PHP - 目录、文件操作

目录操作：

<?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;
}

文件操作：

<?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 );
}

公共操作：

<?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>";
}