PHP file upload program code_PHP tutorial

Now we only need to search for a lot of file upload classes, but there are not many upload classes that are really useful. Below I will introduce this file upload class, which I have used for a long time. It is a very good code. You can refer to Reference 1.

The code is as follows

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/**
* File upload class
*/
class uploadFile {

public $max_size = '1000000';//Set the upload file size
public $file_name = 'date';//The renaming method represents naming by time, and others use given Name
public $allow_types;//File extensions allowed to be uploaded, different file types are separated by "|"
public $errmsg = '';//Error message
public $uploaded = '' ;//Uploaded file name (including file path)
public $save_path;//Uploaded file saving path
private $files;//Submitted files waiting to be uploaded
private $file_type = array() ;//File type
private $ext = '';//Upload file extension

/**
* Constructor, initialization class
* @access public
* @param string $file_name Uploaded file name
* @param string $save_path Uploaded target folder
*/
public function __construct($save_path = './upload/ ',$file_name = 'date',$allow_types = '') {
                                                                                                                                  use   use to be named                                                    ->save_path = (preg_match('//$/',$save_path)) ? $save_path : $save_path . '/';
$this->allow_types = $allow_types == '' ? 'jpg| gif|png|zip|rar' : $allow_types;
}

/**
* Upload files
* @access public
* @param $files Files waiting to be uploaded ($_FILES[] from the form)
* @return boolean Return Boolean value
*/
public function upload_file($files) {
$name = $files[ 'name'];
$type = $files['type'];
$size = $files['size'];
$tmp_name = $files['tmp_name'];
$error = $files['error'];

switch ($error) {
case 0 : $this->errmsg = '';
break;
case 1 : $this->errmsg = 'Exceeded the file size in php.ini';
                                                                                                                                                                                                                                                                   break;
                                                                                                                                                                                                                      > Break; Case 5: $ this-& gt; errmsg = 'Upload file size is 0';
Break;
default: $ this-& gt; errmsg = 'Upload file fails! ';
break;
}
If($error == 0 && is_uploaded_file($tmp_name)) {
//Detect file type
if($this->check_file_type($name) == FALSE){
return FALSE;
                                                                                                                                                                                                                                                                                             = red>'.$name.' is too large, the maximum supported file is '.ceil($this->max_size/1024).'kb';
            return FALSE; ?$this-> ;file_name.'.'.$this->ext : date('YmdHis').'.'.$this->ext;//Set the new file name
                                                                                                ->save_path.$new_name;//Uploaded file name
                                                                                                                                                                                                  = 'File'.$this->uploaded.'Uploaded successfully! ';
                return TRUE; ! ';
                return FALSE;                                                              $filename){
        $ext = $this->get_file_type($filename);
         $this->ext = $ext;
           $allow_types = explode('|',$this->allow_types);// Split the file extensions that are allowed to be uploaded into an array
//echo $ext;
//Check whether the uploaded file extension is among the file extensions that are allowed to be uploaded
if(in_array($ext,$allow_types )){
                         return TRUE; Support upload & lt; font color = red & gt; '. Str_replace (' | ',', ', $ this- & gt; all_types).
}
}

/**
* Check the uploaded file type
* @access public
* @param string $filename The name of the file waiting to be checked
* @return Returns TRUE if the check passes, FALSE and an error message if it fails
*/
public function get_file_type($filename){
$info = pathinfo ($filename); > Public function set_save_path(){
$this->save_path = (preg_match('//$/',$this->save_path)) ? $this->save_path : $this->save_path . '/';
if(!is_dir($this->save_path)){
//If the directory does not exist, create the directory
}
}


/**
* Set the saving path after uploading the file
*/
public function set_dir($dir = null){
//Check whether the path exists
if(!$dir } ';
}
$dir = explode('/', $dir);
foreach($dir as $v){
if($v){
$d .= $v . '/';
if(!is_dir($d)){
$state = mkdir($d, 0777);
if(!$state)
$this-> ;errmsg = 'Error creating directory ' . $d . '! ' ;
class uploadImg extends uploadFile {

public $mark_str = 'kickflip@php100'; //Watermark string
public $str_r = 0; //String color R
public $str_g = 0; // String color G
public $str_b = 0; //String color B
public $mark_ttf = './upload/SIMSUN.TTC'; //Watermark text font file (including path)
public $mark_logo = './upload/logo.png'; //Watermark image
public $resize_h;//Generate thumbnail height
public $resize_w;//Generate thumbnail width
public $source_img; //Source image file
public $dst_path = './upload/';//Thumbnail file storage directory, if left blank, it will be the source image storage directory

/**
* Generate thumbnail The picture after the thumbnail is generated
* @access public
* @param integer $w The width of the reduced image (px)
* @param integer $h The height of the reduced image (px)
* @param string $source_img Source image ( Path + file name)
*/
public function img_resized($w,$h,$source_img = NULL){
$source_img = $source_img == NULL ? $this->uploaded : $source_img ;//Get the address of the source file. If it is empty, it defaults to the last uploaded image
if(!is_file($source_img)) { //Check whether the source image exists
$this->errmsg = 'File'.$source_img.' does not exist';
return FALSE;
}
$this->source_img = $source_img;
$source = $this->img_create($source_img); //Create source image
            $this->resize_w = $w;
              $this->resize_h =  $h;  
            $thumb = imagecreatetruecolor($w,$h);
imagecopyresized($thumb,$source,0,0,0,0,$w,$h,$img_info[0],$img_info[1]);// Generate thumbnail images
$dst_path = $this->dst_path == '' ? $this->save_path : $this->dst_path; //Get the target folder path
$dst_path = (preg_match ('//$/',$dst_path)) ? $dst_path : $dst_path . '/';//Add /
after the target folder if(!is_dir($dst_path)) $this-> set_dir($dst_path); //If the target folder does not exist, create
$dst_name = $this->set_newname($source_img);
$this->img_output($thumb,$dst_name); //Output image
imagedestroy($source);
imagedestroy($thumb);
}

/**
*Watermark
*@access public
*@param string $source_img Source image path + file name
*@param integer $mark_type Watermark type (1 is English string, 2 is Chinese character String, 3 is the picture logo, the default is the English string)
*@param integer $mark_postion watermark position (1 is the lower left corner, 2 is the lower right corner, 3 is the upper left corner, 4 is the upper right corner, the default is the lower right corner) ;
*@return watermarked picture
*/
public function img_mark($source_img = NULL,$mark_type = 1,$mark_postion = 2) {
$source_img = $source_img == NULL ? $this->uploaded : $source_img;//Get the address of the source file, if it is empty, the default is the above The image uploaded this time
if(!is_file($source_img)) { //Check whether the source image exists
$this->errmsg = 'File'.$source_img.'does not exist';
return FALSE;
}
$this->source_img = $source_img;
$img_info = getimagesize($source_img);
$source = $this->img_create($source_img); // Create source image
$mark_xy = $this->get_mark_xy($mark_postion);//Get the watermark position
$mark_color = imagecolorallocate($source,$this->str_r,$this->str_g, $this->str_b);

switch($mark_type) {

case 1: //Add English string watermark
$str = $this->mark_str; ImageString ($ Source, 5, $ Mark_xy [0], $ Mark_xy [1], $ Str, $ Mark_color); reak;

Case 2: // Add Chinese string watermark
if (! IS_FILE ($ this- & gt; mark_ttf)) {// Check whether the font file exists
$ this- & gt; errmsg = 'Watermark failure: font failure: font File '. $ This- & gt; mark_ttf.' Does not exist! ';
Return false;
}
$ Str = $ this- & gt; mark_str;
// $ str = iconv (' '' ' gbk','utf-8',$str);//Convert character encoding. If you use GBK encoding, please remove the comment on this line
. Watermark
If(is_file($this->mark_logo)){ //If there is a watermark logo image, get the basic information of the logo image, if it does not exist, exit
mark_logo);
            }else{
                                                                                                                                                                     mark_logo); ';
                return FALSE;
            }
 
            $logo_info = getimagesize($this->mark_logo);
            if($logo_info[0]>$img_info[0] || $logo_info[1]>$img_info[1]) { //If the source image is smaller than the logo size, exit
                                                                                                                   'Smaller than '.$this->mark_logo.'! ' ; source, $logo, $mark_xy[ 4], $mark_xy[5], 0, 0, $logo_info[0], $logo_info[1]);
                                                                                                   >
default: //Others are text images
$str = $this->mark_str;
imagestring($source,5,$mark_xy[0],$mark_xy[1],$str ,$mark_color);
$this->img_output($source,$source_img);
break;
}
imagedestroy($source);
}

/**
* Get the watermark position
* @access private
* @param integer $mark_postion The position of the watermark (1 is the lower left corner, 2 is the lower right corner, 3 is the upper left corner, 4 is the upper right corner, others are right Lower corner)
* @return array $mark_xy The coordinates of the watermark position (index 0 is the English string watermark coordinate X, index 1 is the English string watermark coordinate Y,
* Index 2 is the Chinese string watermark coordinate X, Index 3 is the Chinese string watermark coordinate Y, index 4 is the watermark image coordinate X, index 5 is the watermark image coordinate Y)
*/
private function get_mark_xy($mark_postion){
$img_info = getimagesize($this->source_img);

$stre_w = strlen($this->mark_str)*9+5; //The length of the watermark English string (px) (the English character size of size 5 is about 9px, plus 5px for beauty)
                          (The Chinese character size of size 12 is 12px. In utf8, the length of a Chinese character is 3 bytes and 4px per byte, while the length of an English character is approximately 9px
// In order to mix Chinese and English As shown below, set its length to the number of bytes*7px)
$strc_w = strlen($this->mark_str)*7+5; //The length of the watermark Chinese string (px)

If(is_file($this->mark_logo)){ //If there is a watermark logo image, get the basic information of the logo image
$logo_info = getimagesize($this->mark_logo);
}

//Due to the different starting positions of strings in the imagestring function and imagettftext function, the Y positions of English and Chinese strings are also different
//The imagestring function is referenced from the upper left corner of the text. The imagettftext function is From the lower left corner of the text as a reference
switch($mark_postion){

case 1: //Position lower left corner
$mark_xy[0] = 5; //Watermark English string coordinates X
             $mark_xy[1] = $img_info[1]-20; // Watermark English string coordinates Y
             $mark_xy[2] = 5; //              Chinese string coordinates = $ img_info [1] -5; // Watermark Chinese string coordinates y
$ MARK_XY [4] = 5; // Watermark image coordinates x
$ MARK_XY [5] = $ img_info [1]-$ $ $ logo_info[1]-5; //Watermark image coordinates Y
break;

case 2: //Position lower right corner
$mark_xy[0] = $img_info[0]-$stre_w; //Watermark English string coordinates ; //Watermark Chinese string coordinates logo_info[0]-5;//Watermark image coordinates
          case 3: //Position upper left corner
                                                                                                                                                                                                                                 _> $ Mark_xy [2] = 5; // Watermark Chinese string coordinates x
$ Mark_xy [3] = 15; // Watermark Chinese String Coordinates y
$ Mark_xy [4] = 5; // Watermark image coordinates img_info[0]-$stre_w; //Watermark English string coordinates $strc_w; //Watermark Chinese string coordinates$mark_xy[4] = $img_info[0]-$logo_info[0]-5;//Watermark image coordinates >
default: // Other defaults are the lower right corner
$mark_xy[0] = $img_info[0]-$stre_w; // Watermark English string coordinates X
$mark_xy[1] = $img_info [1]-5;//The watermark English string coordinates Y
                                                                                                                                              img_info[1]-15;//Watermark Chinese string coordinates Y
                                                                                                                                                                         5] = $img_info[1]-$logo_info[1]-5;//Watermark image coordinates Y
break;
}
return $mark_xy;
}

/ **
* Create a source image
* @access private
* @param string $source_img Source image (path + file name)
* @return img Create an image from the target file
*/
private function img_create($source_img) {
$info = getimagesize($source_img);
switch ($info[2]){
case 1:
If(!function_exists('imagecreatefromgif')){
$source = @imagecreatefromjpeg($source_img);
}else{
$source = @imagecreatefromgif ($source_img);
}
             break; $source = @imagecreatefrompng($source_img);
break ;
                                                                                                                                                                                                               $source =                                                                               🎜> break;
}
return $source;
}

/**
* Rename the image
* @access private
* @param string $source_img Source image path + file name
* @return string $dst_name Renamed image name (path + file name)
*/
private function set_newname($sourse_img) {
$info = pathinfo($sourse_img);
$new_name = $this->resize_w.'_'.$this->resize_h.'_'.$info['basename'];//Change the file name to: width_height_filename
if( $this->dst_path == ''){ //If the path to store the thumbnail is empty, it defaults to the same folder as the source file
                                                                                                                                  );
}else{
$dst_name = $this->dst_path.$new_name;
}
return $dst_name;
}

/**
* Output picture
* @access private
* @param $im processed image
* @param $dst_name output image name (path + file name)
* @return output image
*/
public function img_output($ im,$dst_name) {
$info = getimagesize($this->source_img);
switch ($info[2]){
case 1:
if(!function_exists('imagegif ')){
imagejpeg($im,$dst_name);
}else{
imagegif($im, $dst_name);
}
          break;
           case 2:
                       imagejpeg($im,$dst_name); 🎜>         case 6:
                    imagewbmp( $im,$dst_name);
break;
}
}

}
?>




Usage

The code is as follows

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td>

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