PHP - 目录、文件操作

<?php
/**
* Read Directory.
* Just read the top-level directory.
* @param string $path directory
* Eg:readDirectory( 'file/' );
* @return array directory array
*/
function readDirectory( $path ) {
//open directory handle.
$dirHanlde = opendir( $path );
//Loop through directory.
while ( ( $item = readdir( $dirHanlde ) ) !== FALSE ) {
$p = $path . '/' . $item;
if ( $item == '.' || $item == '..' ) continue;
if ( is_file( $p ) ) $arr['file'][] = $item;
if ( is_dir( $p ) ) $arr['dir'][] = $item;
}
//close directory handle.
closedir( $dirHanlde );
//return result.
return $arr;
}/**
* calculate directory size.
* @param string directory size.
* @return $num
*/
function dirSize( $path ) {
static $num;
$openHandle = opendir( $path );
while ( ( $item = readdir( $openHandle ) ) !== FALSE ) {
$p = $path . '/' . $item;
if ( $item == '.' || $item == '..' ) continue;
if ( is_file( $p ) ) $num += filesize( $p );
if ( is_dir( $p ) ) dirSize( $p );
}
closedir( $openHandle );
return $num;
}/**
* copy directory
* Eg:
* - copyDir( 'file/', 'abc/file' );
* - copyDir( 'file/a', 'abc/def/a' );
* @return [type] [description]
*/
function copyDir( $src, $dst ) {
if ( ! file_exists( $dst ) ) mkdir( $dst, 0777, true );
$openHandle = opendir( $src );
while ( ( $item = readdir( $openHandle ) ) !== FALSE ) {
$srcpath = $src . '/' . $item;
$dstpath = $dst . '/' . $item;
if ( $item == '.' || $item == '..' ) continue;
if ( is_file( $srcpath ) ) copy( $srcpath, $dstpath );
if ( is_dir( $srcpath ) ) copyDir( $srcpath, $dstpath );
}
closedir( $openHandle );
return true;
}

<?php
/**
* Conversion Bytes.
* Eg:transBytes( 500000 );
* @param int $size Bytes.
* @return float return value.
*/
function transBytes( $size ) {
$byteUnits = 0;
$arr = array( 'B', 'KB', 'MB', 'GB', 'TB', 'EB');
while ( $size >= 1024 ) {
$size /= 1024;
$byteUnits++;
}
return round( $size, 2 ) . $arr[ $byteUnits ];
}/**
* create file. include path.
* Eg:createFile( 'file/abc.txt' );
* @param string $filename filename(include path.).
* @return string result message.
*/
function createFile( $filename ) {
//check file.
if ( checkFile( $filename ) ) {
//create file.
if ( @touch( $filename ) ) {
return 'Success!';
} else { return 'Failed to create file.'; }
} else { return 'check file faild!'; }
}/**
* rename file.
* Eg:renameFile( 'file/lllllssss.txt', 'file/abc.txt' );
* @param string $oldname old file name.
* @param string $newname new file name.
* @return result.
*/
function renameFile( $oldname, $newname ) {
//check file.
if ( checkFile( $newname ) ) {
//create file.
if ( @rename( $oldname, $newname ) ) {
return 'Success!';
} else { return 'Failed to rename file.'; }
} else { return 'check file faild!'; }
}/**
* delete file.
* Eg:delFile( 'file/lllll.html' );
* @param string file path.
* @return return message.
*/
function delFile( $name ) {
( @unlink( $name ) ) ? $resultMsg = 'Delete Success!' : $resultMsg = 'Delete Faild!';
return $resultMsg;
}/**
* download file.
* Eg:downFile( 'file/abc.html' );
* @param string filename
* @return download file name
*/
function downFile( $filename ) {
header( 'Content-Disposition:attachment;filename=' . basename( $filename ) );
header( 'Content-length:' . filesize( $filename ) );
readfile( $filename );
}/**
* check file.
* Eg:checkFile( $name );
* include:
* - Function checkFileName()
* - Function checkFileExists()
* @param string $name file name.
* @return bool
*/
function checkFile( $name ) {
//verify the file name.
if ( checkFileName( $name ) ) {
//To determine whether the file already exists
if ( checkFileExists( $name ) ) {
return true;
} else { return false; }
} else { return false; }
}/**
* check file name.
* Eg:checkFileName( 'abc.txt' );
* @param string $name file name.
* @return bool success return true,faild return false.
*/
function checkFileName( $name ) {
//Regular Expressions.
//very that the file name is valid.
$pattern = "/[\/,\*,<>,\?\|]/";
//verify the file name.
//return
return @preg_match( $pattern, basename( $name ) );
}/**
* check file exists.
* inlcude path.
* Eg:checkFileExists( 'nnn.txt' );
* @param string $name file name.
* @return bool success return true,faild return false.
*/
function checkFileExists( $name ) {
return @file_exists( $name );
}

<?php
/**
* Dispaly information and jump pages.
* @param string $msg display information.
* @param string $path jump path.
* @return This function has no return value.
*/
function alertMsg( $msg, $path ) {
echo "<script type='text/javascript'>alert('" . $msg . "');location.href = '" . $path . "';</script>";
}