PHP File Upload Class code

/* Single file upload feature upload file configuration allowed suffix configuration allowed size get file suffix judge file suffix error */class uptool{protected $allowExt = ' Jpg,jpeg,gi      F,bmp,png '; protected $maxSize = 1; 1M, protected $file = NULL in M units;  Prepare to store upload file information protected $errno = 0; Error code protected $error = Array (0=> ' no error ', 1=> ' upload file size exceeds system limit ', 2=> ' upload file The size exceeds the page form limit ', 3=> ' file is only partially uploaded ', 4=> ' no files are uploaded ', 6=> ' cannot find Temp folder ', 7 =              > ' File write Failed ', 8=> ' disallowed file suffix ', 9=> ' file size exceeds the allowable range of class ', 10=> ' failed to create directory ',        11=> ' file move failed ');          /* Upload */Public function up ($key) {if (!isset ($_files[$key])) {return false;            } $f = $_files[$key];              Verify that the upload was successful if ($f [' ERROR ']) {$this->errno = $f [' ERROR '];          return false; }//Get suffix $ext = $this->getext ($f [' name ']);          Check the suffix if (! $this->isallowext ($ext)) {$this->errno = 8;          return false;              }//Check size if (! $this->isallowsize ($f [' size '])) {$this->errno = 9;          return false;          }//Create directory $dir = $this->mk_dir ();              if ($dir = = False) {$this->errno = 10;          return fasle; }//Generate random file name $newname = $this->randname ().          '. '. $ext; $dir = $dir.          '/'. $newname; Move if (!move_uploaded_file ($f [' tmp_name '), $dir.              '/'. $newname)) {$this->errno = 11;          return false;      } return True;//str_replace (ROOT, ", $dir);      } public Function Geterr () {return $this->error[$this->errno]; }/* Parm string $exts allowed suffixes to automatically add the allowed suffixes, and the size of the file */Public Function Setext ($exts) {$thi      S->allowext = $exts;The Public Function setSize ($num) {$this->maxsize = $num;          }/* String $file return string $ext suffix */protected function Getext ($file) {          $tmp = Explode ('. ', $file);      Return end ($TMP);          }/* string $ext file suffix return bool prevents case-sensitive issues */protected function Isallowext ($ext) {                Return In_array (Strtolower ($ext), explode (', ', Strtolower ($this->allowext)); }/* Check the size of the file */protected function isallowsize ($size) {return $size <= $this->ma      Xsize *1024*1024;          }//method to create a directory by date protected function Mk_dir () {$dir = ' images/'. Date (' ym/d ');          if (Is_dir ($dir) | | mkdir ($DIR, 0777,true)) {return $dir;          } else {return false; }/* Generates a random file name */protected function randname ($length = 6) {$str = ' abcdefghijkmn pqrstuvwxyz23456789 ';          Return substr (Str_shuffle ($STR), 0, $length); }    }

Form form

<form action= "up.php" method= "post" enctype= "Multipart/form-data" >          user name: <input type= "text" Name= " Username "/> <br/>          Avatar:   <input type=" file "name=" pic "/>          <input type=" Submit "value=" Submit " />      </form>

Another page call

Require ('./uptool.class.php ');    $uptool = new Uptool ();  $uptool->setext (' Rar,doc ');  $uptool->setsize (1);      if ($uptool->up (' pic ')) {      echo ' upload succeeded ';  } else {      echo ' failed ';      echo $uptool->geterr ();  }

PHP File Upload Class code