(PHP 4, PHP 5)
readfile — Outputs a file
Reads a file and writes it to the output buffer.
The filename being read.
You can use the optional second parameter and set it to TRUE, if you want to search for the file in the include_path, too.
A context stream resource.
Returns the number of bytes read from the file. If an error occurs, FALSE is returned and unless the function was called as @readfile(), an error message is printed.
如果 fopen wrappers 已啟動,則可藉此函數把檔名當成URL使用。參考 fopen() 有更多關於如何指定檔名的細節和List of Supported Protocols/Wrappers支援URL協定的列表。
Note: Context support was added with PHP 5.0.0. For a description of contexts, refer to Streams.