该图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色，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。 在一些需要图片高级处理功能的Web应用中，可以参考这个类。
<?php class picture { var $PICTURE_URL;//要处理的图片 var $DEST_URL="temp__01.jpg";//生成目标图片位置 var $PICTURE_CREATE;//要创建的图片 var $TURE_COLOR;//新建一个真彩图象 var $PICTURE_WIDTH;//原图片宽度 var $PICTURE_HEIGHT;//原图片高度 /* 水印的类型，默认的为水印文字 */ var $MARK_TYPE=1; var $WORD;//经过UTF-8后的文字 var $WORD_X;//文字横坐标 var $WORD_Y;//文字纵坐标 var $FONT_TYPE;//字体类型 var $FONT_SIZE="12";//字体大小 var $FONT_WORD;//文字 var $ANGLE=0;//文字的角度，默认为0 var $FONT_COLOR="#000000";//文字颜色 var $FONT_PATH="font/simkai.ttf";//字体库，默认为宋体 var $FORCE_URL;//水印图片 var $FORCE_X=0;//水印横坐标 var $FORCE_Y=0;//水印纵坐标 var $FORCE_START_X=0;//切起水印的图片横坐标 var $FORCE_START_Y=0;//切起水印的图片纵坐标 var $PICTURE_TYPE;//图片类型 var $PICTURE_MIME;//输出的头部 /* 缩放比例为1的话就按缩放高度和宽度缩放 */ var $ZOOM=1;//缩放类型 var $ZOOM_MULTIPLE;//缩放比例 var $ZOOM_WIDTH;//缩放宽度 var $ZOOM_HEIGHT;//缩放高度 /* 裁切，按比例和固定长度、宽度 */ var $CUT_TYPE=1;//裁切类型 var $CUT_X=0;//裁切的横坐标 var $CUT_Y=0;//裁切的纵坐标 var $CUT_;//裁切的宽度 var $CUT_HEIGHT=100;//裁切的高度 /* 锐化 */ var $SHARP="7.0";//锐化程度 /* 透明度处理 */ var $ALPHA='100';//透明度在0-127之间 var $ALPHA_X="90"; var $ALPHA_Y="50"; /* 任意角度旋转 */ var $CIRCUMROTATE="90.0";//注意，必须为浮点数 /* 出错信息 */ var $ERROR=array( 'unalviable'=>'没有找到相关图片!' ); /* 构造函数：函数初始化 */ function __construct($PICTURE_URL) { $this->get_info($PICTURE_URL); } function get_info($PICTURE_URL) { /* 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息 */ @$SIZE=getimagesize($PICTURE_URL); if(!$SIZE) { exit($this->ERROR['unalviable']); } //得到原图片的信息类型、宽度、高度 $this->PICTURE_MIME=$SIZE['mime']; $this->PICTURE_; $this->PICTURE_HEIGHT=$SIZE[1]; //创建图片 switch($SIZE[2]) { case 1: $this->PICTURE_CREATE=imagecreatefromgif($PICTURE_URL); $this->PICTURE_TYPE="imagejpeg"; $this->PICTURE_EXT="jpg"; break; case 2: $this->PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL); $this->PICTURE_TYPE="imagegif"; $this->PICTURE_EXT="gif"; break; case 3: $this->PICTURE_CREATE=imagecreatefrompng($PICTURE_URL); $this->PICTURE_TYPE="imagepng"; $this->PICTURE_EXT="png"; break; } /* 文字颜色转换16进制转换成10进制 */ preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES); if(count($MATCHES)==3) { $this->RED=hexdec($MATCHES[0][0]); $this->GREEN=hexdec($MATCHES[0][1]); $this->BLUE=hexdec($MATCHES[0][2]); } } //end of __construct /* 将16进制的颜色转换成10进制的（R，G，B） */ function hex2dec() { preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES); if(count($MATCHES)==3) { $this->RED=hexdec($MATCHES[0][0]); $this->GREEN=hexdec($MATCHES[0][1]); $this->BLUE=hexdec($MATCHES[0][2]); } } //缩放类型 function zoom_type($ZOOM_TYPE) { $this->ZOOM=$ZOOM_TYPE; } //对图片进行缩放,如果不指定高度和宽度就进行缩放 function zoom() { //缩放的大小 if($this->ZOOM==0) { $this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE; $this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE; } //新建一个真彩图象 $this->TRUE_COLOR=imagecreatetruecolor($this->ZOOM_WIDTH,$this->ZOOM_HEIGHT); $WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255); imagefilledrectangle($this->TRUE_COLOR,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$WHITE); imagecopyresized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); } //end of zoom //裁切图片,按坐标或自动 function cut() { $this->TRUE_COLOR=imagecreatetruecolor($this->CUT_WIDTH,$this->CUT_WIDTH); imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE, 0, 0, $this->CUT_X, $this->CUT_Y,$this->CUT_WIDTH,$this->CUT_HEIGHT); } //end of cut /* 在图片上放文字或图片 水印文字 */ function _mark_text() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $this->WORD=mb_convert_encoding($this->FONT_WORD,'utf-8','gb2312'); /* 取得使用 TrueType 字体的文本的范围 */ $TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD); $WORD_LENGTH=strlen($this->WORD); $WORD_WIDTH =$TEMP[2] - $TEMP[6]; $WORD_HEIGHT =$TEMP[3] - $TEMP[7]; /* 文字水印的默认位置为右下角 */ if($this->WORD_X=="") { $this->WORD_X=$this->PICTURE_WIDTH-$WORD_WIDTH; } if($this->WORD_Y=="") { $this->WORD_Y=$this->PICTURE_HEIGHT-$WORD_HEIGHT; } imagesettile($this->TRUE_COLOR,$this->PICTURE_CREATE); imagefilledrectangle($this->TRUE_COLOR,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,IMG_COLOR_TILED); $TEXT2=imagecolorallocate($this->TRUE_COLOR,$this->RED,$this->GREEN,$this->Blue); imagettftext($this->TRUE_COLOR,$this->FONT_SIZE,$this->ANGLE,$this->WORD_X,$this->WORD_Y,$TEXT2,$this->FONT_PATH,$this->WORD); } /* 水印图片 */ function _mark_picture() { /* 获取水印图片的信息 */ @$SIZE=getimagesize($this->FORCE_URL); if(!$SIZE) { exit($this->ERROR['unalviable']); } $FORCE_PICTURE_; $FORCE_PICTURE_HEIGHT=$SIZE[1]; //创建水印图片 switch($SIZE[2]) { case 1: $FORCE_PICTURE_CREATE=imagecreatefromgif($this->FORCE_URL); $FORCE_PICTURE_TYPE="gif"; break; case 2: $FORCE_PICTURE_CREATE=imagecreatefromjpeg($this->FORCE_URL); $FORCE_PICTURE_TYPE="jpg"; break; case 3: $FORCE_PICTURE_CREATE=imagecreatefrompng($this->FORCE_URL); $FORCE_PICTURE_TYPE="png"; break; } /* 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。 */ $this->NEW_PICTURE=$this->PICTURE_CREATE; if($FORCE_PICTURE_WIDTH>$this->PICTURE_WIDTH) { $CREATE_;gt;FORCE_START_X; } else { $CREATE_;gt;PICTURE_WIDTH; } if($FORCE_PICTURE_HEIGHT>$this->PICTURE_HEIGHT) { $CREATE_HEIGHT=$FORCE_PICTURE_HEIGHT-$this->FORCE_START_Y; } else { $CREATE_HEIGHT=$this->PICTURE_HEIGHT; } /* 创建一个画布 */ $NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT); $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255); /* 将背景图拷贝到画布中 */ imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); /* 将目标图片拷贝到背景图片上 */ imagecopy($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); $this->TRUE_COLOR=$NEW_PICTURE_CREATE; } //end of mark function alpha_() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $rgb="#CDCDCD"; $tran_color="#000000"; for($j=0;$j<=$this->PICTURE_HEIGHT-1;$j++) { for ($i=0;$i<=$this->PICTURE_WIDTH-1;$i++) { $rgb = imagecolorat($this->PICTURE_CREATE,$i,$j); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; $now_color=imagecolorallocate($this->PICTURE_CREATE,$r,$g,$b); if ($now_color==$tran_color) { continue; } else { $color=imagecolorallocatealpha($this->PICTURE_CREATE,$r,$g,$b,$ALPHA); imagesetpixel($this->PICTURE_CREATE,$ALPHA_X+$i,$ALPHA_Y+$j,$color); } $this->TRUE_COLOR=$this->PICTURE_CREATE; } } } /* 图片旋转: 沿y轴旋转 */ function turn_y() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); for ($x = 0; $x < $this->PICTURE_WIDTH; $x++) { imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, $this->PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this->PICTURE_HEIGHT); } } /* 沿X轴旋转 */ function turn_x() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++) { imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, $this->PICTURE_HEIGHT - $y - 1, 0, $y, $this->PICTURE_WIDTH, 1); } } /* 任意角度旋转 */ function turn() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); imageCopyResized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255); $this->TRUE_COLOR=imagerotate ($this->TRUE_COLOR, $this->CIRCUMROTATE, $WHITE); } /* 图片锐化 */ function sharp() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $cnt=0; for ($x=0; $x<$this->PICTURE_WIDTH; $x++) { for ($y=0; $y<$this->PICTURE_HEIGHT; $y++) { $src_clr1 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x-1, $y-1)); $src_clr2 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x, $y)); $r = intval($src_clr2["red"]+$this->SHARP*($src_clr2["red"]-$src_clr1["red"])); $g = intval($src_clr2["green"]+$this->SHARP*($src_clr2["green"]-$src_clr1["green"])); $b = intval($src_clr2["blue"]+$this->SHARP*($src_clr2["blue"]-$src_clr1["blue"])); $r = min(255, max($r, 0)); $g = min(255, max($g, 0)); $b = min(255, max($b, 0)); if (($DST_CLR=imagecolorexact($this->PICTURE_CREATE, $r, $g, $b))==-1) $DST_CLR = imagecolorallocate($this->PICTURE_CREATE, $r, $g, $b); $cnt++; if ($DST_CLR==-1) die("color allocate faile at $x, $y ($cnt)."); imagesetpixel($this->TRUE_COLOR, $x, $y, $DST_CLR); } } } /* 将图片反色处理?? */ function return_color() { /* 创建一个画布 */ $NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255); /* 将背景图拷贝到画布中 */ imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $this->TRUE_COLOR=$NEW_PICTURE_CREATE; } /* 生成目标图片并显示 */ function show() { // 判断浏览器,若是IE就不发送头 if(isset($_SERVER['HTTP_USER_AGENT'])) { $ua = strtoupper($_SERVER['HTTP_USER_AGENT']); if(!preg_match('/^.*MSIE.*\)$/i',$ua)) { header("Content-type:$this->PICTURE_MIME"); } } $OUT=$this->PICTURE_TYPE; $OUT($this->TRUE_COLOR); } /* 生成目标图片并保存 */ function save_picture() { // 以 JPEG 格式将图像输出到浏览器或文件 $OUT=$this->PICTURE_TYPE; if(function_exists($OUT)) { // 判断浏览器,若是IE就不发送头 if(isset($_SERVER['HTTP_USER_AGENT'])) { $ua = strtoupper($_SERVER['HTTP_USER_AGENT']); if(!preg_match('/^.*MSIE.*\)$/i',$ua)) { header("Content-type:$this->PICTURE_MIME"); } } if(!$this->TRUE_COLOR) { exit($this->ERROR['unavilable']); } else { $OUT($this->TRUE_COLOR,$this->DEST_URL); $OUT($this->TRUE_COLOR); } } } /* 析构函数：释放图片 */ function __destruct() { /*释放图片*/ imagedestroy($this->TRUE_COLOR); imagedestroy($this->PICTURE_CREATE); } //end of class } ?>