PHP_文件操作及文件下载

// 文件操作的类

 

0){ $args = func_get_args(); $this->thepath = $args[0]; } } //A function to open the file. private function openfile ($readorwrite){ //First, ensure the file exists. try { if (file_exists ($this->thepath)){ //Now, we need to see if we are reading or writing or both. $proceed = false; if ($readorwrite == "r"){ if (is_readable($this->thepath)){ $proceed = true; } } elseif ($readorwrite == "w"){ if (is_writable($this->thepath)){ $proceed = true; } } else { if (is_readable($this->thepath) && is_writable($this->thepath)){ $proceed = true; } } try { if ($proceed){ //We can now attempt to open the file. try { if ($filepointer = fopen ($this->thepath, $readorwrite)){ return $filepointer; } else { throw new exception (self::OPENERROR); return false; } } catch (exception $e) { echo $e->getmessage(); } } else { throw new exception (self::PERMERROR); } } catch (exception $e) { echo $e->getmessage(); } } else { throw new exception (self::FOUNDERROR); } } catch (exception $e) { echo $e->getmessage(); } } //A function to close a file. function closefile () { try { if (!fclose ($this->thepath)){ throw new exception (self::CLOSEERROR); } } catch (exception $e) { echo $e->getmessage(); } } //A function to read a file, then return the results of the read in a string. public function read () { //First, attempt to open the file. $filepointer = $this->openfile ("r"); //Now, return a string with the read data. if ($filepointer != false){ //Then we can read the file. return fgets ($filepointer); } //Lastly, close the file. $this->closefile (); } //A function to write to a file. public function write ($towrite) { //First, attempt to open the file. $filepointer = $this->openfile ("w"); //Now, return a string with the read data. if ($filepointer != false){ //Then we can read the file. return fwrite ($filepointer, $towrite); } //Lastly, close the file. $this->closefile (); } //A function to append to a file. public function append ($toappend) { //First, attempt to open the file. $filepointer = $this->openfile ("a"); //Now, return a string with the read data. if ($filepointer != false){ //Then we can read the file. return fwrite ($filepointer, $toappend); } //Lastly, close the file. $this->closefile (); } //A function to set the path to a new file. public function setpath ($newpath) { $this->thepath = $newpath; } } ?> read(); //Then let's try writing to the file. $myfile->write ("Hello World!"); //Then, let's try appending. $myfile->append ("Hello Again!"); ?>

 

// 文件下载