Example of adding a watermark to a PHP image

example, PHP adds a watermark code to a picture. /* Example $image = new Gimage (); $image->limit = 600;//length and width limit $image->wm_text= "www.linuxlaptop.cn";//Watermark Text $image->wm_fontfile= "Font/xsuni.ttf";//font file $image->wm_color= "#ff0000 ″; $image->save_file = "ltcn.jpg";//Save to XX file $image->create ("linuxlaptop.jpg");//created from XX file */ /* +------------------------------ | Create thumbnails & watermark-like pictures +------------------------------ */ Class gimage{ var $input _type = ""; Enter the format of the picture var $output _type = "jpg"; Format of the output picture var $limit = 0; Picture size limit var $filename = ""; Enter the file name of the picture (it can also be the image data directly) var $jpeg _quality = 90; JPEG picture quality var $save _file = "; Output file name var $wm _text = ""; Watermark text (not supported in Chinese: ' () var $wm _size = 12; Watermark Text Size var $wm _angle = 0; Watermark Text Angle var $wm _x = 30; Watermark X Coordinate var $wm _y = 30; Watermark y-coordinate var $wm _color = "#cccccc"; Watermark Color var $wm _fontfile = "Geodesic.ttf";//Watermark font file function Create ($filename = "") { if ($filename) $this->filename = $filename; if (! $this->input_type) $this->get_type (); if (! $this->output_type) $this->output_type = $this->input_type; if ($this->input_type = = "jpg") $this->input_type = "jpeg"; if ($this->output_type = = "jpg") $this->output_type = "jpeg"; Switch ($this->input_type) { Case ' gif ': $src _img=imagecreatefromgif ($this->filename); Break Case ' JPEG ': $src _img=imagecreatefromjpeg ($this->filename); Break Case ' PNG ': $src _img=imagecreatefrompng ($this->filename); Break Default $src _img=imagecreatefromstring ($this->filename); Break } $src _w=imagesx ($src _img); $src _h=imagesy ($src _img); if ($src _w>= $src _h) { if ($src _w> $this->limit) { $new _w= $this->limit; $new _h= ($this->limit/$src _w) * $SRC _h; } } else{ if ($src _h> $this->limit) { $new _h= $this->limit; $new _w= ($this->limit/$src _h) * $SRC _w; } } if ($new _h) { $DST _img=imagecreatetruecolor ($new _w, $new _h); Imagecopyresampled ($dst _img, $src _img,0,0,0,0, $new _w, $new _h,imagesx ($src _img), Imagesy ($src _img)); } else{ $DST _img = $src _img; } if ($this->wm_text) { if (Preg_match ("/([a-f0-9][a-f0-9]) ([a-f0-9][a-f0-9]) ([a-f0-9][a-f0-9])/i", $this->wm_color, $color)) { $red = Hexdec ($color [1]); $green = Hexdec ($color [2]); $blue = Hexdec ($color [3]); } $WM _color = Imagecolorallocatealpha ($dst _img, $red, $green, $blue, 90); Imagettftext ($dst _img, $this->wm_size, $this->wm_angle, $this->wm_x, $this->wm_y, $wm _color, $this- Wm_fontfile, $this->wm_text); } if ($this->save_file) { Switch ($this->output_type) { Case ' gif ': $src _img=imagepng ($dst _img, $this->save_file); Break Case ' JPEG ': $src _img=imagejpeg ($dst _img, $this->save_file, $this->jpeg_quality); Break Case ' PNG ': $src _img=imagepng ($dst _img, $this->save_file); Break Default $src _img=imagejpeg ($dst _img, $this->save_file, $this->jpeg_quality); Break } } Else { Header ("Content-type:image/{$this->output_type}"); Switch ($this->output_type) { Case ' gif ': $src _img=imagepng ($dst _img); Break Case ' JPEG ': $src _img=imagejpeg ($dst _img, "", $this->jpeg_quality); Break Case ' PNG ': $src _img=imagepng ($dst _img); Break Default $src _img=imagejpeg ($dst _img, "", $this->jpeg_quality); Break } } Imagedestroy ($dst _img); } function Get_type ()//Get image file type { $name _array = Explode (".", $this->filename); if (Preg_match ("/\." ( Jpg|jpeg|gif|png) $/", $this->filename, $matches)) { $this->input_type = Strtolower ($matches [1]); } Else { $this->input_type = "string"; } } } Copy Code

