Php image background filling instance

Php image background filling instance

/** * Add background * @ Param string $ src Image path * @ Param int $ w background image width * @ Param int $ h background image height * @ Return returns the image with the background added. ***/ Public function addBg ($ src, $ w, $ h) { $ Bg = imagecreatetruecolor ($ w, $ h ); $ White = imagecolorallocate ($ bg, 255,255,255 ); Imagefill ($ bg, $ white); // fill the background // Obtain the target image information $ Info = getimagesize ($ src ); $ Width = $ info [0]; // target image width $ Height = $ info [1]; // target Image height Switch ($ info [2]) { Case 1: $ Img = imagecreatefromgif ($ src ); Break; Case 2: $ Img = imagecreatefromjpeg ($ src ); Break; Case 3: $ Img = imagecreatefrompng ($ src ); Break; Default: Exit ('unsupported Image format '); Break; } If ($ height <$ h) { $ X = 0; $ Y = ($ h-$ height)/2; // center vertically } If ($ width <$ w) { $ X = ($ w-$ width)/2; // horizontally centered $ Y = 0; } If ($ height <$ h & $ width <$ w ){ $ X = ($ w-$ width)/2; $ Y = ($ h-$ height)/2; } Imagecopymerge ($ bg, $ img, $ x, $ y, 100, $ width, $ height ); Imagejpeg ($ bg, $ src, 100 ); Imagedestroy ($ bg ); Imagedestroy ($ img ); Return $ src; }