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

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><H1
><A
NAME="function.dbx-connect"
></A
>dbx_connect</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN35259"
></A
><P
>    (PHP 4 &#62;= 4.0.6, PHP 5 &#60;= 5.0.4)</P
>dbx_connect&nbsp;--&nbsp;Open a connection/database</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35262"
></A
><H2
>说明</H2
>object <B
CLASS="methodname"
>dbx_connect</B
> ( mixed module, string host, string database, string username, string password [, int persistent] )<BR
></BR
><P
>&#13;   Opens a connection to a database.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35286"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>module</CODE
></DT
><DD
><P
>&#13;       The <CODE
CLASS="parameter"
>module</CODE
> parameter can be either a string or a
       constant, though the latter form is preferred. The possible values are 
       given below, but keep in mind that they only work if the module is 
       actually loaded.
      </P
><P
>&#13;       <P
></P
><UL
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_MYSQL</B
></TT
> or "mysql"
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_ODBC</B
></TT
> or "odbc"
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_PGSQL</B
></TT
> or "pgsql"
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_MSSQL</B
></TT
> or "mssql"
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_FBSQL</B
></TT
> or "fbsql" (available from PHP 4.1.0)
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_SYBASECT</B
></TT
> or "sybase_ct" (available from PHP
          4.2.0)
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_OCI8</B
></TT
> or "oci8" (available from PHP 4.3.0)
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_SQLITE</B
></TT
> or "sqlite" (PHP 5)
         </P
></LI
></UL
>
      </P
></DD
><DT
><CODE
CLASS="parameter"
>host</CODE
></DT
><DD
><P
>&#13;       The SQL server host
      </P
></DD
><DT
><CODE
CLASS="parameter"
>database</CODE
></DT
><DD
><P
>&#13;       The database name
      </P
></DD
><DT
><CODE
CLASS="parameter"
>username</CODE
></DT
><DD
><P
>&#13;       The username
      </P
></DD
><DT
><CODE
CLASS="parameter"
>password</CODE
></DT
><DD
><P
>&#13;       The password
      </P
></DD
><DT
><CODE
CLASS="parameter"
>persistent</CODE
></DT
><DD
><P
>&#13;       The <CODE
CLASS="parameter"
>persistent</CODE
> parameter can be set to 
       <TT
CLASS="constant"
><B
>DBX_PERSISTENT</B
></TT
>, if so, a persistent connection
       will be created.
      </P
></DD
></DL
></DIV
>
  </P
><P
>&#13;   The <CODE
CLASS="parameter"
>host</CODE
>, <CODE
CLASS="parameter"
>database</CODE
>, 
   <CODE
CLASS="parameter"
>username</CODE
> and <CODE
CLASS="parameter"
>password</CODE
> 
   parameters are expected, but not always used depending on the connect
   functions for the abstracted module.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35354"
></A
><H2
>返回值</H2
><P
>&#13;   Returns an object on success, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on error. If a connection has been
   made but the database could not be selected, the connection is closed and
   <TT
CLASS="constant"
><B
>FALSE</B
></TT
> is returned. 
  </P
><P
>&#13;   The returned <CODE
CLASS="varname"
>object</CODE
> has three properties:
   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><SPAN
CLASS="property"
>database</SPAN
></DT
><DD
><P
>&#13;       It is the name of the currently selected database. 
      </P
></DD
><DT
><SPAN
CLASS="property"
>handle</SPAN
></DT
><DD
><P
>&#13;       It is a valid handle for the connected database, and as such it can be
       used in module-specific functions (if required).
       <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN35372"
></A
><TABLE
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CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">dbx_connect</font><font color="#007700">(</font><font color="#0000BB">DBX_MYSQL</font><font color="#007700">, </font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"db"</font><font color="#007700">, </font><font color="#DD0000">"username"</font><font color="#007700">, </font><font color="#DD0000">"password"</font><font color="#007700">);<br /></font><font color="#0000BB">mysql_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">-&gt;</font><font color="#0000BB">handle</font><font color="#007700">); </font><font color="#FF8000">// dbx_close($link) would be better here<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
></P
></DIV
>
      </P
></DD
><DT
><SPAN
CLASS="property"
>module</SPAN
></DT
><DD
><P
>&#13;       It is used internally by dbx only, and is actually the module number
       mentioned above.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35379"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN35382"
></A
><P
><B
>例 1. <B
CLASS="function"
>dbx_connect()</B
> example</B
></P
><TABLE
BORDER="0"
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">dbx_connect</font><font color="#007700">(</font><font color="#0000BB">DBX_ODBC</font><font color="#007700">, </font><font color="#DD0000">""</font><font color="#007700">, </font><font color="#DD0000">"db"</font><font color="#007700">, </font><font color="#DD0000">"username"</font><font color="#007700">, </font><font color="#DD0000">"password"</font><font color="#007700">, </font><font color="#0000BB">DBX_PERSISTENT</font><font color="#007700">)<br />&nbsp;&nbsp;&nbsp;&nbsp;or die(</font><font color="#DD0000">"Could not connect"</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"Connected successfully"</font><font color="#007700">;<br /></font><font color="#0000BB">dbx_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35386"
></A
><H2
>注释</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    Always refer to the module-specific documentation as well.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35390"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><TR
><TD
><A
HREF="function.dbx-close.html"
><B
CLASS="function"
>dbx_close()</B
></A
></TD
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></P
>
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