<table summary="Header navigation table" width="100%" border="0" cellpadding="0" cellspacing="0"><tr><th colspan="3" align="center">Smarty - the compiling PHP template engine</th></tr><tr><td width="25%" align="left" valign="bottom"><a href="language.syntax.comments.html" accesskey="P">Prev</a></td> <td width="50%" align="center" valign="bottom">Chapter 3. Basic Syntax[第3章.基本语法]</td> <td width="25%" align="right" valign="bottom"><a href="language.syntax.functions.html" accesskey="N">Next</a></td></tr></table> # Variables[变量] Template variables start with the $dollar sign. They can contain numbers, letters and underscores, much like a PHP variable [http://php.net/language.variables]. You can reference arrays by index numerically or non-numerically. Also reference object properties and methods. Config file variables are an exception to the $dollar syntax and are instead referenced with surrounding #hashmarks#, or via the $smarty.config variable. 模板变量用美元符号$开始，可以包含数字、字母和下划线，这与[php变量](http://php.net/language.variables)很像。你可以引用数组的数字或非数字索引，当然也可以引用对象属性和方法。 译注 | 译注：按照说明像$abc、$abc123、$abc_123、$abc[1]、$abc['a']、$abc->a、$abc->a()这些模板变量都是有效的。 | |-----| 配置文件变量是一个不用美元符号$，而是用#号包围着变量（#hashmarks#），或者是一个$smarty.config形式的变量。 **Example 3-2. 变量** | ~~~ {* 演示server变量"SERVER_NAME"($_SERVER['SERVER_NAME']) *}{$smarty.server.SERVER_NAME}数学和嵌入标签:{$x+$y} // 输出x+y的和.{assign var=foo value=$x+$y} // 属性中的变量 {$foo[$x+3]} // 变量作为数组索引{$foo={counter}+3} // 标签里面嵌套标签{$foo="this is message {counter}"} // 引号里面使用标签定义数组:{assign var=foo value=[1,2,3]}{assign var=foo value=['y'=>'yellow','b'=>'blue']}{assign var=foo value=[1,[9,8],3]} // 可以嵌套短变量分配:{$foo=$bar+2}{$foo = strlen($bar)} // function in assignment{$foo = myfunct( ($x+$y)*3 )} // 作为函数参数 {$foo.bar=1} // 赋值给指定的数组索引{$foo.bar.baz=1} {$foo[]=1} // appending to an arraySmarty "dot" 语法 (注意: 嵌入的{}用来解决指代不明的情况):{$foo.a.b.c} => $foo['a']['b']['c'] {$foo.a.$b.c} => $foo['a'][$b]['c'] // with variable index{$foo.a.{$b+4}.c} => $foo['a'][$b+4]['c'] // 表达式作为索引{$foo.a.{$b.c}} => $foo['a'][$b['c']] // 嵌套索引PHP式语法, "dot"语法外的另一种选择:{$foo[1]} // normal access{$foo['bar']}{$foo['bar'][1]}{$foo[$x+$x]} // index may contain any expression{$foo[$bar[1]]} // nested index{$foo[section_name]} // smarty {section} access, not array access! 访问Smarty节块变量，而非访问数组可变变量:$foo // normal variable$foo_{$bar} // variable name containing other variable $foo_{$x+$y} // variable name containing expressions $foo_{$bar}_buh_{$blar} // variable name with multiple segments 用在多段变量名中{$foo_{$x}} // will output the variable $foo_1 if $x has a value of 1 注意是输出变量，而非值对象链:{$object->method1($x)->method2($y)}直接使用php函数:{time()} //译注：如果直接使用模版变量符号引用php函数，该函数应有返回值。 ~~~ | |-----| <table width="80%" border="0" cellpadding="2" cellspacing="2" class="note"><caption> 提示 </caption> <tr><td><p>Note<br/> Although Smarty can handle some very complex expressions and syntax, it is a good rule of thumb to keep the template syntax minimal and focused on presentation. If you find your template syntax getting too complex, it may be a good idea to move the bits that do not deal explicitly with presentation to PHP by way of plugins or modifiers.</p> <p>虽然Smarty能处理一些复杂的表达式和语法，但从经验上来说的，一个好的做法是最低限度使用模版语法，将其专注于表现外在内容。如果发现你的模版语法太复杂，最好将与外在表现无关的后台处理通过插件或调节器交给php处理。</p></td> </tr></table> Request variables such as $_GET, $_SESSION, etc are available via the reserved $smarty variable. See also $smarty, config variables {assign} and assign(). 确定可以经由$smarty保留变量使用$_GET、$_SESSION等php全局超级变量。 更多参考[$smarty](#)、赋值变量[{assign}](#)和[assign()](#)。 <table summary="Footer navigation table" width="100%" border="0" cellpadding="0" cellspacing="0"><tr><td width="33%" align="left" valign="top"><a href="language.syntax.comments.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.syntax.functions.html" accesskey="N">Next</a></td></tr><tr><td width="33%" align="left" valign="top">Comments<br/> 注释</td><td width="34%" align="center" valign="top"><a href="language.basic.syntax.html" accesskey="U">Up</a></td><td width="33%" align="right" valign="top">Functions<br/> 函数</td></tr></table>