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用到的函数
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//imagecopy //1,2水印图和原图资源 //3,4 水印图的起始点坐标 //5,6 原图的起始点坐标 //7,8 宽高 //9 透明度 (0-100) imagecopymerge($img , $water, $x, $y, 0, 0, $water_w, $water_h, 50); |
案例
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<?php header("content-type:text/html;chsrset=urf-8"); date_default_timezone_set("PRC"); function picMark ($src_img, $water_img, $postion=1) { //获取原图信息 $srcinfo = getimagesize($src_img); //水印图信息 $waterinfo = getimagesize($water_img); //判断 if (!$srcinfo || !$waterinfo) { echo "非法图片"; return false; } //得到原图和水印图宽高 list($src_w, $src_h) = $srcinfo; list($water_w, $water_h) = $waterinfo; if (($water_w > $src_w) || ($water_h > $src_h)) { echo "水印图过大"; return false; } list($src_type, $src_subtype) = explode('/', $srcinfo['mime']); list($water_type, $water_subtype) = explode('/', $waterinfo['mime']); //生成打开函数的名称 $open_src = 'imagecreatefrom'.$src_subtype; $open_water = 'imagecreatefrom'.$water_subtype; //保存图片的函数名 $save_img = 'image'.$src_subtype; //水印位置 switch ($postion) { case 1: $x = 0; $y = 0; break; case 2: $x = $src_w /2 - $water_w/2; $y = 0; break; default: break; } //打开图片资源 $img = $open_src($src_img); $water = $open_water($water_img); imagecopymerge($img , $water, $x, $y, 0, 0, $water_w, $water_h, 50); $ext = pathinfo($src_img, PATHINFO_EXTENSION); //生成保存路径 $save_img_name = './cut/'.date('YmdHis').uniqid().'.'.$ext; //保存图片 $save_img($img, $save_img_name); //关闭 imagedestroy($img); imagedestroy($water); return $save_img_name; } echo picMark('./imgs/01.png', './imgs/qq.png',1); |
