<HTML ><HEAD ><TITLE >{eval}</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Smarty Manual" HREF="index.html"><LINK REL="UP" TITLE="Custom Functions" HREF="language.custom.functions.html"><LINK REL="PREVIOUS" TITLE="{debug}" HREF="language.function.debug.html"><LINK REL="NEXT" TITLE="{fetch}" HREF="language.function.fetch.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="sect1" 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" >Smarty Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="language.function.debug.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 8. Custom Functions</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="language.function.fetch.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="language.function.eval" ></A >{eval}</H1 ><P > <TT CLASS="varname" >{eval}</TT > is used to evaluate a variable as a template. This can be used for things like embedding template tags/variables into variables or tags/variables into config file variables. </P ><P > If you supply the <TT CLASS="parameter" ><I >assign</I ></TT > attribute, the output of the <TT CLASS="varname" >{eval}</TT > function will be assigned to this template variable instead of being output to the template. </P ><DIV CLASS="informaltable" ><A NAME="AEN2952" ></A ><P ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><THEAD ><TR ><TH WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >Attribute Name</TH ><TH WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >Type</TH ><TH WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >Required</TH ><TH WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >Default</TH ><TH WIDTH="20%" ALIGN="LEFT" VALIGN="MIDDLE" >Description</TH ></TR ></THEAD ><TBODY ><TR ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >var</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >mixed</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >Yes</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" ><SPAN CLASS="emphasis" ><I CLASS="emphasis" >n/a</I ></SPAN ></TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="MIDDLE" >Variable (or string) to evaluate</TD ></TR ><TR ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >assign</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >string</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" >No</TD ><TD WIDTH="20%" ALIGN="CENTER" VALIGN="MIDDLE" ><SPAN CLASS="emphasis" ><I CLASS="emphasis" >n/a</I ></SPAN ></TD ><TD WIDTH="20%" ALIGN="LEFT" VALIGN="MIDDLE" >The template variable the output will be assigned to</TD ></TR ></TBODY ></TABLE ><P ></P ></DIV ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Technical Note: </B > <P ></P ><UL ><LI ><P > Evaluated variables are treated the same as templates. They follow the same escapement and security features just as if they were templates. </P ></LI ><LI ><P > Evaluated variables are compiled on every invocation, the compiled versions are not saved! However if you have <A HREF="caching.html" >caching</A > enabled, the output will be cached with the rest of the template. </P ></LI ></UL > </P ></BLOCKQUOTE ></DIV ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN2990" ></A ><P ><B >Example 8-6. {eval}</B ></P ><P >The contents of the config file, <TT CLASS="filename" >setup.conf</TT >.</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="programlisting" >emphstart = <strong> emphend = </strong> title = Welcome to {$company}'s home page! ErrorCity = You must supply a {#emphstart#}city{#emphend#}. ErrorState = You must supply a {#emphstart#}state{#emphend#}.</PRE ></TD ></TR ></TABLE ><P > Where the template is: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="programlisting" >{config_load file='setup.conf'} {eval var=$foo} {eval var=#title#} {eval var=#ErrorCity#} {eval var=#ErrorState# assign='state_error'} {$state_error}</PRE ></TD ></TR ></TABLE ><P > The above template will output: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >This is the contents of foo. Welcome to Foobar Pub & Grill's home page! You must supply a <strong>city</strong>. You must supply a <strong>state</strong>.</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN2999" ></A ><P ><B >Example 8-7. Another {eval} example</B ></P ><P >This outputs the server name (in uppercase) and IP. The assigned variable <TT CLASS="parameter" ><I >$str</I ></TT > could be from a database query.</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'The server name is {$smarty.server.SERVER_NAME|upper} '<br /> </span><span style="color: #007700">.</span><span style="color: #DD0000">'at {$smarty.server.SERVER_ADDR}'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$smarty</span><span style="color: #007700">-></span><span style="color: #0000BB">assign</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">,</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></TD ></TR ></TABLE ><P > Where the template is: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="programlisting" >{eval var=$foo}</PRE ></TD ></TR ></TABLE ></DIV ></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="language.function.debug.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="language.function.fetch.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >{debug}</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="language.custom.functions.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >{fetch}</TD ></TR ></TABLE ></DIV ></BODY ></HTML >