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HomeBackend DevelopmentPHP TutorialPHP中使用cURL实现Get和Post请求的方法_php技巧

1.cURL介绍

  cURL 是一个利用URL语法规定来传输文件和数据的工具,支持很多协议,如HTTP、FTP、TELNET等。最爽的是,PHP也支持 cURL 库。本文将介绍 cURL 的一些高级特性,以及在PHP中如何运用它。

2.基本结构

  在学习更为复杂的功能之前,先来看一下在PHP中建立cURL请求的基本步骤:

  (1)初始化


    curl_init()

  (2)设置变量


    curl_setopt() 。最为重要,一切玄妙均在此。有一长串cURL参数可供设置,它们能指定URL请求的各个细节。要一次性全部看完并理解可能比较困难,所以今天我们只试一下那些更常用也更有用的选项。

  (3)执行并获取结果


    curl_exec()

  (4)释放cURL句柄


    curl_close()

3.cURL实现Get和Post

3.1 Get方式实现

复制代码 代码如下:

  //初始化
  $ch = curl_init();

  //设置选项,包括URL
  curl_setopt($ch, CURLOPT_URL, "http://www.jb51.net");
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HEADER, 0);

  //执行并获取HTML文档内容
  $output = curl_exec($ch);

  //释放curl句柄
  curl_close($ch);

  //打印获得的数据
  print_r($output);


3.2 Post方式实现
复制代码 代码如下:

   $url = "http://localhost/web_services.php";
  $post_data = array ("username" => "bob","key" => "12345");

  $ch = curl_init();

  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  // post数据
  curl_setopt($ch, CURLOPT_POST, 1);
  // post的变量
  curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);

  $output = curl_exec($ch);
  curl_close($ch);

  //打印获得的数据
  print_r($output);

  


  以上方式获取到的数据是json格式的,使用json_decode函数解释成数组。

  $output_array = json_decode($output,true);

  如果使用json_decode($output)解析的话,将会得到object类型的数据。

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