REQUEST_TIME/REQUEST_TIME_FLOAT missing in INPUT_SERVER

Description

The following code:

<?php

if ( php_sapi_name() === 'cli' ) {
    echo "filter_input does not work in PHP CLI";
    exit;
}

var_dump( filter_input( INPUT_SERVER, 'REQUEST_TIME_FLOAT' ) );
var_dump( $_SERVER['REQUEST_TIME_FLOAT'] );

var_dump( filter_input( INPUT_SERVER, 'REQUEST_TIME' ) );
var_dump( $_SERVER['REQUEST_TIME'] );

Resulted in this output:

NULL
float(1737560728.0001)
NULL
int(1737560728)

But I expected this output instead:

float(1737560728.0001)
float(1737560728.0001)
int(1737560728)
int(1737560728)

These are the only 2 documented in https://www.php.net/manual/en/reserved.variables.server.php with that behavior? Is this a bug?

I only encountered this behavior with other (non-documented) variables HOME and USER

PHP Version

PHP 8.4

Operating System

No response

從 issue 中的 PHP reproducer 開始，將 filter_input(INPUT_SERVER, ...) 與 REQUEST_TIME_FLOAT 和 REQUEST_TIME 對應的 $_SERVER 值進行比較。追蹤 filter_input 的 INPUT_SERVER 進入點及其對這些變數的處理；當兩個呼叫都回傳預期輸出中顯示的文件值時，該 issue 即完成。