问题描述
有没有办法在 PHP 中获取 POST 请求正文的大小?
Is there any way to get size of POST-request body in PHP?
推荐答案
就这么简单:
$size = (int) $_SERVER['CONTENT_LENGTH'];
请注意，$_SERVER['CONTENT_LENGTH'] 仅在 HTTP 请求方法为 POST(而非 GET)时设置.这是 Content-Length 标头的原始值，如 RFC 7230.
Note that $_SERVER['CONTENT_LENGTH'] is only set when the HTTP request method is POST (not GET). This is the raw value of the Content-Length header, as specified in RFC 7230.
在文件上传的情况下，如果你想获得上传文件的总大小，你应该遍历$_FILE数组来总结每个$file['size'].由于 POST 数据的编码开销，确切的总大小可能与原始 Content-Length 值不匹配.(另请注意，您应该使用每个 $_FILES 元素的 $file['error'] 代码检查上传错误，例如 UPLOAD_ERR_PARTIAL部分上传或 UPLOAD_ERR_NO_FILE 用于空上传.请参阅 文件上传错误 PHP 手册中的文档.)
In the case of file uploads, if you want to get the total size of uploaded files, you should iterate over the $_FILE array to sum each $file['size']. The exact total size might not match the raw Content-Length value due to the encoding overhead of the POST data. (Also note you should check for upload errors using the $file['error'] code of each $_FILES element, such as UPLOAD_ERR_PARTIAL for partial uploads or UPLOAD_ERR_NO_FILE for empty uploads. See file upload errors documentation in the PHP manual.)
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