图像调整大小时，Codeigniter图像旋转

Question

我有一个尺寸为（W-3000 X H-4000）的图像。当我上传并调整大小时，它总是显示为横向模式，意味着新的尺寸是w-1067 X h-800。我想创建这张照片800X600的风景或600X800的肖像。这里是我的代码：

$config['upload_path'] = './uploads/'; 
    $config['allowed_types'] = 'jpg|jpeg|gif|png'; 
    $config['max_size'] = '5000'; 
    $this->load->library('upload', $config); 

    //check if a file is being uploaded 
    if(strlen($_FILES["testimg"]["name"])>0){ 

     if (!$this->upload->do_upload("testimg"))//Check if upload is unsuccessful 
     { 
      $error = array('error' => $this->upload->display_errors()); 
      print_r($errors); 
     } 
     else 
     { 

      $config['image_library'] = 'gd2'; 
      $config['source_image'] = $this->upload->upload_path.$this->upload->file_name; 
      $config['width'] = '1'; 
      $config['height'] = '800'; 
      $config['maintain_ratio'] = TRUE; 
      $config['master_dim'] = 'height'; 
      $this->load->library('image_lib',$config); 

      if (!$this->image_lib->resize()){ 
       echo "error"; 
      }else{ 
       echo "success"; 
      } 
     }  
    } 

在我的代码高度总是800px的大小。 3000X4000尺寸图像可以。但是，当我使用4000X3000尺寸图像时呢？任何人都可以帮我解决这个问题吗？由于

Answer 1

$filename = $_FILES['testing']['tmp_name']; 
list($width, $height) = getimagesize($filename); 

if ($width >= $height) 
{ 
    $config['width'] = 800; 
    $config['master_dim'] = 'width'; 
} 
else 
{ 
    $config['height'] = 800; 
    $config['master_dim'] = 'height'; 
} 

更短，您可以使用master_dim“自动”的参数，将决定其值越大 - 宽度或高度。

$filename = $_FILES['testing']['tmp_name']; 
list($width, $height) = getimagesize($filename); 

if ($width >= $height) 
{ 
    $config['width'] = 800; 
} 
else 
{ 
    $config['height'] = 800; 
} 

$config['master_dim'] = 'auto'; 

Answer 2

感谢@Rpojka为您解答。但我用exif_read_data（）修复了它。这里是我的代码：

$config['upload_path'] = './uploads/'; 
    $config['allowed_types'] = 'jpg|jpeg|gif|png'; 
    $config['max_size'] = '6048'; 
    $this->load->library('upload', $config); 

    //check if a file is being uploaded 
    if(strlen($_FILES["testimg"]["name"])>0){ 

     if (!$this->upload->do_upload("testimg"))//Check if upload is unsuccessful 
     { 
      $error = array('error' => $this->upload->display_errors()); 
      print_r($errors); 
     } 
     else 
     { 

      $config['image_library'] = 'gd2'; 
      $config['source_image'] = $this->upload->upload_path.$this->upload->file_name; 
      $filename = $_FILES['testimg']['tmp_name']; 


      $imgdata=exif_read_data($this->upload->upload_path.$this->upload->file_name, 'IFD0'); 


      list($width, $height) = getimagesize($filename); 
      if ($width >= $height){ 
       $config['width'] = 800; 
      } 
      else{ 
       $config['height'] = 800; 
      } 
      $config['master_dim'] = 'auto'; 


      $this->load->library('image_lib',$config); 

      if (!$this->image_lib->resize()){ 
       echo "error"; 
      }else{ 

       $this->image_lib->clear(); 
       $config=array(); 

       $config['image_library'] = 'gd2'; 
       $config['source_image'] = $this->upload->upload_path.$this->upload->file_name; 


       switch($imgdata['Orientation']) { 
        case 3: 
         $config['rotation_angle']='180'; 
         break; 
        case 6: 
         $config['rotation_angle']='270'; 
         break; 
        case 8: 
         $config['rotation_angle']='90'; 
         break; 
       } 

       $this->image_lib->initialize($config); 
       $this->image_lib->rotate(); 

      } 
     }  
    } 

这里是EXIF方向图

1  2  3  4   5   6   7   8 

888888 888888  88 88  8888888888 88     88 8888888888 
88   88  88 88  88 88  88 88   88 88  88 88 
8888  8888 8888 8888 88   8888888888 8888888888   88 
88   88  88 88 
88   88 888888 888888