Identical to calling fopen(), fwrite(), and fclose() successively. The function returns the amount of bytes that were written to the file.
flags can take FILE_USE_INCLUDE_PATH and/or FILE_APPEND, however the FILE_USE_INCLUDE_PATH option should be used with caution.
備注:這個函數可安全的使用於二進位。
心得: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附錄 L支援URL協定的列表。
See also fopen(), fwrite(), fclose(), and file_get_contents().