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><H1
><A
NAME="function.sesam-fetch-row"
></A
>sesam_fetch_row</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN206788"
></A
><P
> (PHP 3 CVS only)</P
>sesam_fetch_row -- Fetch one row as an array</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN206791"
></A
><H2
>说明</H2
>array <B
CLASS="methodname"
>sesam_fetch_row</B
> ( string result_id [, int whence [, int offset]] )<BR
></BR
><P
> Fetches one row of data from the result associated with the specified
result identifier. The row is returned as an array (indexed by values
between <TT
CLASS="literal"
>0</TT
> and <TT
CLASS="literal"
>$array["count"]-1</TT
>).
Fields may be empty, so you must check for the existence of a field by
using the <A
HREF="function.isset.html"
><B
CLASS="function"
>isset()</B
></A
> function. The type of the returned
fields depend on the respective SQL type declared for its column (see
<A
HREF="ref.sesam.html"
>SESAM overview</A
> for the conversions
applied). SESAM "multiple fields" are "inlined" and treated like a
sequence of columns.
</P
><P
> The number of columns in the result set is returned in an associative
array element $array["count"]. Because some of the result columns may be
empty, the <A
HREF="function.count.html"
><B
CLASS="function"
>count()</B
></A
> function can not be used on the
result row returned by <B
CLASS="function"
>sesam_fetch_row()</B
>.
</P
><P
> Subsequent calls to <B
CLASS="function"
>sesam_fetch_row()</B
> would return the
next (or prior, or n'th next/prior, depending on the scroll attributes)
row in the result set, or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if there are no more rows.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN206816"
></A
><H2
>参数</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>result_id</CODE
></DT
><DD
><P
> A valid result id returned by <A
HREF="function.sesam-query.html"
><B
CLASS="function"
>sesam_query()</B
></A
>.
</P
></DD
><DT
><CODE
CLASS="parameter"
>whence</CODE
></DT
><DD
><P
> <CODE
CLASS="parameter"
>whence</CODE
> is an optional
parameter for a fetch operation on "scrollable" cursors, which
can be set to the following predefined constants:
<DIV
CLASS="table"
><A
NAME="AEN206832"
></A
><P
><B
>表 1. Valid values for <CODE
CLASS="parameter"
>"whence"</CODE
> parameter</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Value</TH
><TH
>Constant</TH
><TH
>Meaning</TH
></TR
></THEAD
><TBODY
><TR
><TD
>0</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_NEXT</B
></TT
></TD
><TD
> read sequentially (after fetch, the internal default is set
to <TT
CLASS="constant"
><B
>SESAM_SEEK_NEXT</B
></TT
>)
</TD
></TR
><TR
><TD
>1</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_PRIOR</B
></TT
></TD
><TD
> read sequentially backwards (after fetch, the internal
default is set to <TT
CLASS="constant"
><B
>SESAM_SEEK_PRIOR</B
></TT
>)
</TD
></TR
><TR
><TD
>2</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_FIRST</B
></TT
></TD
><TD
> rewind to first row (after fetch, the default is set to
<TT
CLASS="constant"
><B
>SESAM_SEEK_NEXT</B
></TT
>)
</TD
></TR
><TR
><TD
>3</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_LAST</B
></TT
></TD
><TD
> seek to last row (after fetch, the default is set to
<TT
CLASS="constant"
><B
>SESAM_SEEK_PRIOR</B
></TT
>)
</TD
></TR
><TR
><TD
>4</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_ABSOLUTE</B
></TT
></TD
><TD
> seek to absolute row number given as
<CODE
CLASS="parameter"
>offset</CODE
> (Zero-based. After fetch, the
internal default is set to
<TT
CLASS="constant"
><B
>SESAM_SEEK_ABSOLUTE</B
></TT
>, and the internal
offset value is auto-incremented)
</TD
></TR
><TR
><TD
>5</TD
><TD
><TT
CLASS="constant"
><B
>SESAM_SEEK_RELATIVE</B
></TT
></TD
><TD
> seek relative to current scroll position, where
<CODE
CLASS="parameter"
>offset</CODE
> can be a positive or negative
offset value.
</TD
></TR
></TBODY
></TABLE
></DIV
>
This parameter is only valid for "scrollable" cursors.
</P
><P
> When using "scrollable" cursors, the cursor can be freely positioned
on the result set. If the <CODE
CLASS="parameter"
>whence</CODE
> parameter is
omitted, the global default values for the scrolling type (initialized
to: <TT
CLASS="constant"
><B
>SESAM_SEEK_NEXT</B
></TT
>, and settable by
<A
HREF="function.sesam-seek-row.html"
><B
CLASS="function"
>sesam_seek_row()</B
></A
>) are used. If
<CODE
CLASS="parameter"
>whence</CODE
> is supplied, its value replaces the
global default.
</P
></DD
><DT
><CODE
CLASS="parameter"
>offset</CODE
></DT
><DD
><P
> Only evaluated (and required) if <CODE
CLASS="parameter"
>whence</CODE
> is
either <TT
CLASS="constant"
><B
>SESAM_SEEK_RELATIVE</B
></TT
> or
<TT
CLASS="constant"
><B
>SESAM_SEEK_ABSOLUTE</B
></TT
>. This parameter is only
valid for "scrollable" cursors.
</P
></DD
></DL
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN206892"
></A
><H2
>返回值</H2
><P
> Returns an array that corresponds to the fetched row, or
<TT
CLASS="constant"
><B
>FALSE</B
></TT
> if there are no more rows.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN206896"
></A
><H2
>范例</H2
><TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN206898"
></A
><P
><B
>例 1. SESAM fetch rows</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">sesam_query</font><font color="#007700">(</font><font color="#DD0000">"SELECT * FROM phone\n" </font><font color="#007700">.<br /> </font><font color="#DD0000">" WHERE LASTNAME='" </font><font color="#007700">. </font><font color="#0000BB">strtoupper</font><font color="#007700">(</font><font color="#0000BB">$name</font><font color="#007700">) . </font><font color="#DD0000">"'\n" </font><font color="#007700">.<br /> </font><font color="#DD0000">" ORDER BY FIRSTNAME"</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$result</font><font color="#007700">) {<br /> </font><font color="#FF8000">/* ... error ... */<br /></font><font color="#007700">}<br /></font><font color="#FF8000">// print the table in backward order<br /></font><font color="#007700">echo </font><font color="#DD0000">"<table border=\"1\">\n"</font><font color="#007700">;<br /></font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">sesam_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">SESAM_SEEK_LAST</font><font color="#007700">);<br />while (</font><font color="#0000BB">is_array</font><font color="#007700">(</font><font color="#0000BB">$row</font><font color="#007700">)) {<br /> echo </font><font color="#DD0000">"<tr>\n"</font><font color="#007700">;<br /> for (</font><font color="#0000BB">$col </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$col </font><font color="#007700">< </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#DD0000">"count"</font><font color="#007700">]; ++</font><font color="#0000BB">$col</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"<td>" </font><font color="#007700">. </font><font color="#0000BB">htmlspecialchars</font><font color="#007700">(</font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">$col</font><font color="#007700">]) . </font><font color="#DD0000">"</td>\n"</font><font color="#007700">;<br /> }<br /> echo </font><font color="#DD0000">"</tr>\n"</font><font color="#007700">;<br /> </font><font color="#FF8000">// use implied SESAM_SEEK_PRIOR<br /> </font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">sesam_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br />echo </font><font color="#DD0000">"</table>\n"</font><font color="#007700">;<br /></font><font color="#0000BB">sesam_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN206901"
></A
><H2
>参见</H2
><P
> <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.sesam-fetch-array.html"
><B
CLASS="function"
>sesam_fetch_array()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.sesam-fetch-result.html"
><B
CLASS="function"
>sesam_fetch_result()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
</P
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