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Homephp教程php手册PHP stream_context_create()函数的使用示例,createfile函数

PHP stream_context_create()函数的使用示例,createfile函数

stream_context_create()函数是用来 创建打开文件的上下文件选项 ,用于fopen(),file_get_contents()等过程的超时设置、代理服务器、请求方式、头信息设置的特殊过程。

比如说,上篇php教程中gd库实现下载网页所有图片中,第10行:

利用了stream_context_create()设置代理服务器:
复制代码 代码如下:
//设置代理服务器
$opts = array('http'=>array('request_fulluri'=>true));
$context = stream_context_create($opts);
$content = file_get_contents($url,false,$context);

利用了stream_context_create()设置超时时间:
复制代码 代码如下:
 $opts = array(
    'http'=>array(
    'method'=>"GET",
    'timeout'=>60,
  )
);
$context = stream_context_create($opts);
$html =file_get_contents('http://www.bkjia.com', false, $context);

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