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<html><head><!- Copyright (c) Go Ahead Software Inc., 1995-2000. All Rights Reserved. -><title>websTestVar -- GoAhead WebServer API</title><link rel="stylesheet" href="../../../style/doc.css" type="text/css"></head><body><table width="550"> <tr><td><TABLE border=0 width=100% cellspacing=0 cellpadding=0 CLASS="apiTitle"> <TR> <td class="titleLeft" align=left width="33%"><b>websTestVar</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>Test to see if a Form variable is defined.</p><h2>Prototype</h2><pre> #include "webs.h" int <b>websTestVar</b>(webs_t wp, char_t *variable); </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%">variable <TD WIDTH="94%">The variable to test.</TD></TR> </table><h2>Description</h2><P>The websTestVar procedure returns TRUE if the specified variable is defined in the Form environment table. If the variable is not defined, the value of the default is returned.</P><h2>Return Value</h2><p> Returns 1 if the variable is defined, otherwise 0 is returned.</p><h2>Example</h2><pre> if (websTestVar(wp, "Wizard") { /* Running as a wizard */ } </pre><h2>Stability Classification</h2><p>Stable.</p><h2>See Also</h2><p> <A href="websExpand.htm">Standard form variables</A>, <A href="websSetVar.htm">websSetVar</A> </p></td></tr></table></body></html>⌨️ 快捷键说明
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