Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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>pg_connect</H1
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><P
>    (PHP 3, PHP 4, PHP 5)</P
>pg_connect&nbsp;--&nbsp;打开一个 PostgreSQL 连接</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN184665"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>pg_connect</B
> ( string connection_string )<BR
></BR
><P
>&#13;     <B
CLASS="function"
>pg_connect()</B
> 返回其它 PostgreSQL 函数所需要的资源。
    </P
><P
>&#13;     <B
CLASS="function"
>pg_connect()</B
> 打开一个由
     <CODE
CLASS="parameter"
>connection_string</CODE
> 所指定的
     PostgreSQL 数据库的连接。如果成功则返回连接资源，如果不能连接则返回
     <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。<CODE
CLASS="parameter"
>connection_string</CODE
> 应该是用引号引起来的字符串。
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><B
>例 1. 使用 <B
CLASS="function"
>pg_connect()</B
></B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$dbconn </font><font color="#007700">= </font><font color="#0000BB">pg_connect</font><font color="#007700">(</font><font color="#DD0000">"dbname=mary"</font><font color="#007700">);<br /></font><font color="#FF8000">//connect to a database named "mary"<br /></font><font color="#0000BB">$dbconn2 </font><font color="#007700">= </font><font color="#0000BB">pg_connect</font><font color="#007700">(</font><font color="#DD0000">"host=localhost port=5432 dbname=mary"</font><font color="#007700">);<br /></font><font color="#FF8000">// connect to a database named "mary" on "localhost" at port "5432"<br /></font><font color="#0000BB">$dbconn3 </font><font color="#007700">= </font><font color="#0000BB">pg_connect</font><font color="#007700">(</font><font color="#DD0000">"host=sheep port=5432 dbname=mary user=lamb password=foo"</font><font color="#007700">);<br /></font><font color="#FF8000">//connect to a database named "mary" on the host "sheep" with a username and password<br /><br /></font><font color="#0000BB">$conn_string </font><font color="#007700">= </font><font color="#DD0000">"host=sheep port=5432 dbname=test user=lamb password=bar"</font><font color="#007700">;<br /></font><font color="#0000BB">$dbconn4 </font><font color="#007700">= </font><font color="#0000BB">pg_connect</font><font color="#007700">(</font><font color="#0000BB">$conn_string</font><font color="#007700">);<br /></font><font color="#FF8000">//connect to a database named "test" on the host "sheep" with a username and password<br /></font><font color="#0000BB">?&gt;</font>
</font>
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>
     <CODE
CLASS="parameter"
>connection_string</CODE
> 所包括的参数有
     <CODE
CLASS="parameter"
>host</CODE
>，<CODE
CLASS="parameter"
>port</CODE
>，<CODE
CLASS="parameter"
>tty</CODE
>, <CODE
CLASS="parameter"
>options</CODE
>，<CODE
CLASS="parameter"
>dbname</CODE
>, <CODE
CLASS="parameter"
>user</CODE
>
     和 <CODE
CLASS="parameter"
>password</CODE
>。
    </P
><P
>&#13;     如果用同样的 <CODE
CLASS="parameter"
>connection_string</CODE
> 再次调用
     <B
CLASS="function"
>pg_connect()</B
>，不会建立新连接，而是返回前面已经打开的连接资源。如果使用不同的连接字符串，则可以和同一个数据库建立多个连接。
    </P
><P
>&#13;     旧的多参数语法 <B
CLASS="command"
>$conn = pg_connect("host", "port", "options", "tty", "dbname")</B
> 已经不提倡使用。
    </P
><P
>&#13;     参见 <A
HREF="function.pg-pconnect.html"
><B
CLASS="function"
>pg_pconnect()</B
></A
>，<A
HREF="function.pg-close.html"
><B
CLASS="function"
>pg_close()</B
></A
>，<A
HREF="function.pg-host.html"
><B
CLASS="function"
>pg_host()</B
></A
>，<A
HREF="function.pg-port.html"
><B
CLASS="function"
>pg_port()</B
></A
>, <A
HREF="function.pg-tty.html"
><B
CLASS="function"
>pg_tty()</B
></A
>，<A
HREF="function.pg-options.html"
><B
CLASS="function"
>pg_options()</B
></A
>
     和 <A
HREF="function.pg-dbname.html"
><B
CLASS="function"
>pg_dbname()</B
></A
>。
    </P
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