php類庫給現有的圖片加文字水印,代碼不是很完善,歡迎大家多多指教!代碼如下:
<?php /*PHP圖片加文字水印類庫 QQ:3697578482 傷心的歌 該類庫暫時只支持文字水印,位置為右下角,顏色隨機 調用方法: 1、在需要加水印的文件頂部引入類庫: include_once 'imageClass.php'; 2、聲明新類: $tpl=new image_fu; 3、給圖片水印提供參數: $tpl->img(圖片路徑,水印文字,字體路徑,字體大小,字體角度); 比如:$tpl->img('abc.jpg','這是水印文字','ziti.ttf',30,0) */ 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)){//檢測圖片是否存在 $this->image =$img; $this->img_text=$txt; $this->img_text_size=$size; $this->img_jd=$jiaodu; if(file_exists($ttf)){ $this->img_ttf=$ttf; }else{ exit('字體文件:'.$ttf.'不存在!'); } $this->imgyesno(); }else{ exit('圖片文件:'.$img.'不存在'); } } private function imgyesno(){ $this->img_info =getimagesize($this->image); $this->img_width =$this->img_info[0];//圖片寬 $this->img_height=$this->img_info[1];//圖片高 //檢測圖片類型 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('圖片格式不支持水印'); } $this->img_text(); } private function img_text(){ imagealphablending($this->img_im,true); //設定顏色 $color=imagecolorallocate($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);//刪除圖片 switch($this->img_info[2]) {//取得背景圖片的格式 case 1:imagegif($this->img_im,$this->image);break; case 2:imagejpeg($this->img_im,$this->image);break; case 3:imagepng($this->img_im,$this->image);break; default: exit('水印圖片失敗'); } } //顯示圖片 function img_show(){echo '<img src="'.$this->image.'" border="0" alt="'.$this->img_text.'" />';} //釋放內存 private function img_nothing(){ unset($this->img_info); imagedestroy($this->img_im); } } ?>
以上就是本文的全部內容,希望對大家的學習有所幫助。