本文实例为大家分享了codeigniter 图片上传、剪切，控制器类，供大家参考，具体内容如下

defined('BASEPATH') OR exit('No direct script access allowed');

class Index extends MY_Controller {

function __construct(){

parent::__construct();

$this->load->helper(array('form', 'url'));

}

/**

* 首页

*/

public function index() {

$this->load->view('upload_form', array('error' => ' ' ));

}

public function do_upload()

{

$config['upload_path'] = './data/uploads/';

$config['allowed_types'] = 'gif|jpg|png';

$config['max_size'] = 100;

$config['max_width'] = 1024;

$config['max_height'] = 768;

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

if ( ! $this->upload->do_upload('userfile'))

{

$error = array('error' => $this->upload->display_errors());

$this->load->view('upload_form', $error);

}

else

{

$data = array('upload_data' => $this->upload->data());

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

list($width, $height) = getimagesize($data['upload_data']['full_path']);

$config['image_library'] = 'gd2';

$config['source_image'] = $data['upload_data']['full_path'];

$config['maintain_ratio'] = TRUE;

if($width >= $height)

{

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

}else{

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

}

$config['width'] = 180;

$config['height'] = 180;

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

$this->image_lib->resize();

$config['maintain_ratio'] = FALSE;

if($width >= $height)

{

$config['x_axis'] = floor(($width * 180 / $height - 180)/2);

}else{

$config['y_axis'] = floor(($height * 180 / $width - 180)/2);

}

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

$this->image_lib->crop();

$this->load->view('upload_success', $data);

}

}

}

以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。