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
<?php
defined('BASEPATH')ORexit('Nodirectscriptaccessallowed');
classIndexextendsMY_Controller{
function__construct(){
parent::__construct();
$this->load->helper(array('form','url'));
}
/**
*首页
*/
publicfunctionindex(){
$this->load->view('upload_form',array('error'=>''));
}
publicfunctiondo_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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