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 /**
* assigns a smarty variable
*
* @param array
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string $tpl_var the template variable name(s)
* @param mixed $value the value to assign
* @param boolean $nocache if true any output of this variable will be not cached
* @param boolean $scope the scope the variable will have (local,parent or root)
*/
public function assign($tpl_var, $value = null, $nocache = false)
{
if (is_array($tpl_var)) {
foreach ($tpl_var as $_key => $_val) {
if ($_key != '') {
if (isset($this->tpl_vars[$_key])) {
$this->tpl_vars[$_key]->value = $_val;
$this->tpl_vars[$_key]->nocache = $nocache;
} else {
$this->tpl_vars[$_key] = new smarty_variable($_val, $nocache);
}
}
}
} else {
if ($tpl_var != '') {
if (isset($this->tpl_vars[$tpl_var])) {
$this->tpl_vars[$tpl_var]->value = $value;
$this->tpl_vars[$tpl_var]->nocache = $nocache;
} else {
$this->tpl_vars[$tpl_var] = new smarty_variable($value, $nocache);
}
}
}
}