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PHP image processing class, thumbnail, watermark_PHP tutorial

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Release： 2016-07-20 11:06:50
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php 图片处理类，缩略，水印

class Image {

 /**
* @var string $fileName file name
* @access private
*/
 private $fileName = '';
 
 /**
* @var gd resource $imageResource original image
* @access private
*/
 private $imageResource = NULL;
 
 /**
* @var int $imageWidth original image width
* @access private
*/
 private $imageWidth = NULL;
 
 /**
* @var int $imageHeight original image height
* @access private
*/
 private $imageHeight = NULL;
 
 /**
* @var int $imageType original image type
* @access private
*/
 private $imageType = NULL;
 
 /**
* @var int $newResource new image
* @access private
*/
 private $newResource = NULL;
 
 /**
* @var int $newResType new image type
* @access private
*/
 private $newResType = NULL;
 
 /**
* Constructor
* @param string $fileName file name
*/
 public function __construct($fileName = NULL) {
  $this->fileName = $fileName;
  if ($this->fileName) {
   $this->getSrcImageInfo();
  }
 }
 
 /**
* Get source image information
* @access private
* @return void
*/
 private function getSrcImageInfo() {
  $info = $this->getImageInfo();
  $this->imageWidth = $info[0];
  $this->imageHeight = $info[1];
  $this->imageType = $info[2];
 }

 /**
* Get image information
* @param string $fileName file name
* @access private
* @return array
*/
 private function getImageInfo($fileName = NULL) {
  if ($fileName==NULL) {
   $fileName = $this->fileName;
  }
  $info = getimagesize($fileName);
  return $info;
 }

 /**
* Create source image GD resource
* @access private
* @return void
*/
 private function createSrcImage () {
  $this->imageResource = $this->createImageFromFile();
 }

 /**
* Create image GD resource based on file
* @param string $fileName file name
* @return gd resource
*/
    public function createImageFromFile($fileName = NULL)
    {
  if (!$fileName) {
   $fileName = $this->fileName;
   $imgType = $this->imageType;
  }
        if (!is_readable($fileName) || !file_exists($fileName)) {
            throw new Exception('Unable to open file "' . $fileName . '"');
        }

  if (!$imgType) {
   $imageInfo = $this->getImageInfo($fileName);
   $imgType = $imageInfo[2];
  }
  
        switch ($imgType) {
  case IMAGETYPE_GIF:
   $tempResource = imagecreatefromgif($fileName);
   break;
  case IMAGETYPE_JPEG:
   $tempResource = imagecreatefromjpeg($fileName);
   break;
  case IMAGETYPE_PNG:
   $tempResource = imagecreatefrompng($fileName);
   break;
  case IMAGETYPE_WBMP:
   $tempResource = imagecreatefromwbmp($fileName);
   break;
  case IMAGETYPE_XBM:
   $tempResource = imagecreatefromxbm($fileName);
   break;
  default:
   throw new Exception('错误的图片格式，或图片有问

题！');
        }
  return $tempResource;
    }
 /**
  * 改变图像大小
  * @param int $width 宽
  * @param int $height 高
  * @param string $flag 按什么方式改变 0=长宽转换成参数指定的 1=按比

例缩放，长宽约束在参数指定内，2=以宽为约束缩放，3=以高为约束缩放
  * @return string
  */
 public function resizeImage($width, $height, $flag=1) {
  global $cfg;
  $widthRatio = $width/$this->imageWidth;
  $heightRatio = $height/$this->imageHeight;
  switch ($flag) {
  case 1:
   if ($this->imageHeight < $height && $this-

>imageWidth < $width) {
    $endWidth = $this->imageWidth;
    $endHeight = $this->imageHeight;
    //return;
   } elseif (($this->imageHeight * $widthRatio)

>$height) {
    $endWidth = ceil($this->imageWidth *

$heightRatio);
    $endHeight = $height;
   } else {
    $endWidth = $width;
    $endHeight = ceil($this->imageHeight *

$widthRatio);
   }
   break;
  case 2:
   $endWidth = $width;
   $endHeight = ceil($this->imageHeight * $widthRatio);
   break;
  case 3:
   $endWidth = ceil($this->imageWidth * $heightRatio);
   $endHeight = $height;
   break;
  case 4:
   $endWidth2 = $width;
   $endHeight2 = $height;
   if ($this->imageHeight < $height && $this-

>imageWidth < $width) {
    $endWidth = $this->imageWidth;
    $endHeight = $this->imageHeight;
    //return;
   } elseif (($this->imageHeight * $widthRatio)

<$height) {
    $endWidth = ceil($this->imageWidth *

$heightRatio);
    $endHeight = $height;
   } else {
    $endWidth = $width;
    $endHeight = ceil($this->imageHeight *

$widthRatio);
   }
   break;
  case 5:
   $endWidth2 = $width;
   $endHeight2 = $height;
   if ($this->imageHeight > $height && $this-

>imageWidth > $width) {
    //都大
    $ratio = max($this->imageHeight/

$height,$this->imageWidth/$width);
   }elseif ($this->imageHeight > $height){
    $ratio = $this->imageHeight/$height;
   }elseif ( $this->imageWidth > $width){
    $ratio =$this->imageWidth/$width;
   }else{
    $ratio =1;
   }
   
   $endWidth = $this->imageWidth / $ratio;
   $endHeight = $this->imageHeight / $ratio;
   
   break;
  default:
   $endWidth = $width;
   $endHeight = $height;
   break;
  }
  if ($this->imageResource==NULL) {
   $this->createSrcImage();
  }
  if($flag == 5){
   //直接缩略
   $this->newResource = imagecreatefromjpeg($cfg

['path']['data'].'blank_thumb.jpg');
  }elseif ($flag==4) {
   $this->newResource = imagecreatetruecolor

($endWidth2,$endHeight2);
  } else {
   $this->newResource = imagecreatetruecolor

($endWidth,$endHeight);
  }
  $this->newResType = $this->imageType;
  if($flag == 5){
   $dest_x = ($width-$endWidth)/2;
   $dest_y = ($height-$endHeight)/2;
   imagecopyresampled($this->newResource, $this-

>imageResource, $dest_x, $dest_y, 0, 0, $endWidth, $endHeight,$this-

>imageWidth,$this->imageHeight);
  }else{
   imagecopyresampled($this->newResource, $this-

>imageResource, 0, 0, 0, 0, $endWidth, $endHeight,$this->imageWidth,$this-

>imageHeight);
  }
 }

 /**
* Add watermark to the image
* @param string $waterContent The watermark content can be the image file name or the text

character
* @param int $pos Position 0-9 is OK Is an array
* @param int $textFont Font size, valid when the watermark content is text
* @param string $textColor Text color, valid when the watermark content is text
* @return string
*/
 public function waterMark($waterContent, $pos = 0, $textFont=5,

$textColor="#ffffff") {
  $isWaterImage = file_exists($waterContent);
  if ($isWaterImage) {
   $waterImgRes = $this->createImageFromFile

($waterContent);
   $waterImgInfo = $this->getImageInfo($waterContent);
   $waterWidth = $waterImgInfo[0];
   $waterHeight = $waterImgInfo[1];
  } else {
   $waterText = $waterContent;
   //$temp = @imagettfbbox(ceil

($textFont*2.5),0,"./cour.ttf",$waterContent);
   if ($temp) {
    $waterWidth = $temp[2]-$temp[6];
    $waterHeight = $temp[3]-$temp[7];
   } else {
    $waterWidth = 100;
    $waterHeight = 12;
   }
  }
  if ($this->imageResource==NULL) {
   $this->createSrcImage();
  }
  switch($pos)
  {
  case 0://随机
   $posX = rand(0,($this->imageWidth - $waterWidth));
   $posY = rand(0,($this->imageHeight - $waterHeight));
   break;
  case 1://1为顶端居左
   $posX = 0;
   $posY = 0;
   break;
  case 2://2为顶端居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = 0;
   break;
  case 3://3为顶端居右
   $posX = $this->imageWidth - $waterWidth;
   $posY = 0;
   break;
  case 4://4为中部居左
   $posX = 0;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 5://5为中部居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 6://6为中部居右
   $posX = $this->imageWidth - $waterWidth;
   $posY = ($this->imageHeight - $waterHeight) / 2;
   break;
  case 7://7为底端居左
   $posX = 0;
   $posY = $this->imageHeight - $waterHeight;
   break;
  case 8://8为底端居中
   $posX = ($this->imageWidth - $waterWidth) / 2;
   $posY = $this->imageHeight - $waterHeight;
   break;
  case 9://9为底端居右
   $posX = $this->imageWidth - $waterWidth-20;
   $posY = $this->imageHeight - $waterHeight-10;
   break;
  default://随机
   $posX = rand(0,($this->imageWidth - $waterWidth));
   $posY = rand(0,($this->imageHeight - $waterHeight));
   break;    
  }
  imagealphablending($this->imageResource, true); 
  if($isWaterImage) {
   imagecopy($this->imageResource, $waterImgRes, $posX,

$posY, 0, 0, $waterWidth,$waterHeight);   
  } else {
   $R = hexdec(substr($textColor,1,2));
   $G = hexdec(substr($textColor,3,2));
   $B = hexdec(substr($textColor,5));
   
   $textColor = imagecolorallocate($this-

>imageResource, $R, $G, $B);
   imagestring ($this->imageResource, $textFont, $posX,

$posY, $waterText, $textColor);        
  }
  $this->newResource =  $this->imageResource;
  $this->newResType = $this->imageType;
 }
 
 /**
* Generate verification code image
* @param int $width width
* @param string $height height
* @param int $length length
* @param int $validType 0=number ,1=letter,2=number plus letter
* @param string $textColor text color
* @param string $backgroundColor background color
* @return void
*/
 public function imageValidate($width, $height, $length = 4,

$validType = 1, $textColor = '#000000', $backgroundColor = '#ffffff') {
  if ($validType==1) {
   //$validString =

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   //$validLength = 52;
   //no i no l
   $validString =

'abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
   $validLength = 48;
  } elseif ($validType==2) {
   //$validString =

'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
   //$validLength = 62;
   //no i no l no 1
   $validString =

'023456789abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNOPQRSTUVWXYZ';
   $validLength = 57;
  } else {
   $validString = '0123456789';
   $validLength = 10;
  }
  
  srand((int)time());
  $valid = '';
  for ($i=0; $i<$length; $i++) {
   $valid .= $validString{rand(0, $validLength-1)};
  }
  $this->newResource = imagecreate($width,$height);
  $bgR = hexdec(substr($backgroundColor,1,2));
  $bgG = hexdec(substr($backgroundColor,3,2));
  $bgB = hexdec(substr($backgroundColor,5,2));
  $backgroundColor = imagecolorallocate($this->newResource,

$bgR, $bgG, $bgB);
  $tR = hexdec(substr($textColor,1,2));
  $tG = hexdec(substr($textColor,3,2));
  $tB = hexdec(substr($textColor,5,2));
  $textColor = imagecolorallocate($this->newResource, $tR,

$tG, $tB);
  for ($i=0;$i   imagestring($this->newResource,5,$i*$width/

$length+3,2, $valid[$i],$textColor);
  }
  $this->newResType = IMAGETYPE_JPEG;
  return $valid;

 }
 
 /**
* Display output image
* @return void
*/
 public function display($fileName='', $quality=60) {
 
  $imgType = $this->newResType;
  $imageSrc = $this->newResource;
        switch ($imgType) {
  case IMAGETYPE_GIF:
   if ($fileName=='') {
    header('Content-type: image/gif');
   }
   imagegif($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_JPEG:
   if ($fileName=='') {
    header('Content-type: image/jpeg');
   }
   imagejpeg($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_PNG:
   if ($fileName=='') {
    header('Content-type: image/png');
    imagepng($imageSrc);
   } else {
    imagepng($imageSrc, $fileName);
   }
   break;
  case IMAGETYPE_WBMP:
   if ($fileName=='') {
    header('Content-type: image/wbmp');
   }
   imagewbmp($imageSrc, $fileName, $quality);
   break;
  case IMAGETYPE_XBM:
   if ($fileName=='') {
    header('Content-type: image/xbm');
   }
   imagexbm($imageSrc, $fileName, $quality);
   break;
  default:
   throw new Exception('Unsupport image type');
        }
  imagedestroy($imageSrc);
 }
 
 /**
  * 保存图像
  * @param int $fileNameType 文件名类型 0使用原文件名，1使用指定的文

file name, 2 adds a suffix to the original file name, 3 generates a random file name
* @param string $folder If the folder path is empty, it is the same as the original file
* @param string $param The parameter $fileNameType is 2. Add suffix
to the file name * @return void
*/
public function save($fileNameType = 0, $folder = NULL, $param =

'_miniature') {
if ($folder==NULL) {
$folder = dirname($this-

>fileName).DIRECTORY_SEPARATOR;

}
$fileExtName = FileSystem ::fileExt($this->fileName, true);
$fileBesicName = FileSystem::getBasicName($this->fileName,

false);
switch ($fileNameType) {
case 1:
//$newFileName = $folder.$param;
$newFileName = $folder.basename($this-

>fileName);
// var_dump($newFileName);
break;
case 2:
$newFileName =

$folder.$fileBesicName.$param.$fileExtName;
break;
case 3:
$tmp = date('YmdHis');
$fileBesicName = $tmp;
$i = 0;
while (file_exists

($folder.$fileBesicName .$fileExtName)) {
$fileBesicName = $tmp.$i;
$i++;
}
$newFileName =

$folder.$fileBesicName.$fileExtName;
break;
default:
$newFileName = $this->fileName;
break;
}
$this->display($newFileName);
return $ newFileName;
}
/**
* Cut out the selected area
*
* @param string $srcimgurl Original image
* @param string $endimgurl Processed image
* @param int $x Coordinate origin X
* @param int $y coordinate origin Y
* @param int $endimg_w final image width
* @param int $endimg_h final image height
* @param int $border_w final coordinate X
* @param int $border_h The final coordinate Y
* @param int $scale The percentage of original image scaling
* @param int $fix Whether to automatically take the value
*/
public function cutimg

($srcimgurl,$endimgurl,$x,$y,$endimg_w,$endimg_h,$border_w ,$border_h,$scale=

100,$fix=0){
$path = dirname ($endimgurl);
if (!is_dir($path)) {
if (!@mkdir ($path, 0777)){
die ("{$path} This directory cannot be created, file creation failed");
}
}
$ground_info = getimagesize($ srcimgurl);
switch($ground_info[2]){
case 1:$im = imagecreatefromgif($srcimgurl);break;
case 2:$im = imagecreatefromjpeg($srcimgurl);break;
case 3:$im = imagecreatefrompng($srcimgurl);break;
default:die("Picture format does not allow $srcimgurl");
}
if($fix){//Easy to intercept Part of the avatar
if($ground_info[0]<$ground_info[1]){
$border_w=$ground_info[0];
$border_h=$endimg_h*$ground_info[0]/

$endimg_w;
}elseif($ground_info[0]>$ground_info[1]){
$border_h=$ground_info[1];
$border_w=$endimg_w*$ ground_info[1]/

$endimg_h;
}else{
$border_w=$ground_info[0];
$border_h=$ground_info[1];
}
}
$newim = imagecreatetruecolor($endimg_w, $endimg_h);
$x=($x*100)/$scale;
$y=($y*100)/$scale;
$border_width=($border_w*100)/$scale;
$border_height=($border_h*100)/$scale;
imagecopyresampled($newim, $im, 0,0, $x,$ y, $endimg_w,

$endimg_h, $border_width, $border_height );
  if(function_exists("imagegif")){
   switch($ground_info[2]){
    case 1:imagegif($newim,$endimgurl);break;
    case 2:imagejpeg($newim,$endimgurl);break;
    case 3:imagepng($newim,$endimgurl);break;
    default:die("errorMsg");
   }
  }elseif(function_exists("imagejpeg")){
   imagejpeg($newim,$endimgurl);
  }else{
   imagepng($newim,$endimgurl);
  }
  imagedestroy ($newim);
  imagedestroy ($im);
 }
}


www.bkjia.comtruehttp://www.bkjia.com/PHPjc/445017.htmlTechArticlephp 图片处理类，缩略，水印 class Image { /*** @var string $fileName file name * @access private*/ private $fileName = ''; /** * @var gd resource $imageResource 原图像...
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