PHP image manipulation class (1/3)_PHP tutorial

php image manipulation class This program can obtain image size, format and other information, and can also perform thumbnail processing and add watermarks to images.

php tutorial image manipulation class
This program can obtain image size, format and other information, and can also perform thumbnail processing on images and add watermarks to images.

class image{
         public $filename;
        private $info;
        private $im;

//Construction
         public function __construct($filename){
$this->filename = $filename;
$this->info = @getimagesize($filename);
If($this->info[2]>3){echo "Only supports gif, jpeg, png formats.";exit;}

}
         
//Load
         public function imgload(){
switch($this->info[2]){
case 1:
$this->im=@imagecreatefromgif($this->filename);
Break;
Case 2:
$this->im=@imagecreatefromjpeg($this->filename);
Break;
case 3:
$this->im=@imagecreatefrompng($this->filename);
Break;
}
}

// Save
         public function imagesave($img,$savename,$inf){
switch($inf){
case 1:
Imagegif($img,$savename);;
Break;
Case 2:
Imagejpeg($img,$savename);;
Break;
case 3:
Imagepng($img,$savename);;
Break;
}
                                                

//Filter
public function filter($arg=1,$savename=''){
$this->imgload();

if($savename=='')$savename='f_'.$this->filename;
$ok=false;
Switch($arg){
case 1:
Imagefilter($this->im,img_filter_negate);//Invert color
$ok=true;
Break;
case 2:
Imagefilter($this->im,img_filter_grayscale); //Black and white
$ok=true;
Break;
case 3:
Imagefilter($this->im,img_filter_emboss);//Emboss
$ok=true;
Break;
case 4:
Imagefilter($this->im,img_filter_gaussian_blur); //Gaussian blur
$ok=true;
Break;
case 5:
Imagefilter($this->im,img_filter_brightness,50); //Brightness 50
$ok=true;
Break;
case 6:
Imagefilter($this->im,img_filter_contrast,-50); //Contrast-50
$ok=true;
break;
}
if($ok){
$this->imagesave($this->im,$savename,$this->info[2]); //Write file
Imagedestroy($this->im);
Return 1;
}else{
Imagedestroy($this->im);
Return 0;}
}