Learn how to obtain header information in PHP in two minutes

Researched the problem of custom header information in PHP all night. I have read a lot of code, but I have limited knowledge and skills. Even the test demo didn't work. I'm really ashamed. Here I see a method of obtaining header information. It’s pretty good. Let’s record it.

We can get the header data in $_SERVER. Custom data uses HTTP_ as the prefix, so the data with the HTTP_ prefix can be read out.

public function get_all_header()
  {
    // 忽略获取的header数据。这个函数后面会用到。主要是起过滤作用
    $ignore = array('host','accept','content-length','content-type');    $headers = array();   
    //这里大家有兴趣的话，可以打印一下。会出来很多的header头信息。
    //咱们想要的部分，都是‘http_'开头的。所以下面会进行过滤输出。
     /*    var_dump($_SERVER);
    exit;*/
    foreach($_SERVER as $key=>$value){      if(substr($key, 0, 5)==='HTTP_'){      
    //这里取到的都是'http_'开头的数据。
      //前去开头的前5位
        $key = substr($key, 5);        //把$key中的'_'下划线都替换为空字符串
        $key = str_replace('_', ' ', $key);        //再把$key中的空字符串替换成‘-’
        $key = str_replace(' ', '-', $key);        //把$key中的所有字符转换为小写
        $key = strtolower($key);    //这里主要是过滤上面写的$ignore数组中的数据
        if(!in_array($key, $ignore)){          $headers[$key] = $value;
        }
      }
    }//输出获取到的header
    return $headers;
  }

Reference link: http://blog.csdn.net/fdipzone/article/details/49518535

Thank you everyone for reading, I hope you will benefit a lot.

This article is reproduced from: https://blog.csdn.net/LJFPHP/article/details/78897951

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