php文件目录操作实现程序(1/2)_PHP教程

$base_dir = "filelist/";
$fso = opendir($base_dir);
echo $base_dir."

mkdir($path,0777)

rmdir($path)

$d = dir("/etc/php5");
echo "Handle: " . $d->handle . "n";
echo "Path: " . $d->path . "n";
while (false !== ($entry = $d->read())) {
echo $entry."n";
}
$d->close();
?>

$file = 'dirlist.php';
if (is_readable($file) == false) {
die('文件不存在或者无法读取');
} else {
echo '存在';
}
?>

$file = "filelist.php";
if (file_exists($file) == false) {
die('文件不存在');
}
$data = file_get_contents($file);
echo htmlentities($data);
?>

$fso = fopen($cacheFile, 'r');
$data = fread($fso, filesize($cacheFile));
fclose($fso);

$data = implode('', file($file));

$file = 'dirlist.php';
if (is_writable($file) == false) {
die("我是鸡毛,我不能");
}
?>

$file = 'dirlist.php';
if (is_writable($file) == false) {
die('我是鸡毛,我不能');
}
$data = '我是可鄙,我想要';
file_put_contents ($file, $data);
?>

$f = fopen($file, 'w');
fwrite($f, $data);
fclose($f);

function cache_page($pageurl,$pagedata){
if(!$fso=fopen($pageurl,'w')){
$this->warns('无法打开缓存文件.');//trigger_error
return false;
}
if(!flock($fso,LOCK_EX)){//LOCK_NB,排它型锁定
$this->warns('无法锁定缓存文件.');//trigger_error
return false;
}
if(!fwrite($fso,$pagedata)){//写入字节流,serialize写入其他格式
$this->warns('无法写入缓存文件.');//trigger_error
return false;
}
flock($fso,LOCK_UN);//释放锁定
fclose($fso);
return true;
}