这篇文章主要为大家详细介绍了php基于CodeIgniter实现图片上传、剪切功能，具有参考价值，感兴趣的朋友可以参考一下。

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：

1. <?php
2. defined('BASEPATH') OR exit('No direct script access allowed');
3. class Index extends MY_Controller {
4. function __construct(){
5. parent::__construct();
6. $this->load->helper(array('form', 'url'));
7. }
8. /**
9. * 首页
10. */
11. public function index() {
12. $this->load->view('upload_form', array('error' => ' ' ));
13. }
14. public function do_upload()
15. {
16. $config['upload_path'] = './data/uploads/';
17. $config['allowed_types'] = 'gif|jpg|png';
18. $config['max_size'] = 100;
19. $config['max_width'] = 1024;
20. $config['max_height'] = 768;
21. $this->load->library('upload', $config);
22. if ( ! $this->upload->do_upload('userfile'))
23. {
24. $error = array('error' => $this->upload->display_errors());
25. $this->load->view('upload_form', $error);
26. }
27. else
28. {
29. $data = array('upload_data' => $this->upload->data());
30. $this->load->library('image_lib');
31. list($width, $height) = getimagesize($data['upload_data']['full_path']);
32. $config['image_library'] = 'gd2';
33. $config['source_image'] = $data['upload_data']['full_path'];
34. $config['maintain_ratio'] = TRUE;
35. if($width >= $height)
36. {
37. $config['master_dim'] = 'height';
38. }else{
39. $config['master_dim'] = 'width';
40. }
41. $config['width'] = 180;
42. $config['height'] = 180;
43. $this->image_lib->initialize($config);
44. $this->image_lib->resize();
45. $config['maintain_ratio'] = FALSE;
46. if($width >= $height)
47. {
48. $config['x_axis'] = floor(($width * 180 / $height - 180)/2);
49. }else{
50. $config['y_axis'] = floor(($height * 180 / $width - 180)/2);
51. }
52. $this->image_lib->initialize($config);
53. $this->image_lib->crop();
54. $this->load->view('upload_success', $data);
55. }
56. }
57. }