feof
Just a note that fflush takes care of the cache already, at least on my server. Using clearstatcache before reading a previously written file also worked, but lagged the output time much more noticeably (by two or three seconds), probably due to excess cache erasing beyond files.
fflush
(PHP 4 >= 4.0.1, PHP 5)
fflush — Flushes the output to a file
Description
bool fflush
( resource $handle
)
This function forces a write of all buffered output to the resource pointed to by the file handle .
Parameters
- handle
-
The file pointer must be valid, and must point to a file successfully opened by fopen() or fsockopen() (and not yet closed by fclose()).
Return Values
Returns TRUE on success or FALSE on failure.
add a note
User Contributed Notesfflush
oryan at zareste dot com
30-Oct-2005 10:48
30-Oct-2005 10:48
jzho327 at cse dot unsw dot edu dot au
27-Jan-2003 06:27
27-Jan-2003 06:27
Sorry, the note I previously added regarding fflush() has a bug!
when you read file by calling
$fp = fopen("myfile", "a+");
and you wish to read the content, you have to call
rewind($fp) before you attemp to read it. (Silly me) Or else if you tried something like
$fp = fopen("myfile", "a+");
$content = fread($fp);
// show that content is in fact null
if ($content == NULL)
print "but it must be first put to rewind<br>\n";
will result
but it must be first put to rewind.
[new line]
in fact, if you are not careful (like me), and you opened it with
$fp = fopen("myfile", "r+");
$content = fread($fp);
..
// do something with content
..
then you tried to again
$content = fread($fp);
without rewind, you'd get NULL again. This sounds trivial, but if you work with several file resources, with freads and fopens everywhere, you can get easily lost. So becareful.