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标题 php实现的通用图片处理类
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    这篇文章主要介绍了php实现的通用图片处理类,可实现针对图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能,具有一定参考借鉴价值,需要的朋友可以参考下
    本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下：
    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
    }
    ?>
    希望本文所述对大家的php程序设计有所帮助。
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更新时间：2025/5/20 13:44:53