smarty中assign()这个函数是如何定义的
谁能帖出这个函数的代码啊，以及它的原理
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smarty_internal_data.php
/**<br> * assigns a Smarty variable<br> *<br> * @param array<br><font color="#FF8000">------解决方案--------------------</font><br>string $tpl_var the template variable name(s)<br> * @param mixed $value the value to assign<br> * @param boolean $nocache if true any output of this variable will be not cached<br> * @param boolean $scope the scope the variable will have (local,parent or root)<br> */<br> public function assign($tpl_var, $value = null, $nocache = false)<br> {<br> if (is_array($tpl_var)) {<br> foreach ($tpl_var as $_key => $_val) {<br> if ($_key != '') {<br> if (isset($this->tpl_vars[$_key])) {<br> $this->tpl_vars[$_key]->value = $_val;<br> $this->tpl_vars[$_key]->nocache = $nocache;<br> } else {<br> $this->tpl_vars[$_key] = new Smarty_variable($_val, $nocache);<br> }<br> }<br> }<br> } else {<br> if ($tpl_var != '') {<br> if (isset($this->tpl_vars[$tpl_var])) {<br> $this->tpl_vars[$tpl_var]->value = $value;<br> $this->tpl_vars[$tpl_var]->nocache = $nocache;<br> } else {<br> $this->tpl_vars[$tpl_var] = new Smarty_variable($value, $nocache);<br> }<br> }<br> }<br> }<br>
