非常强大的php图片处理类，可以自定义图片水印、透明度、图片缩放、图片锐化、图片旋转、图片翻转、图片剪切、图片反色。具体代码如下：
<p><?php</p>/**<br /> * 图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色<br /> * 处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步<br /> * 网址：http://www.scutephp.com<br /> */<br />class picture{<br /> var $PICTURE_URL; //要处理的图片<br /> var $DEST_URL = "temp__01.jpg"; //生成目标图片位置<br /> var $PICTURE_CREATE; //要创建的图片<br /> var $TURE_COLOR; //新建一个真彩图象<br /> <br /> <br /> var $PICTURE_WIDTH; //原图片宽度<br /> var $PICTURE_HEIGHT; //原图片高度<br /> <br /> <br /> /**<br /> * 水印的类型，默认的为水印文字<br /> */<br /> var $MARK_TYPE = 1;<br /> var $WORD; //经过UTF-8后的文字<br /> var $WORD_X; //文字横坐标<br /> var $WORD_Y; //文字纵坐标<br /> var $FONT_TYPE; //字体类型<br /> var $FONT_SIZE = "12"; //字体大小<br /> var $FONT_WORD; //文字<br /> var $ANGLE = 0; //文字的角度，默认为0<br /> var $FONT_COLOR = "#000000"; //文字颜色<br /> var $FONT_PATH = "font/simkai.ttf"; //字体库，默认为宋体<br /> var $FORCE_URL; //水印图片<br /> var $FORCE_X = 0; //水印横坐标<br /> var $FORCE_Y = 0; //水印纵坐标<br /> var $FORCE_START_X = 0; //切起水印的图片横坐标<br /> var $FORCE_START_Y = 0; //切起水印的图片纵坐标<br /> <br /> <br /> var $PICTURE_TYPE; //图片类型<br /> var $PICTURE_MIME; //输出的头部<br /> <br /> <br /> /**<br /> * 缩放比例为1的话就按缩放高度和宽度缩放<br /> */<br /> var $ZOOM = 1; //缩放类型<br /> var $ZOOM_MULTIPLE; //缩放比例<br /> var $ZOOM_WIDTH; //缩放宽度<br /> var $ZOOM_HEIGHT; //缩放高度<br /> <br /> <br /> /**<br /> * 裁切，按比例和固定长度、宽度<br /> */<br /> var $CUT_TYPE = 1; //裁切类型<br /> var $CUT_X = 0; //裁切的横坐标<br /> var $CUT_Y = 0; //裁切的纵坐标<br /> var $CUT_WIDTH = 100; //裁切的宽度<br /> var $CUT_HEIGHT = 100; //裁切的高度<br /> <br /> <br /> /**<br /> * 锐化<br /> */<br /> var $SHARP = "7.0"; //锐化程度<br /> <br /> <br /> /**<br /> * 透明度处理<br /> */<br /> var $ALPHA = '100'; //透明度在0-127之间<br /> var $ALPHA_X = "90";<br /> var $ALPHA_Y = "50";<br /> <br /> /**<br /> * 任意角度旋转<br /> */<br /> var $CIRCUMROTATE = "90.0"; //注意，必须为浮点数<br /> <br /> <br /> /**<br /> * 出错信息<br /> */<br /> var $ERROR = array(<br /> 'unalviable' => '没有找到相关图片!'<br /> );<br /> <br /> /**<br /> * 构造函数：函数初始化<br /> */<br /> function __construct($PICTURE_URL){<br /> <br /> $this -> get_info($PICTURE_URL);<br /> <br /> }<br /> function get_info($PICTURE_URL){<br /> /**<br /> * 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息<br /> */<br /> @$SIZE = getimagesize($PICTURE_URL);<br /> if(!$SIZE){<br /> exit($this -> ERROR['unalviable']);<br /> }<br /> <br /> // 得到原图片的信息类型、宽度、高度<br /> $this -> PICTURE_MIME = $SIZE['mime'];<br /> $this -> PICTURE_WIDTH = $SIZE[0];<br /> $this -> PICTURE_HEIGHT = $SIZE[1];<br /> <br /> // 创建图片<br /> switch($SIZE[2]){<br /> case 1:<br /> $this -> PICTURE_CREATE = imagecreatefromgif($PICTURE_URL);<br /> $this -> PICTURE_TYPE = "imagejpeg";<br /> $this -> PICTURE_EXT = "jpg";<br /> break;<br /> case 2:<br /> $this -> PICTURE_CREATE = imagecreatefromjpeg($PICTURE_URL);<br /> $this -> PICTURE_TYPE = "imagegif";<br /> $this -> PICTURE_EXT = "gif";<br /> break;<br /> case 3:<br /> $this -> PICTURE_CREATE = imagecreatefrompng($PICTURE_URL);<br /> $this -> PICTURE_TYPE = "imagepng";<br /> $this -> PICTURE_EXT = "png";<br /> break;<br /> }<br /> <br /> /**<br /> * 文字颜色转换16进制转换成10进制<br /> */<br /> preg_match_all("/([0-f]){2,2}/i", $this -> FONT_COLOR, $MATCHES);<br /> if(count($MATCHES) == 3){<br /> $this -> RED = hexdec($MATCHES[0][0]);<br /> $this -> GREEN = hexdec($MATCHES[0][1]);<br /> $this -> BLUE = hexdec($MATCHES[0][2]);<br /> }<br /> }<br /><br /> # end of __construct<br />/**<br /> * 将16进制的颜色转换成10进制的（R，G，B）<br /> */<br />function hex2dec(){<br /> preg_match_all("/([0-f]){2,2}/i", $this -> FONT_COLOR, $MATCHES);<br /> if(count($MATCHES) == 3){<br /> $this -> RED = hexdec($MATCHES[0][0]);<br /> $this -> GREEN = hexdec($MATCHES[0][1]);<br /> $this -> BLUE = hexdec($MATCHES[0][2]);<br /> }<br /> }<br /><br /> // 缩放类型<br />function zoom_type($ZOOM_TYPE){<br /> $this -> ZOOM = $ZOOM_TYPE;<br /> }<br /><br /> // 对图片进行缩放,如果不指定高度和宽度就进行缩放<br />function zoom(){<br /> // 缩放的大小<br /> if($this -> ZOOM == 0){<br /> $this -> ZOOM_WIDTH = $this -> PICTURE_WIDTH * $this -> ZOOM_MULTIPLE;<br /> $this -> ZOOM_HEIGHT = $this -> PICTURE_HEIGHT * $this -> ZOOM_MULTIPLE;<br /> }<br /> // 新建一个真彩图象<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT);<br /> $WHITE = imagecolorallocate($this -> TRUE_COLOR, 255, 255, 255);<br /> imagefilledrectangle($this -> TRUE_COLOR, 0, 0, $this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT, $WHITE);<br /> imagecopyresized($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> }<br /><br /> # end of zoom<br />// 裁切图片,按坐标或自动<br />function cut(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> CUT_WIDTH, $this -> CUT_WIDTH);<br /> imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, $this -> CUT_X, $this -> CUT_Y, $this -> CUT_WIDTH, $this -> CUT_HEIGHT);<br /> }<br /><br /> # end of cut<br />/**<br /> * 在图片上放文字或图片<br /> * 水印文字<br /> */<br />function _mark_text(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $this -> WORD = mb_convert_encoding($this -> FONT_WORD, 'utf-8', 'gb2312');<br /> /**<br /> * 取得使用 TrueType 字体的文本的范围<br /> */<br /> $TEMP = imagettfbbox($this -> FONT_SIZE, 0, $this -> FONT_PATH, $this -> WORD);<br /> $WORD_LENGTH = strlen($this -> WORD);<br /> $WORD_WIDTH = $TEMP[2] - $TEMP[6];<br /> $WORD_HEIGHT = $TEMP[3] - $TEMP[7];<br /> /**<br /> * 文字水印的默认位置为右下角<br /> */<br /> if($this -> WORD_X == ""){<br /> $this -> WORD_X = $this -> PICTURE_WIDTH - $WORD_WIDTH;<br /> }<br /> if($this -> WORD_Y == ""){<br /> $this -> WORD_Y = $this -> PICTURE_HEIGHT - $WORD_HEIGHT;<br /> }<br /> imagesettile($this -> TRUE_COLOR, $this -> PICTURE_CREATE);<br /> imagefilledrectangle($this -> TRUE_COLOR, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT, IMG_COLOR_TILED);<br /> $TEXT2 = imagecolorallocate($this -> TRUE_COLOR, $this -> RED, $this -> GREEN, $this -> Blue);<br /> imagettftext($this -> TRUE_COLOR, $this -> FONT_SIZE, $this -> ANGLE, $this -> WORD_X, $this -> WORD_Y, $TEXT2, $this -> FONT_PATH, $this -> WORD);<br /> }<br /><br />/**<br /> * 水印图片<br /> */<br /> function _mark_picture(){<br /> <br /> /**<br /> * 获取水印图片的信息<br /> */<br /> @$SIZE = getimagesize($this -> FORCE_URL);<br /> if(!$SIZE){<br /> exit($this -> ERROR['unalviable']);<br /> }<br /> $FORCE_PICTURE_WIDTH = $SIZE[0];<br /> $FORCE_PICTURE_HEIGHT = $SIZE[1];<br /> // 创建水印图片<br /> switch($SIZE[2]){<br /> case 1:<br /> $FORCE_PICTURE_CREATE = imagecreatefromgif($this -> FORCE_URL);<br /> $FORCE_PICTURE_TYPE = "gif";<br /> break;<br /> case 2:<br /> $FORCE_PICTURE_CREATE = imagecreatefromjpeg($this -> FORCE_URL);<br /> $FORCE_PICTURE_TYPE = "jpg";<br /> break;<br /> case 3:<br /> $FORCE_PICTURE_CREATE = imagecreatefrompng($this -> FORCE_URL);<br /> $FORCE_PICTURE_TYPE = "png";<br /> break;<br /> }<br /> /**<br /> * 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。<br /> */<br /> $this -> NEW_PICTURE = $this -> PICTURE_CREATE;<br /> if($FORCE_PICTURE_WIDTH > $this -> PICTURE_WIDTH){<br /> $CREATE_WIDTH = $FORCE_PICTURE_WIDTH - $this -> FORCE_START_X;<br /> }else{<br /> $CREATE_WIDTH = $this -> PICTURE_WIDTH;<br /> }<br /> if($FORCE_PICTURE_HEIGHT > $this -> PICTURE_HEIGHT){<br /> $CREATE_HEIGHT = $FORCE_PICTURE_HEIGHT - $this -> FORCE_START_Y;<br /> }else{<br /> $CREATE_HEIGHT = $this -> PICTURE_HEIGHT;<br /> }<br />/**<br /> * 创建一个画布<br /> */<br /> $NEW_PICTURE_CREATE = imagecreatetruecolor($CREATE_WIDTH, $CREATE_HEIGHT);<br /> $WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);<br />/**<br /> * 将背景图拷贝到画布中<br /> */<br /> imagecopy($NEW_PICTURE_CREATE, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /><br />/**<br /> * 将目标图片拷贝到背景图片上<br /> */<br /> imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this -> FORCE_X, $this -> FORCE_Y, $this -> FORCE_START_X, $this -> FORCE_START_Y, $FORCE_PICTURE_WIDTH, $FORCE_PICTURE_HEIGHT);<br /> $this -> TRUE_COLOR = $NEW_PICTURE_CREATE;<br /> }<br /> # end of mark<br />function alpha_(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $rgb = "#CDCDCD";<br /> $tran_color = "#000000";<br /> for($j = 0;$j <= $this -> PICTURE_HEIGHT-1;$j++){<br /> for ($i = 0;$i <= $this -> PICTURE_WIDTH-1;$i++)<br /> {<br /> $rgb = imagecolorat($this -> PICTURE_CREATE, $i, $j);<br /> $r = ($rgb >> 16) & 0xFF;<br /> $g = ($rgb >> 8) & 0xFF;<br /> $b = $rgb & 0xFF;<br /> $now_color = imagecolorallocate($this -> PICTURE_CREATE, $r, $g, $b);<br /> if ($now_color == $tran_color)<br /> {<br /> continue;<br /> }<br /> else<br /> {<br /> $color = imagecolorallocatealpha($this -> PICTURE_CREATE, $r, $g, $b, $ALPHA);<br /> imagesetpixel($this -> PICTURE_CREATE, $ALPHA_X + $i, $ALPHA_Y + $j, $color);<br /> }<br /> $this -> TRUE_COLOR = $this -> PICTURE_CREATE;<br /> <br /> }<br /> }<br /> }<br /><br />/**<br /> * 图片旋转:<br /> * 沿y轴旋转<br /> */<br /> function turn_y(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> for ($x = 0; $x < $this -> PICTURE_WIDTH; $x++)<br />{<br /> imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, $this -> PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this -> PICTURE_HEIGHT);<br /> }<br /> }<br />/**<br /> * 沿X轴旋转<br /> */<br /> function turn_x(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> for ($y = 0; $y < $this -> PICTURE_HEIGHT; $y++){<br /> imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, $this -> PICTURE_HEIGHT - $y - 1, 0, $y, $this -> PICTURE_WIDTH, 1);<br /> }<br /> }<br /><br />/**<br /> * 任意角度旋转<br /> */<br /> function turn(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> imageCopyResized($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $WHITE = imagecolorallocate($this -> TRUE_COLOR, 255, 255, 255);<br /> $this -> TRUE_COLOR = imagerotate ($this -> TRUE_COLOR, $this -> CIRCUMROTATE, $WHITE);<br /> }<br />/**<br /> * 图片锐化<br /> */<br /> function sharp(){<br /> $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $cnt = 0;<br /> for ($x = 0; $x < $this -> PICTURE_WIDTH; $x++){<br /> for ($y = 0; $y < $this -> PICTURE_HEIGHT; $y++){<br /> $src_clr1 = imagecolorsforindex($this -> TRUE_COLOR, imagecolorat($this -> PICTURE_CREATE, $x-1, $y-1));<br /> $src_clr2 = imagecolorsforindex($this -> TRUE_COLOR, imagecolorat($this -> PICTURE_CREATE, $x, $y));<br /> $r = intval($src_clr2["red"] + $this -> SHARP * ($src_clr2["red"] - $src_clr1["red"]));<br /> $g = intval($src_clr2["green"] + $this -> SHARP * ($src_clr2["green"] - $src_clr1["green"]));<br /> $b = intval($src_clr2["blue"] + $this -> SHARP * ($src_clr2["blue"] - $src_clr1["blue"]));<br /> $r = min(255, max($r, 0));<br /> $g = min(255, max($g, 0));<br /> $b = min(255, max($b, 0));<br /> if (($DST_CLR = imagecolorexact($this -> PICTURE_CREATE, $r, $g, $b)) == -1)<br /> $DST_CLR = imagecolorallocate($this -> PICTURE_CREATE, $r, $g, $b);<br /> $cnt++;<br /> if ($DST_CLR == -1) die("color allocate faile at $x, $y ($cnt).");<br /> imagesetpixel($this -> TRUE_COLOR, $x, $y, $DST_CLR);<br /> }<br /> }<br /> }<br />/**<br /> * 将图片反色处理??<br /> */<br /> function return_color(){<br />/**<br /> * 创建一个画布<br /> */<br /> $NEW_PICTURE_CREATE = imagecreate($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);<br />/**<br /> * 将背景图拷贝到画布中<br /> */<br /> imagecopy($NEW_PICTURE_CREATE, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);<br /> $this -> TRUE_COLOR = $NEW_PICTURE_CREATE;<br /> }<br /><br />/**<br /> * 生成目标图片并显示<br /> */<br /> function show(){<br /> // 判断浏览器,若是IE就不发送头<br />if(isset($_SERVER['HTTP_USER_AGENT']))<br /> {<br /> $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);<br /> if(!preg_match('/^.*MSIE.*\)$/i', $ua))<br /> {<br /> header("Content-type:$this->PICTURE_MIME");<br /> }<br /> }<br /> $OUT = $this -> PICTURE_TYPE;<br /> $OUT($this -> TRUE_COLOR);<br /> }<br /><br />/**<br /> * 生成目标图片并保存<br /> */<br /> function save_picture(){<br /> // 以 JPEG 格式将图像输出到浏览器或文件<br />$OUT = $this -> PICTURE_TYPE;<br /> if(function_exists($OUT)){<br /> // 判断浏览器,若是IE就不发送头<br /> if(isset($_SERVER['HTTP_USER_AGENT']))<br /> {<br /> $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);<br /> if(!preg_match('/^.*MSIE.*\)$/i', $ua))<br /> {<br /> header("Content-type:$this->PICTURE_MIME");<br /> }<br /> }<br /> if(!$this -> TRUE_COLOR){<br /> exit($this -> ERROR['unavilable']);<br /> }else{<br /> $OUT($this -> TRUE_COLOR, $this -> DEST_URL);<br /> $OUT($this -> TRUE_COLOR);<br /> }<br /> }<br /> }<br />/**<br /> * 析构函数：释放图片<br /> */<br /> function __destruct(){<br />/**<br /> * 释放图片<br /> */<br /> imagedestroy($this -> TRUE_COLOR);<br /> imagedestroy($this -> PICTURE_CREATE);<br /> }<br /> # end of class<br />}<br />?>
