PHP 文件或文件夹类操作
将字节转换为可读文本
function format_bytes($size, $delimiter = '')
{
$units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
for ($i = 0; $size >= 1024 && $i < 6; $i++) {
$size /= 1024;
}
return round($size, 2) . $delimiter . $units[$i];
}
读取某个文件夹下的内容
function get_dir_list($dir)
{
$files = array();
if (@$handle = opendir($dir))
{
while (($file = readdir($handle)) !== false)
{
if ($file != ".." && $file != ".")
{
if (is_dir($dir . "/" . $file))
{
$files[$file] = get_dir_list($dir . "/" . $file);
}
else
{
$files[] = $file;
}
}
}
closedir($handle);
return $files;
}
}
判断文件或文件夹是否可写
function is_really_writable($file)
{
if (DIRECTORY_SEPARATOR === '/') {
return is_writable($file);
}
if (is_dir($file)) {
$file = rtrim($file, '/') . '/' . md5(mt_rand());
if (($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
@chmod($file, 0777);
@unlink($file);
return true;
} elseif (!is_file($file) or ($fp = @fopen($file, 'ab')) === false) {
return false;
}
fclose($fp);
return true;
}
删除文件夹
function rmdirs($dirname, $withself = true)
{
if (!is_dir($dirname)) {
return false;
}
$files = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($dirname, RecursiveDirectoryIterator::SKIP_DOTS),
RecursiveIteratorIterator::CHILD_FIRST
);
foreach ($files as $fileinfo) {
$todo = ($fileinfo->isDir() ? 'rmdir' : 'unlink');
$todo($fileinfo->getRealPath());
}
if ($withself) {
@rmdir($dirname);
}
return true;
}
复制文件夹
function copydirs($source, $dest)
{
if (!is_dir($dest)) {
mkdir($dest, 0755, true);
}
foreach ($iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source, RecursiveDirectoryIterator::SKIP_DOTS), RecursiveIteratorIterator::SELF_FIRST) as $item) {
if ($item->isDir()) {
$sontDir = $dest . DS . $iterator->getSubPathName();
if (!is_dir($sontDir)) {
mkdir($sontDir, 0755, true);
}
} else {
copy($item, $dest . DS . $iterator->getSubPathName());
}
}
}