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>mysql_field_type</H1
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><P
> (PHP 3, PHP 4, PHP 5)</P
>mysql_field_type --
取得结果集中指定字段的类型
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>说明</H2
>string <B
CLASS="methodname"
>mysql_field_type</B
> ( resource result, int field_offset )<BR
></BR
><P
> <B
CLASS="function"
>mysql_field_type()</B
> 和
<A
HREF="function.mysql-field-name.html"
><B
CLASS="function"
>mysql_field_name()</B
></A
>
函数相似。参数完全相同，但返回的是字段类型而不是字段名。字段类型有“int”，“real”，“string”，“blob”以及其它，详见
<A
HREF="http://dev.mysql.com/doc/"
TARGET="_top"
>MySQL 手册</A
>。
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><B
>例 1. <B
CLASS="function"
>mysql_field_type()</B
> 例子</B
></P
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><code><font color="#000000">
<font color="#0000BB"><?php<br /> mysql_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"mysql_username"</font><font color="#007700">, </font><font color="#DD0000">"mysql_password"</font><font color="#007700">);<br /> </font><font color="#0000BB">mysql_select_db</font><font color="#007700">(</font><font color="#DD0000">"mysql"</font><font color="#007700">);<br /> </font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">"SELECT * FROM func"</font><font color="#007700">);<br /> </font><font color="#0000BB">$fields </font><font color="#007700">= </font><font color="#0000BB">mysql_num_fields</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">$rows </font><font color="#007700">= </font><font color="#0000BB">mysql_num_rows</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">$table </font><font color="#007700">= </font><font color="#0000BB">mysql_field_table</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /> echo </font><font color="#DD0000">"Your '"</font><font color="#007700">.</font><font color="#0000BB">$table</font><font color="#007700">.</font><font color="#DD0000">"' table has "</font><font color="#007700">.</font><font color="#0000BB">$fields</font><font color="#007700">.</font><font color="#DD0000">" fields and "</font><font color="#007700">.</font><font color="#0000BB">$rows</font><font color="#007700">.</font><font color="#DD0000">" record(s)\n"</font><font color="#007700">;<br /> echo </font><font color="#DD0000">"The table has the following fields:\n"</font><font color="#007700">;<br /> for (</font><font color="#0000BB">$i</font><font color="#007700">=</font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$i </font><font color="#007700">< </font><font color="#0000BB">$fields</font><font color="#007700">; </font><font color="#0000BB">$i</font><font color="#007700">++) {<br /> </font><font color="#0000BB">$type </font><font color="#007700">= </font><font color="#0000BB">mysql_field_type</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">);<br /> </font><font color="#0000BB">$name </font><font color="#007700">= </font><font color="#0000BB">mysql_field_name</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">);<br /> </font><font color="#0000BB">$len </font><font color="#007700">= </font><font color="#0000BB">mysql_field_len</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">);<br /> </font><font color="#0000BB">$flags </font><font color="#007700">= </font><font color="#0000BB">mysql_field_flags</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">);<br /> echo </font><font color="#0000BB">$type</font><font color="#007700">.</font><font color="#DD0000">" "</font><font color="#007700">.</font><font color="#0000BB">$name</font><font color="#007700">.</font><font color="#DD0000">" "</font><font color="#007700">.</font><font color="#0000BB">$len</font><font color="#007700">.</font><font color="#DD0000">" "</font><font color="#007700">.</font><font color="#0000BB">$flags</font><font color="#007700">.</font><font color="#DD0000">"\n"</font><font color="#007700">;<br /> }<br /> </font><font color="#0000BB">mysql_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">mysql_close</font><font color="#007700">();<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
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><P
> 以上例子将产生如下输出：
</P
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><PRE
CLASS="screen"
>Your 'func' table has 4 fields and 1 record(s)
The table has the following fields:
string name 64 not_null primary_key binary
int ret 1 not_null
string dl 128 not_null
string type 9 not_null enum</PRE
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>
</P
><P
> 为向下兼容仍然可以使用
<B
CLASS="function"
>mysql_fieldtype()</B
>，但反对这样做。
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