多圖像大小調整在笨一次，將無法正常工作

Question

我想同樣的功能中上傳不同尺寸的圖像，並重新大小他們。但是會發生什麼情況是，只有一個重新調整大小，而另一個則不行。我的代碼是：

function do_upload() 
{ 
    $this_user = $this->auth->info;if(!is_dir('./uploads/'.$this_user->username)){ 
     mkdir('./uploads/'.$this_user->username); 
     mkdir('./uploads/'.$this_user->username.'/photos'); 
     mkdir('./uploads/'.$this_user->username.'/photos/master'); 
     mkdir('./uploads/'.$this_user->username.'/photos/small'); 
     mkdir('./uploads/'.$this_user->username.'/photos/medium'); 
     mkdir('./uploads/'.$this_user->username.'/photos/large'); 
     mkdir('./uploads/'.$this_user->username.'/photos/xlarge'); 
    } 
    $config['upload_path'] = './uploads/'.$this_user->username.'/photos/master/'; 
    $config['allowed_types'] = 'gif|jpg'; 

    $title = $this->input->post('title'); 
    $this->load->library('upload', $config); 
    if (! $this->upload->do_upload()) 
    { 
     echo '<div id="status">error</div>'; 
     echo '<div id="message">'. $this->upload->display_errors() .'</div>'; 
    } 
    else 
    { 
     $data = array('upload_data' => $this->upload->data()); 
     //resizing begins 
      $image_width = $data['upload_data']['image_width']; 
      $image_height = $data['upload_data']['image_height']; 
      $full_path = $data['upload_data']['full_path']; 
      //checking for width 
      if($image_width>5000){ 
       $config['image_library'] = 'gd2'; 
       $config['source_image'] = $full_path; 
       //$config['create_thumb'] = TRUE; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 5000; 
       //$config['height'] = 50; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/xlarge'; 
       $this->load->library('image_lib', $config); 
       $this->image_lib->resize(); 
      } 
      if($image_width>=4500){ 
       $config['image_library'] = 'gd2'; 
       $config['source_image'] = $full_path; 
       //$config['create_thumb'] = TRUE; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 4500; 
       //$config['height'] = 50; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/large'; 
       $this->load->library('image_lib', $config); 
       $this->image_lib->resize(); 
      } 
      if($image_width>=2000){ 
       $config['image_library'] = 'gd2'; 
       $config['source_image'] = $full_path; 
       //$config['create_thumb'] = TRUE; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 2000; 
       //$config['height'] = 50; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/medium'; 
       $this->load->library('image_lib', $config); 
       $this->image_lib->resize(); 
      } 
      if($image_width>=800){ 
       $config['image_library'] = 'gd2'; 
       $config['source_image'] = $full_path; 
       //$config['create_thumb'] = TRUE; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 800; 
       //$config['height'] = 50; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/small'; 
       $this->load->library('image_lib', $config); 
       $this->image_lib->resize(); 
      } 
     //resizing ends 
     echo '<div id="status">success</div>'; 
     //then output your message (optional) 
     echo '<div id="message">'. $data['upload_data']['file_name'].$this->input->post('type').' Successfully uploaded.</div>'; 
     //pass the data to js 
     echo '<div id="upload_data">'. json_encode($data) . '</div>'; 

    } 
} 

我在做什麼錯在這裏？

Answer 1

你需要確保你叫$this->image_lib->clear();，因爲它重置圖像處理類的初始化。請參閱：http://codeigniter.com/user_guide/libraries/image_lib.html

Answer 2

這實際上爲我工作。我正在做的是多次加載庫。我應該加載庫一次並初始化配置爲每個重新尺寸。這裏是爲我工作的代碼。

function do_upload() 
{ 
    $this_user = $this->auth->info; 
    if(!is_dir('./uploads/'.$this_user->username)){ 
     mkdir('./uploads/'.$this_user->username); 
     mkdir('./uploads/'.$this_user->username.'/photos'); 
     mkdir('./uploads/'.$this_user->username.'/photos/master'); 
     mkdir('./uploads/'.$this_user->username.'/photos/small'); 
     mkdir('./uploads/'.$this_user->username.'/photos/medium'); 
     mkdir('./uploads/'.$this_user->username.'/photos/large'); 
     mkdir('./uploads/'.$this_user->username.'/photos/xlarge'); 
    } 
    $config['upload_path'] = './uploads/'.$this_user->username.'/photos/master/'; 
    $config['allowed_types'] = 'gif|jpg'; 
    $title = $this->input->post('title'); 
    $this->load->library('upload', $config); 
    if (! $this->upload->do_upload()) 
    { 
     echo '<div id="status">error</div>'; 
     echo '<div id="message">'. $this->upload->display_errors() .'</div>'; 
    } 
    else 
    { 
     $data = array('upload_data' => $this->upload->data()); 
     //resizing begins 
      $image_width = $data['upload_data']['image_width']; 
      $image_height = $data['upload_data']['image_height']; 
      $full_path = $data['upload_data']['full_path']; 
      //checking for width 
      $this->load->library('image_lib'); 
      if($image_width>5000){ 
       $config['source_image'] = $full_path; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 5000; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/xlarge'; 
       $this->image_lib->initialize($config); 
       $this->image_lib->resize(); 
       $this->image_lib->clear(); 
       $aa = 'xlarge '; 
      } 
      if($image_width>=4500){ 
       $config['source_image'] = $full_path; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 4500; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/large'; 
       $this->image_lib->initialize($config); 
       $this->image_lib->resize(); 
       $this->image_lib->clear(); 
       $aa .= 'large'; 
      } 
      if($image_width>=2000){ 
       $config['source_image'] = $full_path; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 2000; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/medium'; 
       $this->image_lib->initialize($config); 
       $this->image_lib->resize(); 
       $this->image_lib->clear(); 
       $aa .= 'medium'; 
      } 
      if($image_width>=800){ 
       $config['source_image'] = $full_path; 
       $config['maintain_ratio'] = TRUE; 
       $config['width'] = 800; 
       $config['new_image'] = './uploads/'.$this_user->username.'/photos/small'; 
       $this->image_lib->initialize($config); 
       $this->image_lib->resize(); 
       $this->image_lib->clear(); 
       $aa .= 'small'; 
      } 
     //resizing ends 
     echo '<div id="status">success</div>'; 
     //then output your message (optional) 
     echo '<div id="message">'. $data['upload_data']['file_name'].$aa.' Successfully uploaded.</div>'; 
     //pass the data to js 
     echo '<div id="upload_data">'. json_encode($data) . '</div>'; 

    } 
}