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Home Backend Development PHP Tutorial 一个让人能绕晕的逻辑

一个让人能绕晕的逻辑

Jun 23, 2016 pm 01:33 PM

为了便于说明,我用不同的颜色自然段说明吧
这是一个关于定义数组的问题
是在一个框架中,首先在类中定义了一个整合数组的方法

/**
 * 输出模板内容的数组,其他的变量不允许从程序中直接输出到模板
 */
private static $output_value = array();
public static function output($output,$input=''){
self::getInstance();

self::$output_value[$output] = $input;
}
在实际应用中,在一个文件里,这样写的
//板块信息
$model_web_config = Model('web_config');
$web_html = $model_web_config->getWebHtml('index');
Tpl::output('web_html',$web_html);
接着在模板中这里写的

好我的问题来了:
通过上面一系列的计算获得了数组库中的数据,并把数据放在数组里了。此时在模板中的写法首先要知道这个数组叫啥名,然后通过下标配合就能获得数组中的对应值 了,这时我的疑问来了,这里为啥数组名叫$output呢?
这个名是随便起还是说有上下文的约定呢,我看了一下上文,没有这个名字的定义呢,就突然出现,所以让人目瞪口呆!何解?


我目前的理解:也许有人会说是这句Tpl::output('web_html',$web_html);话中的output说明了,我认为不是,因为这里它是一个方法名,而不是数组名!按说上面已经定义了/**
 * 输出模板内容的数组,其他的变量不允许从程序中直接输出到模板
 */
private static $output_value = array();,为啥这里不用$output_value做数组名,而是用$output来做数组名呢,


回复讨论(解决方案)

可能是在 Tpl::output 的函数里面定义了  $output 这个数组

看看你一直的提问,发现你并非初学者(有时问题的水平很高)
那么你怎么就不知道函数(方法)定义时的形式参数呢?
public static function output( $output, $input=''){
  self::getInstance();
  self::$output_value[ $output] =  $input;
}
output 方法的两个传入参数,你总得给他个名字吧?不然怎么知道谁是谁
总不能第一个参数、第二个参数这样叫吧

执行 Tpl::output('web_html',$web_html); 时
'web_html' 就对应 参数 $output 
$web_html就对应 参数 $input 

可能是output方法中定义了

$web_html = array('index'=>'xxx');output('web_html',$web_html);function output($key, $value){	global $output;	$output[$key] = $value;	return $output;}echo $output['web_html']['index'];
Copy after login

可能其他地方赋值了,比如:$output = $output_value;
具体要看完整的类如何写的

可能是在 Tpl::output 的函数里面定义了  $output 这个数组


我一提醒,确实里面有
//对模板变量进行赋值
$output = self::$output_value;

看看你一直的提问,发现你并非初学者(有时问题的水平很高)
那么你怎么就不知道函数(方法)定义时的形式参数呢?
public static function output( $output, $input=''){
  self::getInstance();
  self::$output_value[ $output] =  $input;
}
output 方法的两个传入参数,你总得给他个名字吧?不然怎么知道谁是谁
总不能第一个参数、第二个参数这样叫吧

执行 Tpl::output('web_html',$web_html); 时
'web_html' 就对应 参数 $output 
$web_html就对应 参数 $input 


你没有看明白我在问啥,跑题了
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