DonCoder

Do race conditions usually exist when writing OR appending to an existing file? $f1 = fopen($filename1, 'r+'); $f2 = fopen($filename2, 'a'); flock($f1, LOCK_EX); flock($f2, LOCK_EX); fwrite($f1, 'foo'); fwrite($f2, 'foo'); flock($f1, LOCK_UN); flock($f2, LOCK_UN); fclose($f1); fclose($f2); What would happen if this code ran at the exact same time? Is there a chance that the data could be corrupted in the aforementioned code example?