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php中请求url有哪些方法

零下一度

零下一度

发布时间:2017-07-16 16:39:37

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4109人浏览过

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来源于php中文网

原创

php中打开url地址的几种方法总结,这里的函数主要用于小偷采集等函数。

1: 用file_get_contents 

以get方式获取内容 

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示例代码2: 用fopen打开url, 

以get方式获取内容 

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示例代码3:用file_get_contents函数,以post方式获取url  

 
'bar'); 
$data = http_build_query($data); 
$opts = array ( 
'http' 
=> array ( 
'method' => 'POST', 
'header'=> "Content-type: 
application/x-www-form-urlencoded" . 
"Content-Length: " . strlen($data) . 
"", 
'content' => $data 
), 
); 
$context = 
stream_context_create($opts); 
$html = 
file_get_contents('localhost/e/admin/test.html', false, $context); 
 
echo $html; 
?>

示例代码4:用fsockopen函数打开url,以get方式获取完整的数据,包括header和body  

最近开发中遇到一个问题,程序第4行会请求一个url,通过查找相关的资料发现有多种方法,本文给大家介绍了关于php中请求url的五种方法,分别是用fopen()函数、file()函数、file_get_contents()函数、curl() 请求远程url数据和exec() 执行命令行命令

本文主要给大家介绍了关于php中请求url的五种方法,分享出来供大家参考学习,下面话不多说,来一起看看详细的介绍:

五种方法:

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下载
  • 前三种都是php基本的文件操作函数

  • curl()是php扩展需要开启,linux下需要安装

  • exec()执行的是linux命令行下的命令wget下载远程文件

其中wget命令在本地虚机测试请求www.baidu.com时,没有成功,在远程服务器上却可以,考虑时DNS解析的问题,于是直接请求IP成功下载了index.html的文件。

这里只提供了方法,其中的优缺点需要详细了解每一个方法的功能和缺陷。

一、fopen()函数

$file = fopen("www.jb51.net", "r") or die("打开远程文件失败!");
while (!feof($file)) {
 $line = fgets($file, 1024);
 //使用正则匹配标题标记
 if (preg_match("/(.*)<\/title>/i", $line, $out)) { 
 $title = $out[1]; //将标题标记中的标题字符取出
 break; //退出循环,结束远程文件读取
 }
}
fclose($file);</pre><p><span style="color: #ff0000"><strong>二、file()函数</strong></span></p>
<p class="jb51code"><br></p><pre class="brush:php;toolbar:false">$lines = file("www.jb51.net/article/48866.htm");
readfile(www.jb51.net/article/48866.htm);</pre><p><span style="color: #ff0000"><strong>三、file_get_contents()函数</strong></span></p>
<p class="jb51code"><br></p><pre class="brush:php;toolbar:false">$content = file_get_contents(www.jb51.net/article/48866.htm);</pre><p><span style="color: #ff0000"><strong>四、curl() 请求远程url数据</strong></span></p>
<p class="jb51code"><br></p><pre class="brush:php;toolbar:false">$url = "www.baidu.com";
$ch = curl_init();
$timeout = 5;
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
$contents = curl_exec($ch);
curl_close($ch);</pre><p><span style="color: #ff0000"><strong>五、exec() 执行命令行命令</strong></span></p><pre class="brush:php;toolbar:false">//exec("wget 220.181.111.188");
shell_exec("wget 220.181.111.188");</pre>					</div>
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