<?php class WaterImage extends Think {//类定义开始 private $font='./Public/fonts/msyh.ttf'; private $font_alpha='80'; private $title_option=array('literal'=>'默认标题水印文字','color'=>'#000000','pos_x'=>100,'pos_y'=>200,'size'=>14,'alpha'=>0,'font'=>'./Public/fonts/msyhbd.ttf');//默认title水印文字配置 private $content_option=array('literal'=>'默认正文水印文字','color'=>'#000000','pos_x'=>150,'pos_y'=>200,'size'=>12,'alpha'=>0,'font'=>'./Public/fonts/msyh.ttf');//默认title水印文字配置 private $img_option=array('pos_x'=>10,'pos_y'=>10, 'alpha'=>50);//默认水印图片配置 private $image='';//中间图 private $sourceImage='';//原图 private $sInfo='';//原图信息 private $waterImg='';//水印图片 private $contentLimt=25; //单行文字长度 private $contentMax=100; //正文最大文字长度 private $percent=1; //水印缩略比例大小 private $dateFormat = 'Ymd'; /** * 创建图片 */ public function createImg($image){ $info = $this->getImageInfo($image); //建立图像 $createFun = "imagecreatefrom".$info['type']; $image = $createFun($image); return $image ; } /** * 设置水印背景图片 * Enter description here ... * @param $sourceImage */ public function setSourceImage($sourceImage){ $this->sourceImage = $sourceImage; } /** * * 总的调用方式 * @param $data */ public function addWaterMark($sourceImage,$savename='',$imgOpt=array(),$literayOpt=array()){ if (!file_exists($sourceImage)) throw_exception('源图片不存在，不能添加水印！'); $this->setSourceImage($sourceImage); $this->sInfo = $this->getImageInfo($this->sourceImage); $this->image = $this->createImg($this->sourceImage); //添加图片水印 if (!empty($imgOpt)){ if (isset($imgOpt['waterImg'])){ $this->waterImg=$imgOpt['waterImg']; $waterImgOption=array_merge($this->img_option,$imgOpt['waterOpt']);//后面参数优先级高 $this->addWaterImg($waterImgOption);//添加图片水印 }else{ foreach ($imgOpt as $parameter){ $this->waterImg=$parameter['waterImg']; $waterImgOption=array_merge($this->img_option,$parameter['waterOpt']); $this->addWaterImg($waterImgOption);//添加图片水印 } } } //添加文字水印 if (!empty($literayOpt)){ if (isset($literayOpt['titileOpt'])||isset($literayOpt['contentOpt'])) $this->addTitileContent($literayOpt); else{ foreach ($literayOpt as $parameter){ $this->addTitileContent($parameter); } } } if ($savename!='') {//使用自定义的图片路径和文件名 $this->saveImg($savename); } else { $attachdir='./Public/Attachment/'; $savename=$this->getSaveName(); $this->saveImg($attachdir.$savename); } return $savename; } /** +---------------------------------------------------------- * 为图片添加图片水印 +---------------------------------------------------------- +---------------------------------------------------------- * @param string $source 原文件名 * @param mixed $water 水印图片array('img'=>'./1.jpg','pos_x'=>10,'pos_y'=>10, 'alpha'=>80) +---------------------------------------------------------- * @return mix +---------------------------------------------------------- * @throws ThinkExecption +---------------------------------------------------------- */ public function addWaterImg($data) { //检查文件是否存在 if (!file_exists($this->waterImg)) throw_exception('水印图片不存在！'); //图片信息 $wInfo = $this->getImageInfo($this->waterImg); //建立图像 $wImage = $this->createImg($this->waterImg); //设定图像的混色模式 imagealphablending($wImage, true); //#图像位置,默认为右下角右对齐,以后调整 $posY = $data['pos_y']; $posX =$data['pos_x']; //对水印图片缩略 if (!isset($data['newwidth'])&&!isset($data['newheight'])){//长宽都没设置，则按百分比 $data['newwidth'] = $wInfo["width"] * $this->percent; $data['newheight'] = $wInfo['height']* $this->percent; }elseif (!isset($data['newwidth'])){//没设置宽，则按长为准 $this->percent=$wInfo["width"] / $wInfo['height'];//宽长比 $data['newwidth'] = round($data['newheight'] * $this->percent,2); }elseif (!isset($data['newheight'])) {//没设置长，则按宽为准 $this->percent=$wInfo['height']/$wInfo["width"];//宽长比 $data['newheight'] = round($data['newwidth'] * $this->percent,2); } $thumb = imagecreatetruecolor( $data['newwidth'], $data['newheight']); $wImage = $this->createImg($this->waterImg); // Resize imagecopyresized($thumb, $wImage, 0, 0, 0, 0, $data['newwidth'], $data['newheight'], $wInfo["width"],$wInfo['height']); //生成混合图像，这是生成图片水印最关键的 imagecopymerge($this->image, $thumb, $posX, $posY, 0, 0, $data['newwidth'], $data['newheight'], $data['alpha']); imagedestroy($thumb); return $this->image; } /** * 分别给文字标题和内容加水印 * @param $data array( 'titileOpt'=>array('literal'=>'默认水印文字'), 'contentOpt'=>array(...) ) */ public function addTitileContent($data){ if (empty($data)) return ; if (isset($data['titileOpt'])){ $titileOpt=array_merge($this->title_option,$data['titileOpt']); $this->addWaterText($titileOpt); } if (isset($data['contentOpt'])){ $contentOpt=array_merge($this->content_option,$data['contentOpt']); $literalen=mb_strlen(trim($contentOpt['literal']),'utf-8');//获取文字长度 if ($literalen>$this->contentLimt){//文字水印超过了单行限制 if ($literalen>$this->contentMax) throw_exception('正文内容超过了最大文字长度限制：'.$this->contentMax); $literal=$this->phaseContent(trim($contentOpt['literal'])); foreach ($literal as $i=>$tring){ $contentOpt['literal']=$tring; if ($i==0) $this->addWaterText($contentOpt); else{ $contentOpt['pos_y']+=20; $this->addWaterText($contentOpt); } } }else $this->addWaterText($contentOpt); } } /** * * 分割字符串为数组 * @param unknown_type $string */ public function phaseContent($string){ import("ORG.Util.String"); $data=array(); $string_arr=explode("\n", $string);//必须用双引号 foreach ($string_arr as $value){ $lenth=mb_strlen(trim($value),'utf-8'); if($lenth>$this->contentLimt){ for ($i=0;$i<$lenth;$i+=$this->contentLimt){ $temp=String::msubstr(trim($value), $i, $this->contentLimt,'utf-8',false); array_push($data, $temp); } continue; } array_push($data, $value); } if (count($data)>4) array_splice($data, 4); return $data; } /** * *给图片添加文字 *文字水印 *@param array $data array(array('literal'=>'literal','color'=>'mixed','pos_x'=>10,'pos_y'=>10,'size'=>14,'alpha'=>80,'font'=>'mysh.ttf')) */ function addWaterText($data){ $c = $this->_parseColor($data['color']); $data['color'] = imagecolorallocatealpha($this->image, $c[0], $c[1], $c[2], $data['alpha']); imagettftext($this->image,$data['size'], 0, $data['pos_x'], $data['pos_y'], $data['color'], $data['font'],$data['literal']); return $this->image; } /** * * @param unknown_type $sourceImage 源图像路径 * @param unknown_type $sImage 通过函数产生的图像 * @param $savename 存储路径 */ function saveImg($savename){ //输出图像 $ImageFun = 'Image' . $this->sInfo['type']; //如果没有给出保存文件名，默认为原图像名 if (!$savename) { $savename = $this->sourceImage; @unlink($this->sourceImage); } //保存图像 $ImageFun($this->image, $savename); imagedestroy($this->image); } /** +---------------------------------------------------------- * 取得图像信息 * +---------------------------------------------------------- * @static * @access public +---------------------------------------------------------- * @param string $image 图像文件名 +---------------------------------------------------------- * @return mixed +---------------------------------------------------------- */ function getImageInfo($img) { $imageInfo = getimagesize($img); if ($imageInfo !== false) { $imageType = strtolower(substr(image_type_to_extension($imageInfo[2]), 1)); $imageSize = filesize($img); $info = array( "width" => $imageInfo[0], "height" => $imageInfo[1], "type" => $imageType, "size" => $imageSize, "mime" => $imageInfo['mime'] ); return $info; } else { return false; } } /** * 分析颜色 * * @param string $color 十六进制颜色 */ private function _parseColor($color) { $arr = array(); for($ii=1; $ii<strlen($color); $ii++) { $arr[] = hexdec(substr($color,$ii,2)); $ii++; } Return $arr; } private function getSaveName() { $md5=md5(mktime().rand()); $name=substr($md5, 0,13); $saveName=$name.'.'.$this->sInfo['type']; $saveName = $this->getDirName().'/'.$saveName; return $saveName; } /** +---------------------------------------------------------- * 获取子目录的名称 */ private function getDirName() { $attachdir='./Public/Attachment/'; $dir = date($this->dateFormat,time()); if(!is_dir($attachdir.$dir)) { mk_dir($attachdir.$dir); } return $dir; } }
写的过程还是比较简单的，主要注意字体路径要对，图片路径必须是绝对路径，从磁盘开始的。
放在TP框架里面的，可以独立拿出来使用，优惠券的字断行不好处理。
使用案例：
$water=APP_PATH .'/Public/images/homelogo.jpg'; //水印图 $active='./Public/Attachment/'.$_POST['activeimg']; if (!file_exists($active)) throw_exception('商家上传图片不存在，不能添加水印！'); $watermark=new WaterImage(); $timest = strtotime("+".$_POST['validaynum']." days",time()); // 30天后的时间戳 $date=date("Y-m-d",$timest); // 格式化日期 //设置具体图片参数 $imgOpt[]=array('waterImg'=>$water,'waterOpt'=>array('pos_x'=>0,'pos_y'=>0, 'alpha'=>80));//添加logo $imgOpt[]=array('waterImg'=>$active,'waterOpt'=>array('pos_x'=>120,'pos_y'=>160, 'alpha'=>80,'newwidth'=>280,'newheight'=>170));//添加中间的活动图片 $literayOpt=array(//文字水印参数，可以为一维数组，可选 array( 'titileOpt'=>array('literal'=>'详 情:','pos_x'=>40,'pos_y'=>380,'size'=>12), 'contentOpt'=>array('literal'=>$_POST['Details'],'pos_x'=>120,'pos_y'=>380,'size'=>10) ), array( 'titileOpt'=>array('literal'=>'店 名:','pos_x'=>40,'pos_y'=>455,'size'=>12), 'contentOpt'=>array('literal'=>$refectoryInfo['refectory_name'],'pos_x'=>120,'pos_y'=>455,'size'=>10) ), array( 'titileOpt'=>array('literal'=>'地 址:','pos_x'=>40,'pos_y'=>480,'size'=>12), 'contentOpt'=>array('literal'=>$refectoryInfo['refectory_address'],'pos_x'=>120,'pos_y'=>480,'size'=>10) ), array( 'titileOpt'=>array('literal'=>'电 话:','pos_x'=>40,'pos_y'=>505,'size'=>12), 'contentOpt'=>array('literal'=>$refectoryInfo['bespeak_meal'],'pos_x'=>120,'pos_y'=>505,'size'=>10) ), array( 'titileOpt'=>array('literal'=>'有效期至:','pos_x'=>40,'pos_y'=>530,'size'=>12), 'contentOpt'=>array('literal'=>$date,'pos_x'=>120,'pos_y'=>530,'size'=>10) ) ); if ($_POST['type_coupon']==2){ $literayOpt[]=array( 'contentOpt'=>array('literal'=>$_POST['discount'].' 折优惠','pos_x'=>150,'pos_y'=>120,'size'=>40,'color'=>'#CB1B0D','font'=>'./Public/fonts/STXINGKA.TTF') ); } if ($_POST['type_coupon']==1){ $literayOpt[]=array( 'contentOpt'=>array('literal'=>'立减 '.$_POST['discount'].'元','pos_x'=>150,'pos_y'=>120,'size'=>40,'color'=>'#CB1B0D','font'=>'./Public/fonts/STXINGKA.TTF') ); } //添加水印 $watername =$watermark->addWaterMark($imgTemplate,'',$imgOpt,$literayOpt);