<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>maxdb_fetch_lengths</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="PHP 手册"
HREF="index.html"><LINK
REL="UP"
TITLE="MaxDB PHP Extension"
HREF="ref.maxdb.html"><LINK
REL="PREVIOUS"
TITLE="maxdb_fetch_fields"
HREF="function.maxdb-fetch-fields.html"><LINK
REL="NEXT"
TITLE="maxdb_fetch_object"
HREF="function.maxdb-fetch-object.html"><META
HTTP-EQUIV="Content-type"
CONTENT="text/html; charset=UTF-8"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PHP 手册</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="function.maxdb-fetch-fields.html"
ACCESSKEY="P"
>上一页</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="function.maxdb-fetch-object.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.maxdb-fetch-lengths"
></A
>maxdb_fetch_lengths</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN110827"
></A
><P
> (PECL)</P
>maxdb_fetch_lengths<P
> (no version information, might be only in CVS)</P
>result->lengths -- Returns the lengths of the columns of the current row in the result set</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110831"
></A
><H2
>Description</H2
><P
>Procedural style:</P
>array <B
CLASS="methodname"
>maxdb_fetch_lengths</B
> ( resource result )<BR
></BR
><P
>Object oriented style (property):</P
>class <B
CLASS="classname"
>result</B
> { <BR
></BR
>array lengths<BR
></BR
>}<P
> The <B
CLASS="function"
>maxdb_fetch_lengths()</B
> function returns an array containing the
lengths of every column of the current row within the result set represented by the
<CODE
CLASS="parameter"
>result</CODE
> parameter. If successful, a numerically indexed array
representing the lengths of each column is returned or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110851"
></A
><H2
>Return values</H2
><P
> An array of integers representing the size of each column (not including
any terminating null characters). <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if an error occurred.
</P
><P
> <B
CLASS="function"
>maxdb_fetch_lengths()</B
> is valid only for the current row of the result set.
It returns <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if you call it before calling maxdb_fetch_row/array/resource or after retrieving
all rows in the result.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110858"
></A
><H2
>Example</H2
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN110860"
></A
><P
><B
>例 1. Object oriented style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br />$maxdb </font><font color="#007700">= new </font><font color="#0000BB">maxdb</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">maxdb_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">maxdb_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT * from hotel.customer WHERE cno = 3000"</font><font color="#007700">;<br /><br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#0000BB">$query</font><font color="#007700">)) {<br /><br /> </font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">fetch_row</font><font color="#007700">();<br /><br /> </font><font color="#FF8000">/* display column lengths */<br /> </font><font color="#007700">foreach (</font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">lengths </font><font color="#007700">as </font><font color="#0000BB">$i </font><font color="#007700">=> </font><font color="#0000BB">$val</font><font color="#007700">) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Field %2d has Length %2d\n"</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">+</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">$val</font><font color="#007700">);<br /> }<br /> </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br /></font><font color="#0000BB">?></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="AEN110863"
></A
><P
><B
>例 2. Procedural style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">maxdb_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">maxdb_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">maxdb_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT * from hotel.customer WHERE cno = 3000"</font><font color="#007700">;<br /><br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">maxdb_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#0000BB">$query</font><font color="#007700">)) {<br /><br /> </font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">maxdb_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* display column lengths */<br /> </font><font color="#007700">foreach (</font><font color="#0000BB">maxdb_fetch_lengths</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">) as </font><font color="#0000BB">$i </font><font color="#007700">=> </font><font color="#0000BB">$val</font><font color="#007700">) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Field %2d has Length %2d\n"</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">+</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">$val</font><font color="#007700">);<br /> }<br /> </font><font color="#0000BB">maxdb_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">maxdb_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><P
> The above examples would produce the following output:
</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Field 1 has Length 4
Field 2 has Length 3
Field 3 has Length 5
Field 4 has Length 6
Field 5 has Length 5
Field 6 has Length 21</PRE
></TD
></TR
></TABLE
></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.maxdb-fetch-fields.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.maxdb-fetch-object.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>maxdb_fetch_fields</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.maxdb.html"
ACCESSKEY="U"
>上一级</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>maxdb_fetch_object</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
