if (file_exists($fn)) {//如果文件存在
echo 'Successed!<br>';
file_put_contents($fn,'nihao');
echo file_get_contents($fn);
}
else{//否则重建
echo 'Failed!';
$counter_file = '/data/webroot/usercode/code/test2.txt';
$fn = fopen($counter_file,'wb');
file_put_contents($fn,'nihao');
echo file_get_contents($fn);
}
