String not saved into file ?

[czy11421]

why this code doesn't work ? it will echo result, but the String is NOT saved into file "sys.log" .

Thanks.

The echo result is

log Resource id #5
result saved : 31
close file : 1

class LogUtil {

static function log($msg) {

    $filename = "sys.log";

    // open file

    ($fd = fopen($filename, "a") ) or die ("Couldn't open file, sorry");

    date_default_timezone_set('America/New_York');

    // append date/time to message
    $str = "[" . date("Y/m/d h:i:s", mktime()) . "] " . $msg;

    echo 'log '.$fd.'<br>';

    // write string
    $rtn = fwrite($fd, $str . "\n");

    echo 'result saved : '.$rtn.'<br>';

    // close file
    $rtn = fclose($fd);

    echo 'close file : '.$rtn.'<br>';
}
}

[halojoy]

fwrite() returns the number of bytes written, or FALSE on error.

result saved : 31

which means 31 bytes were written to your sys.log file

Better take another look.