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Usage of php general image processing class

墨辰丷
Release： 2023-03-31 17:24:01
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This article mainly introduces the general image processing class implemented by PHP, which can realize functions such as zooming, cutting, photo frames, watermarks, sharpening, rotation, flipping, transparency, and inversion of images. It has certain reference value. , Friends who need it can refer to

The examples in this article describe the general image processing class implemented by PHP. Share it with everyone for your reference. The details are as follows:

The image processing function functions: zoom, cut, photo frame, watermark, sharpen, rotate, flip, transparency, invert color, the idea of ​​​​processing and saving historical records: when a picture is changed Automatically generate a new picture. The naming method can consider adding steps based on the original picture, for example: picture name __ what step. In some web applications that require advanced image processing functions, you can refer to this class. 

'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
}
?>
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