获取PHP中POST请求的大小 [英] Get size of POST-request in PHP

问题描述

有什么方法可以获取PHP中POST请求主体的大小?

Is there any way to get size of POST-request body in PHP?

推荐答案

很简单:

$size = (int) $_SERVER['CONTENT_LENGTH'];

请注意，仅当HTTP请求方法为POST(而非GET)时才设置$_SERVER['CONTENT_LENGTH'].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.

对于文件上传，如果要获得上传文件的总大小，则应遍历$_FILE数组以对每个$file['size']求和.由于POST数据的编码开销，确切的总大小可能与原始的Content-Length值不匹配. (还请注意，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空上传.请参见

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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