欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

常用的php图片处理类(水印、等比缩放、固定高宽)分享_php实例

程序员文章站 2022-05-29 09:03:51
...
常用的php图片处理类(水印、等比缩放、固定高宽)分享
typeList = array(1=>'gif',2=>'jpg',3=>'png'); 
    $ginfo = getimagesize($source); 
    $this->source_width = $ginfo[0]; 
    $this->source_height = $ginfo[1]; 
    $this->source_type_id = $ginfo[2]; 
    $this->orign_url = $source; 
    $this->orign_name = basename($source); 
    $this->orign_dirname = dirname($source); 
  } 
    
  //判断图片的文件的格式,返回PHP可识别的编码 
  public function judgeType($type,$source){ 
    if($type == 1){ 
      return imagecreatefromgif($source); //gif 
    }else if($type == 2){ 
      return imagecreatefromjpeg($source); //jpg 
    }else if($type == 3){ 
      return imagecreatefrompng($source); //png 
    }else{ 
      return false; 
    } 
  } 
    
  //生成水印图片 
  public function waterMakeImage($logo){ 
    $linfo = getimagesize($logo); 
    $logo_width = $linfo[0]; 
    $logo_height = $linfo[1]; 
    $logo_type_id = $linfo[2]; 
    $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url); 
    $logoHandle = $this->judgeType($logo_type_id,$logo); 
    if(!$sourceHandle || !$logoHandle){ 
      return false; 
    } 
    $x = ($this->source_width - $logo_width)/2; 
    $y = ($this->source_height - $logo_height)/2; 
    imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height); 
    $newPic = $this->orign_dirname.'\water_'.time().'.'.$this->typeList[$this->source_type_id]; 
    if($this->saveImage($sourceHandle,$newPic)){ 
      imagedestroy($sourceHandle); 
      imagedestroy($logoHandle); 
    } 
  } 
    
  //固定高度宽度 
  public function fixSizeImage($width,$height){ 
    if($width > $this->source_width) $this->source_width; 
    if($height > $this->source_height) $this->source_height; 
    if($width === false){ 
      $width = floor($this->source_width / ($this->source_height / $height)); 
    } 
    if($height === false){ 
      $height = floor($this->source_height / ($this->source_width / $width)); 
    } 
    $this->tinyImage($width,$height); 
  } 
    
  //等比例缩放图片 
  public function scaleImage($scale){ 
    $width = floor($this->source_width * $scale); 
    $height = floor($this->source_height * $scale); 
    $this->tinyImage($width, $height); 
  } 
    
  //创建缩略图 
  public function tinyImage($width,$height){ 
    $tinyImage = imagecreatetruecolor($width,$height); 
    $handle = $this->judgeType($this->source_type_id,$this->orign_url); 
    if(function_exists('imagecopyresampled')){ 
      imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height); 
    }else{ 
      imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height); 
    } 
    $newPic = $this->orign_dirname.'\thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id]; 
    if($this->saveImage($tinyImage,$newPic)){ 
      imagedestroy($tinyImage); 
      imagedestroy($handle); 
    } 
  } 
  //保存图片 
  private function saveImage($image,$url){ 
    if(imagejpeg($image,$url)){ 
      return true; 
    } 
  } 
} 
$imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg'); 
//$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png');  //生成水印图片 
//$imgHandle->fixSizeImage(200,150); //固定长度图片 
$imgHandle->scaleImage(0.2); //等比例缩放 
?>

示例二:

xx,'height'=>xxx)
 * @internal
 * 我们一般的压缩图片方法,在图片过长或过宽时生成的图片
 * 都会被“压扁”,针对这个应采用先裁剪后按比例压缩的方法
 */
 public function thumb_img($src_img, $save_img = '', $option)
 {

 if (empty ( $option ['width'] ) or empty ( $option ['height'] ))
 {
  return array ('flag' => False, 'msg' => '原图长度与宽度不能小于0' );
 }
 $org_ext = $this->is_img ( $src_img );
 if (! $org_ext ['flag'])
 {
  return $org_ext;
 }

 //如果有保存路径,则确定路径是否正确
 if (! empty ( $save_img ))
 {
  $f = $this->check_dir ( $save_img );
  if (! $f ['flag'])
  {
  return $f;
  }
 }

 //获取出相应的方法
 $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );

 //获取原大小
 $source = $org_funcs ['create_func'] ( $src_img );
 $src_w = imagesx ( $source );
 $src_h = imagesy ( $source );

 //调整原始图像(保持图片原形状裁剪图像)
 $dst_scale = $option ['height'] / $option ['width']; //目标图像长宽比
 $src_scale = $src_h / $src_w; // 原图长宽比
 if ($src_scale >= $dst_scale)
 { // 过高
  $w = intval ( $src_w );
  $h = intval ( $dst_scale * $w );

  $x = 0;
  $y = ($src_h - $h) / 3;
 } else
 { // 过宽
  $h = intval ( $src_h );
  $w = intval ( $h / $dst_scale );

  $x = ($src_w - $w) / 2;
  $y = 0;
 }
 // 剪裁
 $croped = imagecreatetruecolor ( $w, $h );
 imagecopy ( $croped, $source, 0, 0, $x, $y, $src_w, $src_h );
 // 缩放
 $scale = $option ['width'] / $w;
 $target = imagecreatetruecolor ( $option ['width'], $option ['height'] );
 $final_w = intval ( $w * $scale );
 $final_h = intval ( $h * $scale );
 imagecopyresampled ( $target, $croped, 0, 0, 0, 0, $final_w, $final_h, $w, $h );
 imagedestroy ( $croped );

 //输出(保存)图片
 if (! empty ( $save_img ))
 {

  $org_funcs ['save_func'] ( $target, $save_img );
 } else
 {
  header ( $org_funcs ['header'] );
  $org_funcs ['save_func'] ( $target );
 }
 imagedestroy ( $target );
 return array ('flag' => True, 'msg' => '' );
 }

 /**
 * 
 * 等比例缩放图像
 * @param $src_img 原图片
 * @param $save_img 需要保存的地方
 * @param $option 参数设置 array('width'=>xx,'height'=>xxx)
 * 
 */
 function resize_image($src_img, $save_img = '', $option)
 {
 $org_ext = $this->is_img ( $src_img );
 if (! $org_ext ['flag'])
 {
  return $org_ext;
 }

 //如果有保存路径,则确定路径是否正确
 if (! empty ( $save_img ))
 {
  $f = $this->check_dir ( $save_img );
  if (! $f ['flag'])
  {
  return $f;
  }
 }

 //获取出相应的方法
 $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );

 //获取原大小
 $source = $org_funcs ['create_func'] ( $src_img );
 $src_w = imagesx ( $source );
 $src_h = imagesy ( $source );

 if (($option ['width'] && $src_w > $option ['width']) || ($option ['height'] && $src_h > $option ['height']))
 {
  if ($option ['width'] && $src_w > $option ['width'])
  {
  $widthratio = $option ['width'] / $src_w;
  $resizewidth_tag = true;
  }

  if ($option ['height'] && $src_h > $option ['height'])
  {
  $heightratio = $option ['height'] / $src_h;
  $resizeheight_tag = true;
  }

  if ($resizewidth_tag && $resizeheight_tag)
  {
  if ($widthratio  True, 'msg' => '' );
 }

 /**
 * 
 * 生成水印图片
 * @param $org_img 原图像
 * @param $mark_img 水印标记图像
 * @param $save_img 当其目录不存在时,会试着创建目录
 * @param array $option 为水印的一些基本设置包含:
 * x:水印的水平位置,默认为减去水印图宽度后的值
 * y:水印的垂直位置,默认为减去水印图高度后的值
 * alpha:alpha值(控制透明度),默认为50
 */
 public function water_mark($org_img, $mark_img, $save_img = '', $option = array())
 {
 //检查图片
 $org_ext = $this->is_img ( $org_img );
 if (! $org_ext ['flag'])
 {
  return $org_ext;
 }
 $mark_ext = $this->is_img ( $mark_img );
 if (! $mark_ext ['flag'])
 {
  return $mark_ext;
 }
 //如果有保存路径,则确定路径是否正确
 if (! empty ( $save_img ))
 {
  $f = $this->check_dir ( $save_img );
  if (! $f ['flag'])
  {
  return $f;
  }
 }

 //获取相应画布
 $org_funcs = $this->get_img_funcs ( $org_ext ['msg'] );
 $org_img_im = $org_funcs ['create_func'] ( $org_img );

 $mark_funcs = $this->get_img_funcs ( $mark_ext ['msg'] );
 $mark_img_im = $mark_funcs ['create_func'] ( $mark_img );

 //拷贝水印图片坐标
 $mark_img_im_x = 0;
 $mark_img_im_y = 0;
 //拷贝水印图片高宽
 $mark_img_w = imagesx ( $mark_img_im );
 $mark_img_h = imagesy ( $mark_img_im );

 $org_img_w = imagesx ( $org_img_im );
 $org_img_h = imagesx ( $org_img_im );

 //合成生成点坐标
 $x = $org_img_w - $mark_img_w;
 $org_img_im_x = isset ( $option ['x'] ) ? $option ['x'] : $x;
 $org_img_im_x = ($org_img_im_x > $org_img_w or $org_img_im_x  $org_img_h or $org_img_im_y  100 or $alpha  True, 'msg' => '' );

 }

 /**
 * 
 * 检查图片
 * @param unknown_type $img_path
 * @return array('flag'=>true/false,'msg'=>ext/错误信息) 
 */
 private function is_img($img_path)
 {
 if (! file_exists ( $img_path ))
 {
  return array ('flag' => False, 'msg' => "加载图片 $img_path 失败!" );
 }
 $ext = explode ( '.', $img_path );
 $ext = strtolower ( end ( $ext ) );
 if (! in_array ( $ext, $this->exts ))
 {
  return array ('flag' => False, 'msg' => "图片 $img_path 格式不正确!" );
 }
 return array ('flag' => True, 'msg' => $ext );
 }

 /**
 * 
 * 返回正确的图片函数
 * @param unknown_type $ext
 */
 private function get_img_funcs($ext)
 {
 //选择
 switch ($ext)
 {
  case 'jpg' :
  $header = 'Content-Type:image/jpeg';
  $createfunc = 'imagecreatefromjpeg';
  $savefunc = 'imagejpeg';
  break;
  case 'jpeg' :
  $header = 'Content-Type:image/jpeg';
  $createfunc = 'imagecreatefromjpeg';
  $savefunc = 'imagejpeg';
  break;
  case 'gif' :
  $header = 'Content-Type:image/gif';
  $createfunc = 'imagecreatefromgif';
  $savefunc = 'imagegif';
  break;
  case 'bmp' :
  $header = 'Content-Type:image/bmp';
  $createfunc = 'imagecreatefrombmp';
  $savefunc = 'imagebmp';
  break;
  default :
  $header = 'Content-Type:image/png';
  $createfunc = 'imagecreatefrompng';
  $savefunc = 'imagepng';
 }
 return array ('save_func' => $savefunc, 'create_func' => $createfunc, 'header' => $header );
 }

 /**
 * 
 * 检查并试着创建目录
 * @param $save_img
 */
 private function check_dir($save_img)
 {
 $dir = dirname ( $save_img );
 if (! is_dir ( $dir ))
 {
  if (! mkdir ( $dir, 0777, true ))
  {
  return array ('flag' => False, 'msg' => "图片保存目录 $dir 无法创建!" );
  }
 }
 return array ('flag' => True, 'msg' => '' );
 }
}

if (! empty ( $_FILES ['test'] ['tmp_name'] ))
{
 //例子
 $img = new Img ();
 //原图
 $name = explode ( '.', $_FILES ['test'] ['name'] );
 $org_img = 'D:/test.' . end ( $name );
 move_uploaded_file ( $_FILES ['test'] ['tmp_name'], $org_img );
 $option = array ('width' => $_POST ['width'], 'height' => $_POST ['height'] );
 if ($_POST ['type'] == 1)
 {
 $s = $img->resize_image ( $org_img, '', $option );
 } else
 {
 $img->thumb_img ( $org_img, '', $option );
 }
 unlink ( $org_img );
}

以上所述就是本文的全部内容了,希望大家能够喜欢。

相关标签: php 图片处理