是否保证$ _SERVER ['REQUEST_METHOD']为大写? [英] Is $_SERVER['REQUEST_METHOD'] guaranteed to be uppercase?

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我当前在代码中输入了strtoupper($_SERVER['REQUEST_METHOD']).

I've currently got strtoupper($_SERVER['REQUEST_METHOD']) in my code.

但是strtoupper调用是否必要?可以保证$_SERVER['REQUEST_METHOD']已经是大写吗?

But is the strtoupper call necessary? Is $_SERVER['REQUEST_METHOD'] guaranteed to be uppercase already?

RFC 3875 定义REQUEST_METHOD变量为大写，因此可以依靠它.

RFC 3875 defines the REQUEST_METHOD variable as upper case, so it's okay to rely on it.

必须将REQUEST_METHOD元变量设置为以下方法脚本应使用它来处理请求...

The REQUEST_METHOD meta-variable MUST be set to the method which should be used by the script to process the request ...

  REQUEST_METHOD   = method
  method           = "GET" | "POST" | "HEAD" | extension-method
  extension-method = "PUT" | "DELETE" | token

该方法区分大小写.

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是否保证$ _SERVER ['REQUEST_METHOD']为大写? [英] Is $_SERVER[&#39;REQUEST_METHOD&#39;] guaranteed to be uppercase?