图片上传--base64

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
include_once (APPPATH . "controllers/admin/Auth.php");
include_once (APPPATH.'libraries/PicUpload.php');
class goodsInfo extends Auth { 
    //产品修改
    public function edit(){
        $tid=$this->newrow['tid'];
        //获取待修改的商品详细图片信息
        $ree['info']=$this->db->select('*')->from('goods_info')->where(array('tid'=>$tid))->get()->result_array();
        //根据id从硬盘上删除产品原图及缩略图和产品成分图片
        $pic=$this->db->select('ingredients,origin_pic,home_pic,product_cat_pic,detail_pic,cart_pic')
                ->from('goods_info')
                ->where(array('tid'=>$tid))
                ->get()
                ->result_array();
        $picture_upload=new PicUpload();
        if(!empty($this->newrow['origin_pic'])){
            unlink(OMG.ORIGIN.$pic[0]['origin_pic']);
            unlink(OMG.HOME.$pic[0]['home_pic']);
            unlink(OMG.PRODUCT.$pic[0]['product_cat_pic']);
            unlink(OMG.DETAIL.$pic[0]['detail_pic']);
            unlink(OMG.CART.$pic[0]['cart_pic']);

            $pic=$_POST['origin_pic'];
            //文件上传保存路径
            $image_file=OMG.ORIGIN;

            $upload_url=$picture_upload->pUpload($pic,'pic2',$image_file);
            $origin_pic=$upload_url['url_pic'];
            $origin_thumb_pic=OMG.ORIGIN.$origin_pic;
            $thumb_name=$upload_url['pri'];
            if(!$upload_url){
                responseMsg ( 1, "图片上传失败！", null, 1, $this->prefix );
                $this->db->trans_rollback();
                return FALSE;
            }

            for($i=1;$i<5;$i++){
                if($i==1){
                      $width = 408;
                      $height = 408;
                      //缩略后的保存路径
                      $save_home_pic=OMG.HOME."{$thumb_name}.png";
                      $home_pic="{$thumb_name}_thumb.png";
                      //生成缩略图1
                      //$origin_thumb_pic  要缩略的原图路径
                      $this->dealthumb($origin_thumb_pic,$save_home_pic,$width,$height);
                }elseif($i==2){
                      $width = 270;
                      $height = 270;
                      //缩略后的保存路径
                      $save_product_cat_pic=OMG.PRODUCT."{$thumb_name}.png";
                      $product_cat_pic="{$thumb_name}_thumb.png";
                      //生成缩略图2
                      //$origin_thumb_pic  要缩略的原图路径
                      $this->dealthumb($origin_thumb_pic,$save_product_cat_pic,$width,$height);
                }elseif($i==3){
                      $width = 680;
                      $height = 680;
                      //缩略后的保存路径
                      $save_detail_pic=OMG.DETAIL."{$thumb_name}.png";
                      $detail_pic="{$thumb_name}_thumb.png";
                      //生成缩略图3
                      //$origin_thumb_pic  要缩略的原图路径
                      $this->dealthumb($origin_thumb_pic,$save_detail_pic,$width,$height);
                }else{
                      $width = 170;
                      $height= 170;
                      //缩略后的保存路径
                      $save_cart_pic=OMG.CART."{$thumb_name}.png";
                      $cart_pic="{$thumb_name}_thumb.png";
                      //生成缩略图4
                      //$origin_thumb_pic  要缩略的原图路径
                      $this->dealthumb($origin_thumb_pic,$save_cart_pic,$width,$height);
                }
            }
        }else {
            $origin_pic = $ree['info'][0]['origin_pic'];
            $home_pic = $ree['info'][0]['home_pic'];
            $product_cat_pic = $ree['info'][0]['product_cat_pic'];
            $detail_pic = $ree['info'][0]['detail_pic'];
            $cart_pic = $ree['info'][0]['cart_pic'];

            //添加图片1
            $pic = $_POST['ingredients'];
            //文件上传保存路径
            $image_file = OMG . INGREDIENTS;
        }
        responseMsg ( 0, "success",null, 1,$this->prefix );
    }
   /*
    * 生成缩略图
    * @param  $path 原图的本地路径
    * @param  $newPath 缩略图存储路径
    */
    private function dealthumb($path,$newPath,$width,$height){
        $config['image_library'] = 'gd2';
        $config['source_image'] = $path;
        $config['new_image'] = $newPath;
        $config['create_thumb'] = TRUE;
        //生成的缩略图将在保持纵横比例 在宽度和高度上接近所设定的width和height
        $config['maintain_ratio'] = TRUE;
        $config['width'] = $width;
        $config['height'] = $height;
        //载入图像处理类库
        $this->load->library('Image_lib');
        $this->image_lib->initialize($config);
        $this->image_lib->resize();
        $this->image_lib->clear();
    }
}

gmapiframeworkapplicationlibrariesPicUpload.php

<?php
$file = substr( $_SERVER["SCRIPT_FILENAME"], 0, stripos($_SERVER["SCRIPT_FILENAME"], "framework") );
require_once("{$file}/config.php");
class PicUpload{    
   /**
    * $pic  $name  $image_file
    */
    public function pUpload($pic,$name, $image_file){     
        $url_pic=array();
        //上传图片
        if(!empty($pic)){
            $url_pic=$this->upload($pic,$name,$image_file);
            if(empty($url_pic)){
                  return false;
            }
        }               
        $url=array(
            url_pic=>$url_pic['image_name'],
            pri=>$url_pic['pri']
        );
        return $url;
        
    }
    //字符串转图片
    private function upload($base64_image,$name,$image_file){               
        $file_size=strlen($base64_image);    //4.8kb 4925  8k
        // 验证文件条件是否符合
        if($file_size<= 0){ # 未上传文件
               return false;
        }
        if($file_size>= 4088000){ # 图片大于400KB，结束传输
               return false;
        }
        $base64_image = str_replace(' ', '+',$base64_image);//post
        if (preg_match('/^(data:s*image/(w+);base64,)/', $base64_image, $result)){
               //匹配成功
               if($result[2] == 'jpeg'){
                     $pri=date(YmdHis).$name;
                     $image_name =$pri .'.png';
               }else{
                     $pri=date(YmdHis).$name;
                     $image_name =$pri.'.'.$result[2];
               }
               $image_file_1="{$image_file}{$image_name}";
               //服务器文件存储路径
               //$image_file_1  要写入数据的文件。如果文件不存在，则创建一个新文件。
               //base64_decode(str_replace($result[1], '', $base64_image)) 要写入文件的数据。可以是字符串、数组或数据流。
               if(file_put_contents($image_file_1, base64_decode(str_replace($result[1], '', $base64_image)))){
                     $data['image_name'] = $image_name;
                     $data['pri']=$pri;
                     return $data;
               }else{
                     return false;
               }                
        }else{
               return false;
        }
    }
}