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php function 有什么好处?解决方案

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Release: 2016-06-13 12:58:56
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php function 有什么好处?
PHP function 到底有什么好处? 可以自动清除数组,清除变量,清除MEMORY吗?


<br />
$array = array('http://www.google.com.hk','http://www.baidu.com','http://www.1.com/','http://www.yahoo.com.cn');<br />
foreach($array as $url){<br />
    $ch = curl_init();<br />
	curl_setopt($ch, CURLOPT_URL, $url);<br />
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);<br />
	curl_setopt($ch, CURLOPT_HEADER, true);<br />
	curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)');<br />
	$html = curl_exec($ch);<br />
	curl_close($ch);<br />
	echo $html.'<hr />';<br />
	$html = NULL;<br />
        unset($html);<br />
}<br />
Copy after login


function get_html($url){<br />
	$ch = curl_init();<br />
	curl_setopt($ch, CURLOPT_URL, $url);<br />
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);<br />
	curl_setopt($ch, CURLOPT_HEADER, true);<br />
	curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)');<br />
	$html = curl_exec($ch);<br />
	curl_close($ch);<br />
	return $html;<br />
}<br />
$array = array('http://www.google.com.hk','http://www.baidu.com','http://www.1.com/','http://www.yahoo.com.cn');<br />
foreach($array as $url){<br />
    get_html($url);<br />
}
Copy after login

如果是function的话,是否也要unset数组?
还是只要return,下次执行function时会自动清空第一次执行function时的数组?


------解决方案--------------------
对于你后面的两个问题我不知道是什么意思。
其实简简单单的想,你用函数封装了功能实现,这样代码不更好看吗?
------解决方案--------------------
unset 不unset 两种方法都没关系...写成函数的方式 方便你随时调用 代码结构更清晰...

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