql_field_len
(PHP 4, PHP 5)
mysql_field_len — 返回指定字段的长度
说明
mysql_field_len(resource
$result, int $field_offset): intmysql_field_len() 返回指定字段的长度。
为向下兼容仍然可以使用 mysql_fieldlen()，但反对这样做。
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User Contributed Notes 2 notes
rvwoens at gmail dot com ¶
10 years ago
Note that for some reason the length of fields is 3 times the actual value if you are using UTF8 encoding.. So a varchar(10) field returns 30 here. This renders this function almost useless.
adam_nospam_hunger at yahoo dot com ¶
18 years ago
For a mysql type DECIMAL(8,4), the length is returned as 10 (M+2 as per documentation).
备份地址：http://www.lvesu.com/blog/php/function.mysql-field-len.php