这是非常简单的使用$_SERVER['REQUEST_METHOD'];

例子:

<?php
$method = $_SERVER['REQUEST_METHOD'];
switch ($method) {
  case 'GET':
    //Here Handle GET Request 
    break;
  case 'POST':
    //Here Handle POST Request 
    break;
  case 'DELETE':
    //Here Handle DELETE Request 
    break;
  case 'PUT':
    //Here Handle PUT Request 
    break;
}
?>

我使用了这个代码。它应该会起作用。

function get_request_method() {
    $request_method = strtolower($_SERVER['REQUEST_METHOD']);

    if($request_method != 'get' && $request_method != 'post') {
        return $request_method;
    }

    if($request_method == 'post' && isset($_POST['_method'])) {
        return strtolower($_POST['_method']);
    }

    return $request_method;
}

上面的代码将与REST调用一起工作，也将与html表单一起工作

<form method="post">
    <input name="_method" type="hidden" value="delete" />
    <input type="submit" value="Submit">
</form>

可以使用下面的代码片段检测HTTP方法或所谓的REQUEST method。

$method = $_SERVER['REQUEST_METHOD'];
if ($method == 'POST'){
    // Method is POST
} elseif ($method == 'GET'){
    // Method is GET
} elseif ($method == 'PUT'){
    // Method is PUT
} elseif ($method == 'DELETE'){
    // Method is DELETE
} else {
    // Method unknown
}

如果你更喜欢这个而不是if-else语句，你也可以使用一个开关。

如果HTML表单中需要GET或POST以外的方法，则通常使用表单中的隐藏字段来解决这个问题。

<!-- DELETE method -->
<form action='' method='POST'>
    <input type="hidden" name'_METHOD' value="DELETE">
</form>

<!-- PUT method -->
<form action='' method='POST'>
    <input type="hidden" name'_METHOD' value="PUT">
</form>

关于HTTP方法的更多信息，我想参考下面的StackOverflow问题:

HTTP协议的PUT和DELETE及其在PHP中的使用

我们还可以使用input_filter来检测请求方法，同时通过输入环境保护来提供安全性。

$request = filter_input(INPUT_SERVER, 'REQUEST_METHOD', FILTER_SANITIZE_ENCODED);

在core php中，你可以这样做:

<?php

$method = $_SERVER['REQUEST_METHOD'];

switch ($method) {
  case 'GET':
    //Here Handle GET Request
    echo 'You are using '.$method.' Method';
    break;
  case 'POST':
    //Here Handle POST Request
    echo 'You are using '.$method.' Method';
    break;
  case 'PUT':
    //Here Handle PUT Request
    echo 'You are using '.$method.' Method';
    break;
  case 'PATCH':
    //Here Handle PATCH Request
    echo 'You are using '.$method.' Method';
    break;
  case 'DELETE':
    //Here Handle DELETE Request
    echo 'You are using '.$method.' Method';
    break;
  case 'COPY':
      //Here Handle COPY Request
      echo 'You are using '.$method.' Method';
      break;

  case 'OPTIONS':
      //Here Handle OPTIONS Request
      echo 'You are using '.$method.' Method';
      break;
  case 'LINK':
      //Here Handle LINK Request
      echo 'You are using '.$method.' Method';
      break;
  case 'UNLINK':
      //Here Handle UNLINK Request
      echo 'You are using '.$method.' Method';
      break;
  case 'PURGE':
      //Here Handle PURGE Request
      echo 'You are using '.$method.' Method';
      break;
  case 'LOCK':
      //Here Handle LOCK Request
      echo 'You are using '.$method.' Method';
      break;
  case 'UNLOCK':
      //Here Handle UNLOCK Request
      echo 'You are using '.$method.' Method';
      break;
  case 'PROPFIND':
      //Here Handle PROPFIND Request
      echo 'You are using '.$method.' Method';
      break;
  case 'VIEW':
      //Here Handle VIEW Request
      echo 'You are using '.$method.' Method';
      break;
  Default:
    echo 'You are using '.$method.' Method';
  break;
}


?>

你可以使用getenv函数，而不必使用$_SERVER变量:

getenv('REQUEST_METHOD');

更多信息:

http://php.net/manual/en/function.getenv.php