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<?php
$cfile = "test.txt";
$fh = @fopen($cfile, "r+") or die("<BR>Failed to open file <I>$cfile</I>.");
@flock($fh, LOCK_EX) or die("<BR>Could not lock file <I>$cfile</I>.");
$s = @fgets($fh, 6);
$count = (int) $s + 1;
$count = str_pad($count, 6);
@rewind($fh) or die("<BR>Failed to rewind file <I>$cfile</I>.");
if (@fwrite($fh, $count) == -1) {
die("<BR>Failed to write to file <I>$cfile</I>.");
}
echo "$count";
@flock($fh, LOCK_UN) or die("<BR>Could not unlock file <I>$cfile</I>.");
fclose($fh) or die("<BR>Failed to close file <I>$cfile</I>.");
?>
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