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HomeBackend DevelopmentPHP TutorialPHP实用函数手册:stream_context_create()模拟POST/GET

PHP实用函数手册:stream_context_create()模拟POST/GET

有时候,我们需要在服务器端模拟 POST/GET 等请求,也就是在 PHP 程序中去实现模拟,改怎么做到呢?或者说,在 PHP 程序里,给你一个数组,如何将这个数组 POST/GET 到另外一个地址呢?当然,使用 CURL 很容易办到,那么如果不使用 CURL 库,又该怎么办呢?其实,在 PHP 里已经有相关的函数实现了,这个函数就是接下来要讲的 stream_context_create()。

直接 show you the code,这是最好的方法:

$data = array(	'foo'=>'bar', 	'baz'=>'boom', 	'site'=>'www.lai18.com', 	'name'=>'lai18'); 	$data = http_build_query($data); //$postdata = http_build_query($data);$options = array(	'http' => array(		'method' => 'POST',		'header' => 'Content-type:application/x-www-form-urlencoded',		'content' => $data		//'timeout' => 60 * 60 // 超时时间(单位:s)	));$url = "http://www.lai18.net/";$context = stream_context_create($options);$result = file_get_contents($url, false, $context);echo $result;


http://www.lai18.com 的代码为:

$data = $_POST;echo '<pre class="brush:php;toolbar:false">';print_r( $data );echo '
';



运行结果为:

Array(    [foo] => bar    [baz] => boom    [site] => www.lai18.com    [name] => lai18)



一些要点讲解(参考:http://www.lai18.com/content/425476.html):

1. 以上程序用到了 http_build_query() 函数,如果需要了解,可以参看 stream),也可用于文件系统(file system)。对于像 file_get_contents、file_put_contents、readfile直接使用文件名操作而没有文件句柄的函数来说更有用。stream_context_create增加header头只是一部份功能,还可以定义代理、超时等。这使得访问web的功能不弱于curl。

4. stream_context_create() 作用:创建并返回一个文本数据流并应用各种选项,可用于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。

5. stream_context_create 还能通过增加 timeout 选项解决file_get_contents超时处理:

$opts = array(    'http'=>array(    'method'=>"GET",    'timeout'=>60,  ));//创建数据流上下文$context = stream_context_create($opts);$html =file_get_contents('http://www.lai18.com', false, $context);//fopen输出文件指针处的所有剩余数据://fpassthru($fp); //fclose()前使用

延伸阅读

此文章所在专题列表如下:

1PHP函数补完:get_magic_quotes_gpc()

2PHP函数补完:error_reporting()

3PHP函数补完:array_splice()

4PHP函数补完:isset()

5PHP函数补完:array_multisort()

6PHP函数补完:urlencode()

7PHP函数补完:preg_match()

8PHP函数补完:header()

9PHP函数补完:getenv()

10PHP函数补完:list()

11PHP函数补完:mysql_num_rows()

12PHP函数补完:explode()

13PHP函数补完:mysql_fetch_array()

14PHP函数补完:number_format()

15PHP函数补完:mysql_query()

16PHP函数补完:empty()

17PHP函数补完:call_user_func()

18PHP函数补完:parse_url()

19PHP函数补完:import_request_variables()

20PHP函数补完:ImageCopyResamples()

21PHP函数补完:移除HTML标签strip_tags()

22PHP函数补完:输出数组结构与内容var_dump()

23PHP函数补完:var_export()

24PHP函数补完:判断变量是否为数字is_numeric()

25PHP函数补完:http_build_query()构造URL字符串

26PHP实用函数手册:stream_context_create()模拟POST/GET

27PHP函数补完:shuffle()取数组若干个随机元素

28PHP函数补完:session_id()

29PHP函数补完:nl2br()与nl2p()函数

30PHP函数补完:session_name()

31php计划任务之ignore_user_abort函数实现方法

32PHP中error_log()函数的使用方法

33PHP实用函数-array_change_key_case()将数组的键转换大小写

34PHP实用函数-function_exists()检测函数是否已定义

35PHP实用函数-array_intersect()计算两个或多个数组的交集

36PHP实用函数-array_diff()计算数组间的差集

37PHP实用函数-compact()将已知变量转换成数组

38PHP实用函数-extract()将数组转换成对应键值对变量

39PHP实用函数-array_count_values()统计数组中元素出现的次数

40PHP实用函数-getopt()从命令行参数列表中获取选项

41PHP实用函数 String函数分类

42使用PHP自带的filter函数进行数据校验


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