将单个图像编码为多个调整大小

Question

我是Codeigniter的新手.这就是我想要做的:

1. 用户上传个人资料照片.
2. 我将原始图像调整为几种尺寸,例如400×300,200×200和32×32.

但是,当我上传图片时,我只能为一个尺寸400×300 重新调整尺寸.

这是我的代码:

 $config['image_library']   = 'gd2';
 $config['source_image']    = '/path/to/image/mypic.jpg';
 $config['create_thumb']    = TRUE;
 $config['maintain_ratio']  = TRUE;
 $config['width']           = 400;
 $config['height']          = 300;
 $config['new_image']   = 400x300image;
 $this->load->library('image_lib', $config); 
 $this->image_lib->resize();
 $this->image_lib->clear()

 $config['image_library']   = 'gd2';
 $config['source_image']    = '/path/to/image/mypic.jpg';
 $config['create_thumb']    = TRUE;
 $config['maintain_ratio']  = TRUE;
 $config['width']           = 200;
 $config['height']          = 200;
 $config['new_image']   = 200x200image;
 $this->load->library('image_lib', $config); 
 $this->image_lib->resize();
 $this->image_lib->clear()

 $config['image_library']   = 'gd2';
 $config['source_image']    = '/path/to/image/mypic.jpg';
 $config['create_thumb']    = TRUE;
 $config['maintain_ratio']  = TRUE;
 $config['width']           = 32;
 $config['height']          = 32;
 $config['new_image']   = 32x32image;
 $this->load->library('image_lib', $config); 
 $this->image_lib->resize();
 $this->image_lib->clear();

我尝试使用不同的配置名称$config2,$config3但我没有得到输出.

请帮我解决这个问题.

Answer 1

我在我的一个CI应用程序中内置了类似的功能.在我的情况下,我需要另一个函数中的配置文件,所以我构建了单独的版本.

不要多次加载库.一旦没事.只需每次使用新配置重新初始化库.

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

 /* First size */
 $configSize1['image_library']   = 'gd2';
 $configSize1['source_image']    = '/path/to/image/mypic.jpg';
 $configSize1['create_thumb']    = TRUE;
 $configSize1['maintain_ratio']  = TRUE;
 $configSize1['width']           = 400;
 $configSize1['height']          = 300;
 $configSize1['new_image']   = '400x300image';

 $this->image_lib->initialize($configSize1);
 $this->image_lib->resize();
 $this->image_lib->clear();

 /* Second size */    
 $configSize2['image_library']   = 'gd2';
 $configSize2['source_image']    = '/path/to/image/mypic.jpg';
 $configSize2['create_thumb']    = TRUE;
 $configSize2['maintain_ratio']  = TRUE;
 $configSize2['width']           = 200;
 $configSize2['height']          = 200;
 $configSize2['new_image']   = '200x200image';

 $this->image_lib->initialize($configSize2);
 $this->image_lib->resize();
 $this->image_lib->clear();

等等.我想,为了记忆,你可以取消设置并重置配置文件,如上所述,但是如果你打算像我一样在单独的控制器方法中使用图像大小调整,我发现单独保存它们会很有帮助.