php基于CodeIgniter实现图片上传、剪切功能

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

<?php
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。