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。

* 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

具体代码如下：

PHP;"> 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_WIDTH = 100; //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_WIDTH = $SIZE[0];
$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;
}

/** 
 * <a href="https://www.jb51.cc/tag/wenzi/" target="_blank" class="keywords">文字</a>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,$MATCHES);
if(count($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_WIDTH = $this -> 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);
imagefilledrectangle($this -> TRUE_COLOR,$this -> ZOOM_WIDTH,$this -> ZOOM_HEIGHT,$WHITE);
imagecopyresized($this -> TRUE_COLOR,$this -> PICTURE_CREATE,$this -> PICTURE_WIDTH,$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,$this -> CUT_X,$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,$this -> FONT_PATH,$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,$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 -> 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_WIDTH = $SIZE[0];
$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_WIDTH = $FORCE_PICTURE_WIDTH - $this -> FORCE_START_X;
}else{
$CREATE_WIDTH = $this -> PICTURE_WIDTH;
}
if($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);
/**
将背景图拷贝到画布中
*/
imagecopy($NEW_PICTURE_CREATE,$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,$b,$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_WIDTH - $x - 1,$x,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_HEIGHT - $y - 1,$y,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_HEIGHT);
$WHITE = imagecolorallocate($this -> TRUE_COLOR,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,$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,$b)) == -1)
$DST_CLR = imagecolorallocate($this -> PICTURE_CREATE,$b);
$cnt++;
if ($DST_CLR == -1) die("color allocate faile at $x,$y ($cnt).");
imagesetpixel($this -> TRUE_COLOR,$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,$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

}
?>

这就是非常强大的PHP 图片处理类，好好收藏，亲，相信以后一定会派上用场的。

原文链接：https://www.f2er.com/php/21080.html

功能强大的PHP图片处理类(水印、透明度、旋转)

end of __construct

end of zoom

end of cut

end of mark

end of class

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