php图像处理类实例

2020-03-22 20:32:19

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private function createSrcImage () { $this- imageResource = $this- createImageFromFile(); * 跟据文件创建图像GD 资源 * @param string $fileName 文件名 * @return gd resource html' target='_blank'>public function createImageFromFile($fileName = NULL) if (!$fileName) { $fileName = $this- fileName; $imgType = $this- imageType; if (!is_readable($fileName) || !file_exists($fileName)) { throw new Exception('Unable to open file "' . $fileName . '"'); if (!$imgType) { $imageInfo = $this- getImageInfo($fileName); $imgType = $imageInfo[2]; switch ($imgType) { case IMAGETYPE_GIF: $tempResource = imagecreatefromgif($fileName); break; case IMAGETYPE_JPEG: $tempResource = imagecreatefromjpeg($fileName); break; case IMAGETYPE_PNG: $tempResource = imagecreatefrompng($fileName); break; case IMAGETYPE_WBMP: $tempResource = imagecreatefromwbmp($fileName); break; case IMAGETYPE_XBM: $tempResource = imagecreatefromxbm($fileName); break; default: throw new Exception('Unsupport image type'); return $tempResource; * 改变图像大小 * @param int $width 宽 * @param int $height 高 * @param string $flag 一般而言,允许截图则用4,不允许截图则用1; 假设要求一个为4:3比例的图像,则:4=如果太长则自动刪除一部分 0=长宽转换成参数指定的 1=按比例缩放,自动判断太长还是太宽,长宽约束在参数指定内 2=以宽为约束缩放 3=以高为约束缩放 * @param string $bgcolor 如果不为null,则用这个参数指定的颜色作为背景色,并且图像扩充到指定高宽,该参数应该是一个数组; * @return string public function resizeImage($width, $height, $flag=1, $bgcolor=null) { $widthRatio = $width/$this- imageWidth; $heightRatio = $height/$this- imageHeight; switch ($flag) { case 1: if ($this- imageHeight $height && $this- imageWidth $width) { $endWidth = $this- imageWidth; $endHeight = $this- imageHeight; //return; } elseif (($this- imageHeight * $widthRatio) $height) { $endWidth = ceil($this- imageWidth * $heightRatio); $endHeight = $height; } else { $endWidth = $width; $endHeight = ceil($this- imageHeight * $widthRatio); break; case 2: $endWidth = $width; $endHeight = ceil($this- imageHeight * $widthRatio); break; case 3: $endWidth = ceil($this- imageWidth * $heightRatio); $endHeight = $height; break; case 4: $endWidth2 = $width; $endHeight2 = $height; if ($this- imageHeight $height && $this- imageWidth $width) { $endWidth = $this- imageWidth; $endHeight = $this- imageHeight; //return; } elseif (($this- imageHeight * $widthRatio) $height) { $endWidth = ceil($this- imageWidth * $heightRatio); $endHeight = $height; } else { $endWidth = $width; $endHeight = ceil($this- imageHeight * $widthRatio); break; default: $endWidth = $width; $endHeight = $height; break; if ($this- imageResource==NULL) { $this- createSrcImage(); if($bgcolor){ $this- newResource = imagecreatetruecolor($width,$height); $bg=ImageColorAllocate($this- newResource,$bgcolor[0],$bgcolor[1],$bgcolor[2]); ImageFilledRectangle($this- newResource,0,0,$width,$height,$bg); $tox=ceil(($width-$endWidth)/2); $toy=ceil(($height-$endHeight)/2); if($tox 0) $tox=0; if($toy 0) $toy=0; }else if ($flag==4) { $this- newResource = imagecreatetruecolor($endWidth2,$endHeight2); }else { $this- newResource = imagecreatetruecolor($endWidth,$endHeight); $this- newResType = $this- imageType; imagecopyresampled($this- newResource, $this- imageResource, $tox, $toy, 0, 0, $endWidth, $endHeight,$this- imageWidth,$this- imageHeight); * 给图像加水印 * @param string $waterContent 水印内容可以是图像文件名，也可以是文字 * @param int $pos 位置0-9可以是数组 * @param int $textFont 字体大字，当水印内容是文字时有效 * @param string $textColor 文字颜色，当水印内容是文字时有效 * @return string public function waterMark($waterContent, $pos = 0, $textFont=5, $textColor="#ffffff") { $isWaterImage = file_exists($waterContent); if ($isWaterImage) { $waterImgRes = $this- createImageFromFile($waterContent); $waterImgInfo = $this- getImageInfo($waterContent); $waterWidth = $waterImgInfo[0]; $waterHeight = $waterImgInfo[1]; } else { $waterText = $waterContent; //$temp = @imagettfbbox(ceil($textFont*2.5),0,"./cour.ttf",$waterContent); if ($temp) { $waterWidth = $temp[2]-$temp[6]; $waterHeight = $temp[3]-$temp[7]; } else { $waterWidth = 100; $waterHeight = 12; if ($this- imageResource==NULL) { $this- createSrcImage(); switch($pos) case 0://随机 $posX = rand(0,($this- imageWidth - $waterWidth)); $posY = rand(0,($this- imageHeight - $waterHeight)); break; case 1://1为顶端居左 $posX = 0; $posY = 0; break; case 2://2为顶端居中 $posX = ($this- imageWidth - $waterWidth) / 2; $posY = 0; break; case 3://3为顶端居右 $posX = $this- imageWidth - $waterWidth; $posY = 0; break; case 4://4为中部居左 $posX = 0; $posY = ($this- imageHeight - $waterHeight) / 2; break; case 5://5为中部居中 $posX = ($this- imageWidth - $waterWidth) / 2; $posY = ($this- imageHeight - $waterHeight) / 2; break; case 6://6为中部居右 $posX = $this- imageWidth - $waterWidth; $posY = ($this- imageHeight - $waterHeight) / 2; break; case 7://7为底端居左 $posX = 0; $posY = $this- imageHeight - $waterHeight; break; case 8://8为底端居中 $posX = ($this- imageWidth - $waterWidth) / 2; $posY = $this- imageHeight - $waterHeight; break; case 9://9为底端居右 $posX = $this- imageWidth - $waterWidth-20; $posY = $this- imageHeight - $waterHeight-10; break; default://随机 $posX = rand(0,($this- imageWidth - $waterWidth)); $posY = rand(0,($this- imageHeight - $waterHeight)); break; imagealphablending($this- imageResource, true); if($isWaterImage) { imagecopy($this- imageResource, $waterImgRes, $posX, $posY, 0, 0, $waterWidth,$waterHeight); } else { $R = hexdec(substr($textColor,1,2)); $G = hexdec(substr($textColor,3,2)); $B = hexdec(substr($textColor,5)); $textColor = imagecolorallocate($this- imageResource, $R, $G, $B); imagestring ($this- imageResource, $textFont, $posX, $posY, $waterText, $textColor); $this- newResource = $this- imageResource; $this- newResType = $this- imageType; * 生成验证码图片 * @param int $width 宽 * @param string $height 高 * @param int $length 长度 * @param int $validType 0=数字,1=字母,2=数字加字母 * @param string $textColor 文字颜色 * @param string $backgroundColor 背景颜色 * @return void public function imageValidate($width, $height, $length = 4, $validType = 1, $textColor = '#000000', $backgroundColor = '#ffffff') { if ($validType==1) { $validString = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $validLength = 52; } elseif ($validType==2) { $validString = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $validLength = 62; } else { $validString = '123456789'; $validLength = 9; srand((int)time()); $valid = ''; for ($i=0; $i $length; $i++) { $valid .= $validString{rand(0, $validLength-1)}; $this- newResource = imagecreate($width,$height); $bgR = hexdec(substr($backgroundColor,1,2)); $bgG = hexdec(substr($backgroundColor,3,2)); $bgB = hexdec(substr($backgroundColor,5,2)); $backgroundColor = imagecolorallocate($this- newResource, $bgR, $bgG, $bgB); $tR = hexdec(substr($textColor,1,2)); $tG = hexdec(substr($textColor,3,2)); $tB = hexdec(substr($textColor,5,2)); $textColor = imagecolorallocate($this- newResource, $tR, $tG, $tB); for ($i=0;$i strlen($valid);$i++){ imagestring($this- newResource,5,$i*$width/$length+3,2, $valid[$i],$textColor); $this- newResType = IMAGETYPE_JPEG; return $valid; * 显示输出图像 * @return void public function display($fileName='', $quality=100) { $imgType = $this- newResType; $imageSrc = $this- newResource; switch ($imgType) { case IMAGETYPE_GIF: if ($fileName=='') { header('Content-type: image/gif'); imagegif($imageSrc, $fileName, $quality); break; case IMAGETYPE_JPEG: if ($fileName=='') { header('Content-type: image/jpeg'); imagejpeg($imageSrc, $fileName, $quality); break; case IMAGETYPE_PNG: if ($fileName=='') { header('Content-type: image/png'); imagepng($imageSrc); } else { imagepng($imageSrc, $fileName); break; case IMAGETYPE_WBMP: if ($fileName=='') { header('Content-type: image/wbmp'); imagewbmp($imageSrc, $fileName, $quality); break; case IMAGETYPE_XBM: if ($fileName=='') { header('Content-type: image/xbm'); imagexbm($imageSrc, $fileName, $quality); break; default: throw new Exception('Unsupport image type'); imagedestroy($imageSrc); * 保存图像 * @param int $fileNameType 文件名类型 0使用原文件名，1使用指定的文件名，2在原文件名加上后缀，3产生随机文件名 * @param string $folder 文件夹路径为空为与原文件相同 * @param string $param 参数$fileNameType为1时为文件名2时为后缀 * @return void public function save($fileNameType = 0, $folder = NULL, $param = '_miniature') { if ($folder==NULL) { $folder = dirname($this- fileName).DIRECTORY_SEPARATOR; $fileExtName = FileSystem::fileExt($this- fileName, true); $fileBesicName = FileSystem::getBasicName($this- fileName, false); switch ($fileNameType) { case 1: $newFileName = $folder.$param; break; case 2: $newFileName = $folder.$fileBesicName.$param.$fileExtName; break; case 3: $tmp = date('YmdHis'); $fileBesicName = $tmp; $i = 0; while (file_exists($folder.$fileBesicName.$fileExtName)) { $fileBesicName = $tmp.$i; $i++; $newFileName = $folder.$fileBesicName.$fileExtName; break; default: $newFileName = $this- fileName; break; $this- display($newFileName); return $newFileName; 希望本文所述对大家的php程序设计有所帮助。PHP教程

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