23.13.1. ProblemYou want to force all buffered data to be written to a filehandle. 23.13.2. SolutionUse fflush( ), as in Example 23-35. Flushing output
Example 23-35 ensures that "There are twelve pumpkins in my house." is written to $fh. 23.13.3. DiscussionTo be more efficient, system I/O libraries generally don't write something to a file when you tell them to. Instead, they batch the writes together in a buffer and save all of them to disk at the same time. Using fflush( ) forces anything pending in the write buffer to be actually written to disk. Flushing output can be particularly helpful when generating an access or activity log. Calling fflush( ) after each message to logfile makes sure that any person or program monitoring the logfile sees the message as soon as possible. 23.13.4. See AlsoDocumentation on fflush( ) at http://www.php.net/fflush. |