The 5th Annual China PHP Conference


(PHP 4, PHP 5)

mysql_fetch_lengths 取得结果集中每个输出的长度


array mysql_fetch_lengths ( resource $result )

以数组返回上一次用 mysql_fetch_row() 取得的行中每个字段的长度,如果出错返回 FALSE

mysql_fetch_lengths() 将上一次 mysql_fetch_row()mysql_fetch_array()mysql_fetch_object() 所返回的每个列的长度储存到一个数组中,偏移量从 0 开始。

参见 mysql_fetch_row()

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User Contributed Notes 1 note

Bavo Janss
7 years ago
In case of UTF8 fields mysql_field_len() will return 3 times the maximum length (e.g. 30 for a VARCHAR(10) field)) for mysql_field_len() returns the byte length of the field not the defined size.
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