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，具体内容如下

/**

• 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。

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