ImageWatermark.php
<?php/***********************************************************类名：ImageWatermark功能：用于生成图片或文字水印WDPHP素材源码 http://www.wdphp.com************************************************************合成水印：1、图像水印appendImageMark(暂不可旋转)2、文字水印appendTextMark(汉字水印需要设置汉字字体)（可旋转）输出水印图像：write($filename=null)1、输出到文件：指定$filename参数为输出的文件名。2、输出到浏览器：不指定输出文件名，则输出到浏览器.指定水印位置：1、指定位置类型$markPosType:(default-0)1-top left ????2-top center ????3-top right4-middle left ?5-middle center ?6-middle right7-bottom left ?8-bottom center ?9-bottom right0-random2、设置具体位置setMarkPos($x,$y)，若指定具体位置，则上面的位置类型无效。*************************************************************/class ImageWatermark { ???public $markPosType = 0; //水印位置，缺省为随机位置输出水印 ???public $fontFile = ‘arial.ttf‘; //字体文件名 ???public $color = ‘#CCCCCC‘; //水印字体的颜色 ???public $fontSize = 12; //水印字体大小 ???public $angle = 0; //水印文字旋转的角度 ???private $markPos = array(); ???private $markImageFile = null, $destImageFile = null; ???private $mark_res = null, $mark_width = 0, $mark_height = 0, $mark_type = null; ???private $dest_res = null, $dest_width = 0, $dest_height = 0, $dest_type = null; ???//用目标图片作为构造函数的参数 ???public function __construct($destImage) { ???????if (!file_exists($destImage)) return false; ???????$this->destImageFile = $destImage; ???????//获取图片大小、类型 ???????$imageInfo = getimagesize($this->destImageFile); ???????$this->dest_width = $imageInfo[0]; ???????$this->dest_height = $imageInfo[1]; ???????$this->dest_type = $imageInfo[2]; ???????//得到图片资源句柄 ???????$this->dest_res = $this->getImageResource($this->destImageFile, $this->dest_type); ???} ???public function __destruct() { ???????imagedestroy($this->dest_res); ???} ???//添加文字水印 ???public function appendTextMark($markText) { ???????if ($markText == null) return false; ???????//计算水印文本的大小 ???????$box = imagettfbbox($this->fontSize, $this->angle, $this->fontFile, $markText); ???????$this->mark_width = $box[2] - $box[6]; ???????$this->mark_height = $box[3] - $box[7]; ???????//计算水印位置 ???????$pos = ($this->markPos != null) ? $this->markPos : $this->getMarkPosition($this->markPosType); ???????$pos[1]+= $this->mark_height; ???????//将文字打印到图片上 ???????$RGB = $this->colorHexRgb($this->color); ???????$imageColor = imagecolorallocate($this->dest_res, $RGB[0], $RGB[1], $RGB[2]); ???????imagettftext($this->dest_res, $this->fontSize, $this->angle, $pos[0], $pos[1], $imageColor, $this->fontFile, $markText); ???} ???//添加图片水印 ???public function appendImageMark($markImage) { ???????if (!file_exists($markImage)) return false; ???????$this->markImageFile = $markImage; ???????//获取水印图片大小、类型 ???????$imageInfo = getimagesize($this->markImageFile); ???????$this->mark_width = $imageInfo[0]; ???????$this->mark_height = $imageInfo[1]; ???????$this->mark_type = $imageInfo[2]; ???????//得到图片资源句柄 ???????$this->mark_res = $this->getImageResource($this->markImageFile, $this->mark_type); ???????//计算水印位置 ???????$pos = ($this->markPos != null) ? $this->markPos : $this->getMarkPosition($this->markPosType); ???????//设置图像混色模式 ???????imagealphablending($this->dest_res, true); ???????//复制叠加图像 ???????imagecopy($this->dest_res, $this->mark_res, $pos[0], $pos[1], 0, 0, $this->mark_width, $this->mark_height); ???????imagedestroy($this->mark_res); ???} ???//将叠加水印后的图片写入指定文件，若不定文件名，则输出到浏览器 ???public function write($filename = null) { ???????$this->writeImage($this->dest_res, $filename, $this->dest_type); ???} ???//设置水印x,y坐标 ???public function setMarkPos($x, $y) { ???????$this->markPos[0] = $x; ???????$this->markPos[1] = $y; ???} ???//将十六进制的颜色值分解成RGB形式 ???private function colorHexRgb($color) { ???????$color = preg_replace(‘/#/‘, ‘‘, $color); ???????$R = hexdec($color[0] . $color[1]); ???????$G = hexdec($color[2] . $color[3]); ???????$B = hexdec($color[4] . $color[5]); ???????return array( ???????????$R, ???????????$G, ???????????$B ???????); ???} ???//计算水印位置 ???private function getMarkPosition($type = 0) { ???????switch ($type) { ???????????case 0: ???????????????$x = rand(0, $this->dest_width - $this->mark_width); ???????????????$y = rand(0, $this->dest_height - $this->mark_height); ???????????????break; //random ???????????????????????????case 1: ???????????????$x = 0; ???????????????$y = 0; ???????????????break; //topleft ???????????????????????????case 2: ???????????????$x = ($this->dest_width - $this->mark_width) / 2; ???????????????$y = 0; ???????????????break; //topcenter ???????????????????????????case 3: ???????????????$x = $this->dest_width - $this->mark_width; ???????????????$y = 0; ???????????????break; // topright ???????????????????????????case 4: ???????????????$x = 0; ???????????????$y = ($this->dest_height - $this->mark_height) / 2; ???????????????break; //middleleft ???????????????????????????case 5: ???????????????$x = ($this->dest_width - $this->mark_width) / 2; ???????????????$y = ($this->dest_height - $this->mark_height) / 2; ???????????????break; //middlecenter ???????????????????????????case 6: ???????????????$x = $this->dest_width - $this->mark_width; ???????????????$y = ($this->dest_height - $this->mark_height) / 2; ???????????????break; //middleright ???????????????????????????case 7: ???????????????$x = 0; ???????????????$y = $this->dest_height - $this->mark_height; ???????????????break; //bottomleft ???????????????????????????case 8: ???????????????$x = ($this->dest_width - $this->mark_width) / 2; ???????????????$y = $this->dest_height - $this->mark_height; ???????????????break; //bottomcenter ???????????????????????????case 9: ???????????????$x = $this->dest_width - $this->mark_width; ???????????????$y = $this->dest_height - $this->mark_height; ???????????????break; //bottomright ???????????????????????????default: ???????????????$x = rand(0, $this->dest_width - $this->mark_width); ???????????????$y = rand(0, $this->dest_height - $this->mark_height); ???????????????break; //random ???????????????????????} ???????return array( ???????????$x, ???????????$y ???????); ???} ???//从一个图像文件中取得图片资源标识符 ???private function getImageResource($filename, $type = 0) { ???????switch ($type) { ???????????case 1: ???????????????return imagecreatefromgif($filename); ???????????????break; ???????????case 2: ???????????????return imagecreatefromjpeg($filename); ???????????????break; ???????????case 3: ???????????????return imagecreatefrompng($filename); ???????????????break; ???????????????// 以后可添加其它格式 ???????????????????????????default: ???????????????return null; ???????} ???} ???//将图像写入文件或输出到浏览器 ???private function writeImage($ImageRes, $filename = null, $type = 0) { ???????switch ($type) { ???????????case 1: ???????????????imagegif($ImageRes, $filename); ???????????????break; ???????????case 2: ???????????????imagejpeg($ImageRes, $filename); ???????????????break; ???????????case 3: ???????????????imagepng($ImageRes, $filename); ???????????????break; ???????????default: ???????????????return null; ???????} ???????return true; ???}}//使用示例$markimg = new ImageWatermark(‘c_si.jpg‘);//$markimg->setMarkPos(100,200);//如何设置setMarkPos,则markPosType无效。$markimg->markPosType = 5;$markimg->appendImageMark(‘mark.png‘);$markimg->fontFile = ‘STCAIYUN.TTF‘;$markimg->color = ‘#FFFFFF‘;$markimg->fontSize = 24;$markimg->angle = 45; //设置角度时，注意水印可能旋转出目标图片之外。$markimg->appendTextMark(‘汉字水印‘);$markimg->write();$markimg = null;?>PHP的生成图片或文字水印的类
原文地址：https://www.cnblogs.com/lovellll/p/10200535.html