/*** 生成縮略圖* @param  $path 原圖的本地路徑* @return null 創建一個 原圖_thumb.擴展名 的文件**/public function dealthumb($path){    $config['image_library'] = 'gd2';    $config['source_image'] = $path;    $config['create_thumb'] = TRUE;    //生成的縮略圖將在保持縱橫比例 在寬度和高度上接近所設定的width和height    $config['maintain_ratio'] = TRUE;    $config['width'] = 80;    $config['height'] = 80;    $this->load->library('image_lib', $config);    $this->image_lib->resize();    $this->image_lib->clear();}/** 處理圖像旋轉*/public function transroate($path,$imgpath){    $this->load->library('image_lib');    //(必須)設置圖像庫    $config['image_library'] = 'gd2';    $newname = time().'_rote.jpg';    //設置圖像的目標名/路徑    $config['new_image'] =$imgpath.$newname;    //(必須)設置原始圖像的名字/路徑    $config['source_image'] = $path;    //決定新圖像的生成是要寫入硬盤還是動態的存在    $config['dynamic_output'] = FALSE;    //設置圖像的品質。品質越高，圖像文件越大    $config['quality'] = '90%';    //有5個旋轉選項 逆時針90 180 270 度 vrt 豎向翻轉 hor 橫向翻轉    $config['rotation_angle'] = 'vrt';    $this->image_lib->initialize($config);    if(@$this->image_lib->rotate()){      $this->image_lib->clear();      return $config['new_image'];    }else{      $this->image_lib->clear();      return '';    }}/*** 處理圖像水印*/public function overlay($path,$imgpath){    $this->load->library('image_lib');    $newname = time().'_over.jpg';    //設置新圖像名稱    $config['new_image'] =$imgpath.$newname;    //調用php gd庫 繪圖    $config['image_library'] = 'gd2';    //源圖像 本地地址    $config['source_image'] = $path;    //覆蓋文字    $config['wm_text'] = 'Copyright 2015 - Friker';    //覆蓋類型 文字/圖像    $config['wm_type'] = 'text';    //文字字體類型    //$config['wm_font_path'] = 'C:/Windows/Fonts/vrinda.ttf';    //字體大小    $config['wm_font_size'] = '16';    //字體顏色    $config['wm_font_color'] = 'ff0000';    //垂直方向距離頂端距離    $config['wm_vrt_alignment'] = '20';    //水平方向距離左端距離    $config['wm_hor_alignment'] = 'center';    //padding    $config['wm_padding'] = '20';    $this->image_lib->initialize($config);    if($this->image_lib->watermark()){      $this->image_lib->clear();      return $config['new_image'];    }else{      $this->image_lib->clear();      return '';    }}/***  處理圖片上傳*  文件上傳類 通過前臺 上傳文件*/public function uploadfile(){    //文件上傳部分    // 處理文件    // $data = '';    $this->load->helper('url');    $formpic = key($_FILES);    //文件處理部分    if(false === empty($_FILES[$formpic]['tmp_name'])){      //設置文件上傳的路徑      $upload['upload_path'] = "./public/img/";      //限制文件上傳的類型      $upload['allowed_types'] = 'jpeg|jpg|gif|png';      //限制文件上傳的大小      $upload['max_size'] = 2048;      //設置文件上傳的路徑      $upload['file_name'] = date('YmdHis', time()).rand(10000, 99999);      //加載文件上傳配置信息      $this->load->library('upload', $upload);      //處理文件上傳      $this->upload->do_upload($formpic);      //返回文件上傳信息      $image = $this->upload->data();      /*       'file_name' => string '2015071702051718388.jpg' (length=23)       'file_type' => string 'image/jpeg' (length=10)       'file_path' => string 'E:/wamp/www/testci/public/img/' (length=30)       'full_path' => string 'E:/wamp/www/testci/public/img/2015071702051718388.jpg' (length=53)       'raw_name' => string '2015071702051718388' (length=19)       'orig_name' => string '2015071702051718388.jpg' (length=23)       'client_name' => string 'u=415761610,1548338330&fm=116&gp=0.jpg' (length=38)       'file_ext' => string '.jpg' (length=4)       'file_size' => float 3.74       'is_image' => boolean true       'image_width' => int 146       'image_height' => int 220       'image_type' => string 'jpeg' (length=4)       'image_size_str' => string 'width="146" height="220"' (length=24)       */      //var_dump($image);      //返回文件上傳名字      $data = $image['file_name'];      $this->dealthumb($image['full_path']);      $this->overlay($image['full_path'],$image['file_path']);      $this->transroate($image['full_path'],$image['file_path']);//      $thumbdata = '';      //生成縮略圖名稱      $pos = strripos($image['file_name'], ".");      $newname = substr($image['file_name'], 0,$pos)."_thumb".substr($image['file_name'], $pos);      if(file_exists($image['file_path'].$newname)){        $thumbdata = $newname;      }    }    //$dirroot = $_SERVER['DOCUMENT_ROOT'];    //$this->dealthumb($dirroot."/public/img/".$data);    //上傳失敗    if(!$data){      echo json_encode(array('status'=>0,'msg'=>"上傳失敗！"));    }else{    //上傳成功      echo json_encode(array(        'name'=>$data,        'pic'=>base_url()."public/img/".$data,        'picthumb'=>$thumbdata == '' ?$data:$thumbdata        ));    }}

<!doctype html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0" /><link rel="stylesheet" href="/public/stylesheets/bootstrap.min.css" /><link rel="stylesheet" href="/public/stylesheets/bootstrap-responsive.min.css" /><link rel="stylesheet" href="/public/stylesheets/matrix-style.css" /><link rel="stylesheet" href="/public/stylesheets/matrix-media.css" /><script type="text/javascript" src="/public/javascripts/jquery.min.js"></script><script type="text/javascript" src="/public/javascripts/jquery.form.js"></script><script type="text/javascript" src="/public/javascripts/jquery.validate.js"></script><style type="text/css">body{background:#eeeeee; margin:0px;}</style></head><body><div class="control-group">  <label class="control-label"> 分享logo： </label>  <div class="controls">     <input type="file" name="sharepic" id="sharepic"/>     <input type="hidden" name="act_sharepic" value="" id="act_sharepic"/>(<sapn class="fred">最佳大小為 80 X 80 像素</sapn>)     <p style="margin:20px 0;"><img src="/public/img/default.png"  </div></div><script type="text/javascript">$(function () {  /*****************圖片上傳部分開始 *******************/  var act = "<form class='myupload' action='"+"<?php echo site_url('mytest/uploadfile');?>"+"' method='post' enctype='multipart/form-data'></form>";  $("#sharepic").change(function(){    $(this).wrap(act);    $(this).parent(".myupload").ajaxSubmit({      dataType: 'json',      success: function(data) {        var src = data.pic;        //更改預覽圖像地址        $('#sharepic_img').attr("src",src);        $('#act_sharepic').val(data.name);        $('#sharepic').unwrap();      },      error:function(xhr){        alert(JSON.parse(xhr));      }    });  });})</script></body></html>