PHP file upload class code_PHP tutorial

[php]

/*

Single file upload

Function

Upload files

Configure allowed suffixes

Configure allowed size

Get file suffix

Determine the suffix of the file

Error reporting

*/

class UpTool{

protected $allowExt = 'jpg,jpeg,gif,bmp,png';

protected $maxSize = 1; //1M, in M ​​

protected $file = null; //Prepare to store uploaded file information

protected $errno = 0; //Error code

protected $error = array(

      0=>'No error',  

1=>'The uploaded file size exceeds the system limit',

2=>'The size of the uploaded file exceeds the web form limit',

3=>'Only part of the file was uploaded',

4=>'No files uploaded',

      6=>'Temporary folder not found',  

7=>'File writing failed',

8=>'Unallowed file suffix',

9=>'The file size exceeds the allowed range of the class',

10=>'Failed to create directory',

11=>'File move failed'

);

/*

Upload

*/

public function up($key) {

if (!isset($_FILES[$key])) {

return false;

} }

$f = $_FILES[$key];

//Check whether the upload is successful

if ($f['error']) {

$this->errno = $f['error'];

return false;

} }

//Get suffix

$ext = $this->getExt($f['name']);

//Check 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 a 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

Automatically add allowed suffixes and file size

*/

public function setExt($exts) {

$this->allowExt = $exts;

}

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

Prevent capitalization issues

*/

protected function isAllowExt($ext) {

return in_array(strtolower($ext), explode(',', strtolower($this->allowExt)));

                                                                   

}

/*

Check file size

*/

protected function isAllowSize($size) {

return $size <= $this->maxSize *1024*1024;

}

//How 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;

} }

}

/*

Generate a random file name

*/

protected function randName($length = 6) {

$str = 'abcdefghijkmnpqrstuvwxyz23456789';

return substr(str_shuffle($str),0,$length);

}

}

form form

[html]

Username:

Avatar:

Call from another page

[php]

require('./UpTool.class.php');

$uptool = new UpTool();

$uptool->setExt('rar,doc');

$uptool->setSize(1);

if ($uptool->up('pic')) {

echo 'Upload successful';

} else {

echo 'failed';

echo $uptool->getErr();

}

http://www.bkjia.com/PHPjc/477843.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/477843.htmlTechArticle[php] /* Single file upload function Upload file configuration Allowed suffix configuration Allowed size Get file suffix judgment file The suffix reports an error */ class UpTool{ protected $allowExt = jp...