php使用Smarty的相关注意事项及访问变量的几种方式
$tpl=new Smarty();//新建一个smarty对象,我使用的是Smarty-3.1.6版本
1.设置smarty模板路径$tpl->setTemplateDir();默认情况下是templates
2.设置smarty模板编译路径$tpl->setCompileDir();默认情况下是templates_c
3.设置smarty模板引擎的左右 分隔符,
$tpl->left_delimiter="
$tpl->right_delimiter="}>";
默认情况下:public $left_delimiter = "{";//smarty源代码
public $right_delimiter = "}";//smarty源代码
为什么我们要改这些分隔符?
因为比如在较早版本smarty引擎模板中,会报错,不能自动识别。
比如:
或者 javascript中
复制代码 代码如下:
<script> <BR>function show(){ <BR>alert("smarty"); <BR>} <BR></script>
这两种情况下,都有“左右大括号”,smarty引擎碰到会报错
4.初始化操作我们可以在外部另外创建一个初始化操作的php文件,如:smarty.ini.php。然后在php文件中包括进来即可
复制代码 代码如下:
include "../Smarty3.1.6/libs/Smarty.class.php";
$tpl=new Smarty();
$tpl->setTemplateDir("./Tpl");
$tpl->setTemplateDir("./Compile");
$tpl->left_delimiter="$tpl->right_delimiter="}>";
?>
5.使用smarty模板引擎的display函数或者include其他模板时,都得以smarty对象中指定的模板目录(比如:Tpl目录,默认是templates目录)为基目录。
①模板目录是:Tpl,该目录下存放着很多模板,有default,green,red模板,default模板目录下有很多模板文件(index.tpl、header.tpl、footer.tpl),此时display的正确用法:$tpl->display(“default/index.tpl”);即基目录下的default模板目录
②在模板文件(如:index.tpl)中包含其他模板文件时(如:header.tpl、footer.tpl),include的正确写法应该是: 、
虽然index.tpl、header.tpl、footer.tpl都在同一个目录下,但是 、是错误的写法,这种情况,smarty引擎会到Tpl目录下找header和footer,而不是在default下面查找
6.如果要想让各个目录下的PHP程序都可以加载Smarty和使用Smarty指定的模板目录和编译目录,唯一的办法是使用绝对路径。
7.Smarty模板引擎中访问变量的方式(模板中的变量前记得加”$”符号)
①访问数组
索引数组:
$tpl->assign("arr",array("aa","bb","cc"));
$tpl->assign("arr2",array(array("二维数组一一","二维数组一二"),array("二维数组二一","二维数组二二")));
访问索引数组:、、
访问二维索引数组:、
关联数组:(使用 . 符号来访问)
访问关联数组:、、
②访问对象
创建对象:
复制代码 代码如下:
class human{
private $sex;
private $name;
private $age;
public function __construct($s,$n,$a){
$this->sex=$s;
$this->name=$n;
$this->age=$a;
}
public function print_info(){
return $this->sex."--".$this->name."--".$this->age;
}
}
$tpl->assign("student",new human("male","MarcoFly",22));
给模板中的对象赋值:print_info()}>
8.Smarty模板引擎中的数学运算可以应用到模板变量中
给变量赋值
$tpl->assign("num1",10);
$tpl->assign("num2",5.5);
模板变量输出
//结果10
//结果5.5
//结果15.5
//结果13.025
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