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

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><H1
><A
NAME="function.dbx-query"
></A
>dbx_query</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN35540"
></A
><P
>    (PHP 4 &#62;= 4.0.6, PHP 5 &#60;= 5.0.4)</P
>dbx_query&nbsp;--&nbsp;Send a query and fetch all results (if any)</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35543"
></A
><H2
>说明</H2
>mixed <B
CLASS="methodname"
>dbx_query</B
> ( object link_identifier, string sql_statement [, int flags] )<BR
></BR
><P
>&#13;   Sends a query and fetch all results.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35558"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>link_identifier</CODE
></DT
><DD
><P
>&#13;       The DBX link object returned by <A
HREF="function.dbx-connect.html"
><B
CLASS="function"
>dbx_connect()</B
></A
>
      </P
></DD
><DT
><CODE
CLASS="parameter"
>sql_statement</CODE
></DT
><DD
><P
>&#13;       SQL statement.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>flags</CODE
></DT
><DD
><P
>&#13;       The compared column
      </P
></DD
><DT
><CODE
CLASS="parameter"
>flags</CODE
></DT
><DD
><P
>&#13;       The <CODE
CLASS="parameter"
>flags</CODE
> parameter is used to control the amount of
       information that is returned. It may be any combination of the following 
       constants with the bitwise OR operator (|). The DBX_COLNAMES_* flags 
       override the dbx.colnames_case setting from <TT
CLASS="filename"
>php.ini</TT
>.
       <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>DBX_RESULT_INDEX</B
></TT
></DT
><DD
><P
>&#13;           It is <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>always</I
></SPAN
> set, that is, the returned object 
           has a <SPAN
CLASS="property"
>data</SPAN
> property which is a 2 dimensional
           array indexed numerically. For example, in the expression 
           <TT
CLASS="literal"
>data[2][3]</TT
> <TT
CLASS="literal"
>2</TT
> stands for the row
           (or record) number and <TT
CLASS="literal"
>3</TT
> stands for the column 
           (or field) number. The first row and column are indexed at 0.
          </P
><P
>&#13;           If <TT
CLASS="constant"
><B
>DBX_RESULT_ASSOC</B
></TT
> is also specified, the 
           returning object contains the information related to 
           <TT
CLASS="constant"
><B
>DBX_RESULT_INFO</B
></TT
> too, even if it was not specified. 
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_RESULT_INFO</B
></TT
></DT
><DD
><P
>&#13;           It provides info about columns, such as field names and field types.
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_RESULT_ASSOC</B
></TT
></DT
><DD
><P
>&#13;           It effects that the field values can be accessed with the respective 
           column names used as keys to the returned object's 
           <SPAN
CLASS="property"
>data</SPAN
> property.
          </P
><P
>&#13;           Associated results are actually references to the numerically indexed 
           data, so modifying <TT
CLASS="literal"
>data[0][0]</TT
> causes that
           <TT
CLASS="literal"
>data[0]['field_name_for_first_column']</TT
> is modified
           as well.
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_RESULT_UNBUFFERED</B
></TT
> (PHP 5)</DT
><DD
><P
>&#13;           This flag will not create the <SPAN
CLASS="property"
>data</SPAN
> property, and 
           the <SPAN
CLASS="property"
>rows</SPAN
> property will initially be 0. Use this 
           flag for large datasets, and use <A
HREF="function.dbx-fetch-row.html"
><B
CLASS="function"
>dbx_fetch_row()</B
></A
> to
           retrieve the results row by row.
          </P
><P
>&#13;           The <A
HREF="function.dbx-fetch-row.html"
><B
CLASS="function"
>dbx_fetch_row()</B
></A
> function will return rows that
           are conformant to the flags set with this query. Incidentally, it will
           also update the <SPAN
CLASS="property"
>rows</SPAN
> each time it is called.
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_COLNAMES_UNCHANGED</B
></TT
> (available from PHP 4.3.0)</DT
><DD
><P
>&#13;           The case of the returned column names will not be changed.
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_COLNAMES_UPPERCASE</B
></TT
> (available from PHP 4.3.0)</DT
><DD
><P
>&#13;           The case of the returned column names will be changed to 
           uppercase.
          </P
></DD
><DT
><TT
CLASS="constant"
><B
>DBX_COLNAMES_LOWERCASE</B
></TT
> (available from PHP 4.3.0)</DT
><DD
><P
>&#13;           The case of the returned column names will be changed to 
           lowercase.
          </P
></DD
></DL
></DIV
>
       Note that <TT
CLASS="constant"
><B
>DBX_RESULT_INDEX</B
></TT
> is always used, regardless 
       of the actual value of <CODE
CLASS="parameter"
>flags</CODE
> parameter. This means 
       that only the following combinations are effective:
       <P
></P
><UL
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_RESULT_INDEX</B
></TT
>
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_RESULT_INDEX</B
></TT
> |
          <TT
CLASS="constant"
><B
>DBX_RESULT_INFO</B
></TT
>
         </P
></LI
><LI
><P
>&#13;          <TT
CLASS="constant"
><B
>DBX_RESULT_INDEX</B
></TT
> |
          <TT
CLASS="constant"
><B
>DBX_RESULT_INFO</B
></TT
> |
          <TT
CLASS="constant"
><B
>DBX_RESULT_ASSOC</B
></TT
> - this is the default, if 
          <CODE
CLASS="parameter"
>flags</CODE
> is not specified.
         </P
></LI
></UL
>
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35655"
></A
><H2
>返回值</H2
><P
>&#13;   <B
CLASS="function"
>dbx_query()</B
> returns an object or <TT
CLASS="literal"
>1</TT
> 
   on success, and <TT
CLASS="literal"
>0</TT
> on failure. The result object is 
   returned only if the query given in <CODE
CLASS="parameter"
>sql_statement</CODE
>
   produces a result set (i.e. a SELECT query, even if the result set is
   empty). 
  </P
><P
>&#13;   The returned <CODE
CLASS="varname"
>object</CODE
> has four or five
   properties depending on <CODE
CLASS="parameter"
>flags</CODE
>:
   <P
></P
><DIV
CLASS="variablelist"
><DL
><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="AEN35671"
></A
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT id FROM table"</font><font color="#007700">);<br /></font><font color="#0000BB">mysql_field_len</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">handle</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
></P
></DIV
>
      </P
></DD
><DT
><SPAN
CLASS="property"
>cols</SPAN
> and <SPAN
CLASS="property"
>rows</SPAN
></DT
><DD
><P
>&#13;       These contain the number of columns (or fields) and rows (or records)
       respectively.
       <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN35679"
></A
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">'SELECT id FROM table'</font><font color="#007700">);<br />echo </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">rows</font><font color="#007700">; </font><font color="#FF8000">// number of records<br /></font><font color="#007700">echo </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">cols</font><font color="#007700">; </font><font color="#FF8000">// number of fields <br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
></P
></DIV
>
      </P
></DD
><DT
><SPAN
CLASS="property"
>info</SPAN
> (optional)</DT
><DD
><P
>&#13;       It is returned only if either <TT
CLASS="constant"
><B
>DBX_RESULT_INFO</B
></TT
> or
       <TT
CLASS="constant"
><B
>DBX_RESULT_ASSOC</B
></TT
> is specified in the
       <CODE
CLASS="parameter"
>flags</CODE
> parameter. It is a 2 dimensional array,
       that has two named rows (<TT
CLASS="literal"
>name</TT
> and 
       <TT
CLASS="literal"
>type</TT
>) to retrieve column information.
      </P
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN35691"
></A
><P
><B
>例 1. lists each field's name and type</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">'SELECT id FROM table'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">DBX_RESULT_INDEX </font><font color="#007700">| </font><font color="#0000BB">DBX_RESULT_INFO</font><font color="#007700">);<br /><br />for (</font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$i </font><font color="#007700">&lt; </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">cols</font><font color="#007700">; </font><font color="#0000BB">$i</font><font color="#007700">++ ) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">info</font><font color="#007700">[</font><font color="#DD0000">'name'</font><font color="#007700">][</font><font color="#0000BB">$i</font><font color="#007700">] . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">info</font><font color="#007700">[</font><font color="#DD0000">'type'</font><font color="#007700">][</font><font color="#0000BB">$i</font><font color="#007700">] . </font><font color="#DD0000">"\n"</font><font color="#007700">;&nbsp;&nbsp;<br />}<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></DD
><DT
><SPAN
CLASS="property"
>data</SPAN
></DT
><DD
><P
>&#13;       This property contains the actual resulting data, possibly associated 
       with column names as well depending on <CODE
CLASS="parameter"
>flags</CODE
>.
       If <TT
CLASS="constant"
><B
>DBX_RESULT_ASSOC</B
></TT
> is set, it is possible to use
       <TT
CLASS="literal"
>$result-&#62;data[2]["field_name"]</TT
>.
      </P
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN35702"
></A
><P
><B
>例 2. outputs the content of data property into HTML table</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">'SELECT id, parentid, description FROM table'</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"&lt;table&gt;\n"</font><font color="#007700">;<br />foreach (</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">data </font><font color="#007700">as </font><font color="#0000BB">$row</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;tr&gt;\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;foreach (</font><font color="#0000BB">$row </font><font color="#007700">as </font><font color="#0000BB">$field</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;td&gt;$field&lt;/td&gt;"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;/tr&gt;\n"</font><font color="#007700">;<br />}<br />echo </font><font color="#DD0000">"&lt;/table&gt;\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN35705"
></A
><P
><B
>例 3. How to handle UNBUFFERED queries</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query </font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">'SELECT id, parentid, description FROM table'</font><font color="#007700">, </font><font color="#0000BB">DBX_RESULT_UNBUFFERED</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"&lt;table&gt;\n"</font><font color="#007700">;<br />while (</font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">dbx_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;tr&gt;\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;foreach (</font><font color="#0000BB">$row </font><font color="#007700">as </font><font color="#0000BB">$field</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;td&gt;$field&lt;/td&gt;"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"&lt;/tr&gt;\n"</font><font color="#007700">;<br />}<br />echo </font><font color="#DD0000">"&lt;/table&gt;\n"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35708"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN35711"
></A
><P
><B
>例 4. How to handle the returned value</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link&nbsp;&nbsp;&nbsp;</font><font color="#007700">= </font><font color="#0000BB">dbx_connect</font><font color="#007700">(</font><font color="#0000BB">DBX_ODBC</font><font color="#007700">, </font><font color="#DD0000">""</font><font color="#007700">, </font><font color="#DD0000">"db"</font><font color="#007700">, </font><font color="#DD0000">"username"</font><font color="#007700">, </font><font color="#DD0000">"password"</font><font color="#007700">)<br />&nbsp;&nbsp;&nbsp;&nbsp;or die(</font><font color="#DD0000">"Could not connect"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">dbx_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">'SELECT id, parentid, description FROM table'</font><font color="#007700">);<br /><br />if (</font><font color="#0000BB">is_object</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">) ) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// ... do some stuff here, see detailed examples below ...<br />&nbsp;&nbsp;&nbsp;&nbsp;// first, print out field names and types <br />&nbsp;&nbsp;&nbsp;&nbsp;// then, draw a table filled with the returned field values<br /></font><font color="#007700">} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;exit(</font><font color="#DD0000">"Query failed"</font><font color="#007700">);<br />}<br /><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="AEN35714"
></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
><P
>&#13;    Column names for queries on an Oracle database are returned in lowercase.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN35719"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.dbx-escape-string.html"
><B
CLASS="function"
>dbx_escape_string()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.dbx-fetch-row.html"
><B
CLASS="function"
>dbx_fetch_row()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.dbx-connect.html"
><B
CLASS="function"
>dbx_connect()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
  </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="function.dbx-fetch-row.html"
ACCESSKEY="P"
>上一页</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>起始页</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.dbx-sort.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>dbx_fetch_row</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.dbx.html"
ACCESSKEY="U"
>上一级</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>dbx_sort</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>