PHP 获取请求头信息

<?php
 function em_getallheaders()
{
   foreach ($_SERVER as $name => $value)
   {
       if (substr($name, 0, 5) == 'HTTP_')
       {
           $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
       }
   }
   return $headers;
}
var_dump(em_getallheaders());

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