上传图片

飞翔发表于 2010-8-24 10:34:19

<?php

//详细代码以下，在upload_img() 调用$this->create_thumbnail();和$this->img_resize();时后者的会失效，两个函数的前后那个函数调用失效啊，都是后边哪个函数可以调用，不知道原因，昐各位高手指点，多谢。

class Upload extends Controller {

function Upload()
{
parent::Controller();
$this->load->library('image_lib');
$this->load->helper(array('form', 'url'));
}

function index()
{
$this->load->view('upload_form', array('error' => ' ' ));
}
function do_upload()
{

$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|jpeg|png';
$config['max_size'] = '2048';
$config['max_width'] = '0';
$config['max_height'] = '0';
$config['encrypt_name'] = TRUE;
$this->load->library('upload', $config);
if(!$this->upload->do_upload()){
echo $this->upload->display_errors();
}else {
$file_info = $this->upload->data();
$this->create_thumbnail($file_info['file_name'],$file_info['image_width'],$file_info['image_height']);
$this->img_resize($file_info['file_name'],$file_info['image_width'],$file_info['image_height']);
$data_img['goods_image'] = $file_info['file_name'];
$data_img['thumb_image'] = 'thumb/'.$file_info['raw_name'] . '_thumb' . $file_info['file_ext'];
//return $data_img;
//print_r($data_img);
$this->load->view('upload_success', $data_img);
}
}
//缩略图
private function create_thumbnail($file_name,$image_width,$image_height) {
$set_thumb_width = 100;
$set_thumb_height = 75;
$config['image_library'] = 'gd2';
$config['source_image'] ='./uploads/' . $file_name;
$config['new_image'] = './uploads/thumb/' . $file_name;                //没有生产缩略图
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
if($image_width > $set_thumb_width or $image_height > $set_thumb_height){
$config['width'] = $set_thumb_width;
$config['height'] = $set_thumb_height;
}

$this->load->library('image_lib', $config);                   ////////加载

if(!$this->image_lib->resize()){

echo $this->image_lib->display_errors();
}
unset($config);

$this->image_lib->clear();
}
//调整图像大小
function img_resize($file_name,$image_width,$image_height) {
$set_width = 200;
$set_height = 200;
$config['image_library'] = 'gd2';
$config['source_image'] = './uploads/' . $file_name;
$config['new_image'] = './uploads/image/' . $file_name;
$config['create_thumb'] = FALSE;
$config['maintain_ratio'] = TRUE;
if($image_width > $set_width or $image_height > $set_height){
$config['width'] = $set_width;
$config['height'] = $set_height;
}

//$this->load->library('image_lib', $config);
$this->image_lib->initialize($config);                                  ////////加载
if(!$this->image_lib->resize()){
echo $this->image_lib->display_errors();
}
unset($config);
$this->image_lib->clear();
}
}

没有报错误，在指定文件夹里面没有生产缩略图。什么原因呢？

visvoy 发表于 2010-8-24 10:43:24

第二次要用->image_lib->initialize($config)配置

飞翔发表于 2010-8-26 14:16:12

回复 2# visvoy

我第二次就是用哪个image_lib->initialize($config)配置。

飞翔发表于 2010-8-26 14:19:29

回复 2# visvoy

/ /调整图像大小
这个是不是第二次调用呢？您在帮我看看啊。谢谢啊！

visvoy 发表于 2010-8-26 14:33:59

->load->library只有效一次，你debug看有没有多次使用->load->lib的情况

飞翔发表于 2010-9-7 11:39:42

上传图片判断是否为空
function add_goods() {
   $config['upload_path'] = './public/data/goods_images/full/';
   $config['allowed_types'] = 'jpg|png';
   $config['max_size'] = '300';
   $config['max_width']= '1024';
   $config['max_height']= '768';
   $config['encrypt_name']='TRUE';
   $this->load->library('upload', $config);
if(array_key_exists ( 'pic' , $_POST ) && isset($_POST['pic'])){                   //判断上传图片是否为空
   if (!$this->upload->do_upload('pic')) {
      $this->admin_model->info(4,'抱歉，图片上传失败。可能您选择的图片大小超出了限制。请返回重新上传。','back');
//echo $this->upload->display_errors();
   }else {
         $data = array('upload_data' => $this->upload->data());//上传文件信息
         $imgname=$data['upload_data']['file_name'];          //上传后的文件名(包括扩展名);
         $this->load->library('image_lib');
         $config['image_library'] = 'GD2';
         $config['source_image'] = "public/data/goods_images/full/{$imgname}";
         $config['new_image'] = "public/data/goods_images/thumb/{$imgname}";
         $config['width'] = 100;
         $config['height'] = 100;
         $config['quality']='90%';
         $this->image_lib->initialize($config);
         $this->image_lib->resize(); //生成缩略图
         $goods_data['pic']='full/'.$imgname; //新闻完整图片路径
         $goods_data['shortpic']='thumb/'.$imgname;//新闻缩略图路径
   }
}else {
      $goods_data['pic']=''; //新闻完整图片路径
         $goods_data['shortpic']='';//新闻缩略图路径
}
         $goods_data['name']=$_POST['name'];//名称
         $goods_data['pen_name']=$_POST['pen_name'];//别名称
         $goods_data['type_id']=$_POST['type_id'];//频道类型
         $goods_data['outtime']=$_POST['outtime'];//发表时间
         $goods_data['out_name']=$_POST['out_name'];//作者
         $goods_data['level']=$_POST['level'];//排序
         $goods_data['root_in']=$_POST['root_in'];//来源
         $goods_data['tag']=$_POST['tag'];//tag
         $goods_data['short_desc']=$_POST['short_desc'];//概要简介
         $goods_data['contents']=$_POST['content'];//详细简介
         $goods_data['out_new']=$_POST['out_new'];//外连接
         $goods_data['created_at']=date('Ymd His');//添加时间
         $goods_data['update_at']=date('Ymd His');//修改时间

         if($this->admin_model->add('news',$goods_data)>0) { //如果插入数据成功
            $this->admin_model->info(2,'您已经成功地添加了。',site_url().'admin/goods/');
         }
         else {
            $this->admin_model->info(4,'抱歉，无法添加商品。','back');
         }
}

谢谢朋友帮助！

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上传图片