PHP的ImageMagick圖像的多個尺寸 - 無法讓它工作

Question

大家好：）預先感謝您對此問題的任何幫助。

我正在使用CodeIgniter，並且圖像上傳，旋轉和調整大小成功。 這是當我嘗試創建多個尺寸的圖像，我有點迷路。

這裏是我的代碼：

// First I make two copies of the origional image - there is no problem here - these always work. I always have the successfully copied images. 

       $Copy_Mid_Size_File = "Some_Path_For_The_Newly_Copied_Mid_Size_Image" 

       if(!copy($source_image, $Copy_Mid_Size_File)){ 
        echo "failed to copy $Copy_Mid_Size_File - Please contact the system administrator. \n"; 
        die(); 
       } 

       $Copy_Thumbnail_Size_File = "Some_Path_For_The_Newly_Copied_Thumbnail_Size_Image" 

       if(!copy($source_image, $Copy_Thumbnail_Size_File)){ 
        echo "failed to copy $Copy_Thumbnail_Size_File - Please contact the system administrator. \n"; 
        die(); 
       } 

       // Now I resize for the mid size image 
       $config['image_library'] = 'imagemagick';   
       $config['library_path'] = '/usr/bin'; 

       $config['source_image'] = $Copy_Mid_Size_File; 
       $config['maintain_ratio'] = TRUE; 
       $config['quality'] = '100%'; 
       $config['master_dim'] = 'auto'; 
       $config['width'] = 200; 
       $config['height'] = 200; 

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

       if(!$this->image_lib->resize()){ 
        echo $this->image_lib->display_errors();// This has never reported an error yet 
        echo "Image Re-size for Mid Size Image FAILED!";// This has never reported an error yet 
        die(); 
       }else{ 
        echo" Mid-Size Re-size Worked!"; 
       } 


       // Now I try to resize for the Thumbnail 
       $config['image_library'] = 'imagemagick';   
       $config['library_path'] = '/usr/bin'; 

       $config['source_image'] = $Copy_Thumbnail_Size_File; 

       $config['maintain_ratio'] = TRUE; 
       $config['quality'] = '100%'; 
       $config['master_dim'] = 'auto'; 
       $config['width'] = 50; 
       $config['height'] = 50; 

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

       if(!$this->image_lib->resize()){ 
        echo $this->image_lib->display_errors();// This has never reported an error yet 
        echo "Image Re-size for Thumbnail Size Image FAILED!";// This has never reported an error yet 
        die(); 
       }else{ 
        echo" Thumbnail Re-size Worked!"; 
       } 

我總是最後的圖像適當數量的正確命名 - 縮略圖只是不重新大小 - 沒有報告的錯誤。它總是說成功了。

如果我先將縮略圖重新調整大小代碼 - 縮略圖重新調整大小 - 但中等大小的圖像不會。

我意識到還有其他方法來加載庫 - 但我不明白爲什麼第一次重新大小的作品，但第二次沒有。

任何想法？

謝謝。 問候， 肯

Answer 1

你只需要一次加載庫，但你需要初始化它每一次新的配置。所以，你的代碼看起來就像這樣：

// load the library 
$this->load->library('image_lib'); 

// first image: 
// set some config 
$config['image_library'] = 'imagemagick'; 
... 

// initialize the library with this config 
$this->image_lib->initialize($config); 
// Do the resize: 
$this->image_lib->resize(); 

// clear the config: 
$this->image_lib->clear(); 

// second image: 
// set some config 
$config['image_library'] = 'imagemagick'; 
... 

// re-initialize the library with the new config 
$this->image_lib->initialize($config); 
// Do the resize: 
$this->image_lib->resize(); 

我懷疑你甚至可以只需更新$config['width']和$config['height']不必清楚，但我沒有測試過！

作爲一個方面說明，您並不需要首先將圖像複製到正確的目錄中;該笨圖像庫可以爲您創建一個新的，如果你設置你的配置是這樣的：

$config['new_image'] = '/path/to/new_image.jpg'; 

這將保存圖片到新的路徑，而不必所有的地方創建副本。

參考：http://codeigniter.com/user_guide/libraries/image_lib.html