Php image operations (1/3)

The code is as follows:

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Class image { Public $ filename; Private $ info; Private $ im;    // Construct Public function _ construct ($ filename ){ $ This-> filename = $ filename; $ This-> info = @ getimagesize ($ filename ); If ($ this-> info [2]> 3) {echo "only supports gif, jpeg, and 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); // reversed $ OK = true; Break; Case 2: Imagefilter ($ this-> im, img_filter_grayscale); // Black/White $ OK = true; Break; Case 3: Imagefilter ($ this-> im, img_filter_emboss); // embossed $ 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 a file Imagedestroy ($ this-> im ); Return 1; } Else { Imagedestroy ($ this-> im ); Return 0 ;}  }

 

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