Posted by paul on 09/06/05 02:00

Hi,

If more than one user clicks the submit button at the same time can I use
flock to ensure that all the data gets written to the file? Is the following
code correct?

Thanks,

Paul
=======================
// open for writing
$fp = fopen($filename, "a") or die("Unable to open file, please try again
later.");

// wait for unlock if it's busy
while(TRUE) // do forever
{
if( flock($fp, LOCK_EX) )
{
// write to file
fwrite($fp, $first);
fwrite($fp, $last);
fwrite($fp, $phone);

// unlock file
flock($fp, LOCK_UN);
break; // done, get out of loop
}
sleep(1); // wait a second and try again
}

// close file
fclose($fp);
============================

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