Add text watermarks to existing images using php code

Add text watermarks to existing images using php code

The php class library adds text watermarks to existing images. the code is not very complete. thank you for your advice! The code is as follows: /* PHP image and text watermark class library QQ: 3697578482 sad songs Currently, this class library only supports text watermarks. the position is in the lower right corner and the color is random. Call method: 1. introduce a class library at the top of the file to be watermarked: Include_once 'imageclass. php '; 2. declare a new class: $ Tpl = new image_fu; 3. provide parameters for image watermarks: $ Tpl-> img (image path, watermark text, font path, font size, font angle ); For example: $ tpl-> img('abc.jpg ', 'This is the watermark text', 'ziti. ttf) */ Class image_fu { Private $ image; Private $ img_info; Private $ img_width; Private $ img_height; Private $ img_im; Private $ img_text; Private $ img_ttf = ''; Private $ img_new; Private $ img_text_size; Private $ img_jd; Function img ($ img = '', $ txt ='', $ ttf = '', $ size = 12, $ jiaodu = 0 ){ If (isset ($ img) & file_exists ($ img) {// check whether the image exists $ This-> image = $ img; $ This-> img_text = $ txt; $ This-> img_text_size = $ size; $ This-> img_jd = $ jiaodu; If (file_exists ($ ttf )){ $ This-> img_ttf = $ ttf; } Else { Exit ('font File: '. $ ttf.' does not exist! '); } $ This-> imgyesno (); } Else { Exit ('Image File: '. $ img.' doesn't exist '); } } Private function imgyesno (){ $ This-> img_info = getimagesize ($ this-> image ); $ This-> img_width = $ this-> img_info [0]; // image width $ This-> img_height = $ this-> img_info [1]; // picture height // Check the image type Switch ($ this-> img_info [2]) { Case 1: $ this-> img_im = imagecreatefromgif ($ this-> image); break; Case 2: $ this-> img_im = imagecreatefromjpeg ($ this-> image); break; Case 3: $ this-> img_im = imagecreatefrompng ($ this-> image); break; Default: exit ('watermarks are not supported in image format '); } $ This-> img_text (); } Private function img_text (){ Imagealphablending ($ this-> img_im, true ); // Set the color $ Color = imagecolorallocate ($ this-> img_im, rand (0,255), rand (0,255), rand (0,255 )); $ Txt_height = $ this-> img_text_size; $ Txt_jiaodu = $ this-> img_jd; $ Ttf_im = imagettfbbox ($ txt_height, $ txt_jiaodu, $ this-> img_ttf, $ this-> img_text ); $ W = $ ttf_im [2]-$ ttf_im [6]; $ H = $ ttf_im [3]-$ ttf_im [7]; // $ W = $ ttf_im [7]; // $ H = $ ttf_im [8]; Unset ($ ttf_im ); $ Txt_y = $ this-> img_height-$ h; $ Txt_x = $ this-> img_width-$ w; // $ Txt_y = 0; // $ Txt_x = 0; $ This-> img_new = @ imagettftext ($ this-> img_im, $ txt_height, $ txt_jiaodu, $ txt_x, $ txt_y, $ color, $ this-> img_ttf, $ this-> img_text ); @ Unlink ($ this-> image); // delete an image Switch ($ this-> img_info [2]) {// Obtain the background image format Case 1: imagegif ($ this-> img_im, $ this-> image); break; Case 2: imagejpeg ($ this-> img_im, $ this-> image); break; Case 3: imagepng ($ this-> img_im, $ this-> image); break; Default: exit ('watermark Image failed '); } } // Display the image Function img_show () {echo 'image. '"border =" 0 "alt ="'. $ this-> img_text. '"/> ';} // Release the memory Private function img_nothing (){ Unset ($ this-> img_info ); Imagedestroy ($ this-> img_im ); } } ?>

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