圖像調整大小時，Codeigniter圖像旋轉

Question

我有一個尺寸爲（W-3000 X H-4000）的圖像。當我上傳並調整大小時，它總是顯示爲橫向模式，意味着新的尺寸是w-1067 X h-800。我想創建這張照片800X600的風景或600X800的肖像。這裏是我的代碼：

$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"; 
      } 
     }  
    } 

在我的代碼高度總是800px的大小。 3000X4000尺寸圖像可以。但是，當我使用4000X3000尺寸圖像時呢？任何人都可以幫我解決這個問題嗎？由於

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「自動」的參數，將決定其值越大 - 寬度或高度。

$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

感謝@Rpojka爲您解答。但我用exif_read_data（）修復了它。這裏是我的代碼：

$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(); 

      } 
     }  
    } 

這裏是EXIF方向圖

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88   88  88 88 
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