websgetvar.htm

来自「Writing Efficient C for ARM 基于ARM内核微处」· HTM 代码 · 共 32 行

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<!- Copyright (c) Go Ahead Software Inc., 1995-2000. All Rights Reserved. ->
<title>websGetVar -- GoAhead WebServer API</title>
<link rel="stylesheet" href="../../../style/doc.css" type="text/css">
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<TABLE border=0 width=100% cellspacing=0 cellpadding=0 CLASS="apiTitle"> <TR> 
<td class="titleLeft" align=left width="33%"><b>websGetVar</b></TD><td class="titleCenter" align=center width="33%"><b> 
GoAhead WebServer API</b></TD><td class="titleRight" align=right width="33%"><B> 
GoAhead EMF</B></TD></TR> </TABLE><HR> <h2>Synopsis</h2><p>Return the value of 
a Form variable.</p><h2>Prototype</h2><pre> #include &quot;webs.h&quot; 

 char_t *<b>websGetVar</b>(webs_t wp, char_t *var, char_t *default); </pre><h2>Parameters</h2><table width=100% BORDER="0" CELLPADDING="0" CELLSPACING="0"> 
<TR> <TD VALIGN="TOP" WIDTH="6%">wp <TD WIDTH="94%">Web server connection handle.</TD></TR> 
<TR> <TD VALIGN="TOP" WIDTH="6%">var <TD WIDTH="94%">The form variable to be returned.</TD></TR> 
<TR> <TD VALIGN="TOP" WIDTH="6%">default <TD WIDTH="94%">The variable to be returned 
if none is defined in var.</TD></TR> </table><h2>Description</h2><P>The websGetVar 
procedure looks up <i>var</i> in the Form table of variables. If the variable 
is not defined, the value of the default is returned. If default is NULL and the 
variable is not found, NULL will be returned. Form variables are created for each 
&lt;input&gt; form tag. The <A href="websExpand.htm">standard form variables</A> 
are also defined.</P><h2>Return Value</h2><p> Returns a pointer to a statically 
allocated string. Do not call <A href="../basicapi/bfree.htm">bfree</A>.</p><h2>Example</h2><pre> 
name = websGetVar(wp, &quot;Name&quot;, &quot;Peter Smith&quot;); </pre><h2>Stability 
Classification</h2><p>Stable.</p><h2>See Also</h2><p> <A href="websSetVar.htm">websSetVar</A>, 
<A href="websTestVar.htm">websTestVar</A> </p></td></tr></table>
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websgetvar.htm - 源码说明

本页面展示了「Writing Efficient C for ARM 基于ARM内核微处理器操作系统的移植 基于ARM的嵌入式开发(PDF ARM中国) ARM+DSP+CPLD开发板 s3」中的 websgetvar.htm 源码文件，采用 HTM 编程语言编写，共 32 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

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