php实现图片上传、剪切功能

本文实例为大家详细介绍了php实现图片上传、剪切功能的具体代码，供大家参考，具体内容

本文实例为大家详细介绍了php实现图片上传、剪切功能的具体代码，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。