php 图片压缩处理

<?php

require dirname(__FILE__).'/../includes/common.inc.php';
    $_clean = array();
    $_info = array();
    $_data = array();
    $_clean['shopId'] =_check($_POST['shopId']);
    $_clean['userId'] =_check($_POST['userId']);
    $oldpic = $_FILES['picFile']['tmp_name'];
    if ( $_clean['shopId']!='' && $_clean['userId']!='' ) {
        $_info['state'] = 0;
        $_info['info'] = '';
        $max_file_size=500000;  //大小500kb
        if($max_file_size <$oldpic["size"]){  
            $_info['state'] = 2;
            $_info['info'] = '文件太大';
            echo _json($_info);
            die;
            }else{
                $_sql1 = "SELECT * FROM tb_easy_Comments WHERE user = '{$_clean['userId']}' and contentId = '{$_clean['contentId']}'";
                $_result1 = _query($_sql1);
                $_row1 = _num_rows($_result1);
                    if ( $_row1 > 0 ) {
                    $_info['state'] = 0;
                    $_info['info'] = '您已经评论过';
                    echo _json($_info);
                    die;
                    }else{
                        $width = 200;
                        $height = 200;
                        header('Content-Type: image/jpeg,image/png,image/gif');
                        //获取到图片的宽和高
                        list($width_orig, $height_orig) = getimagesize($oldpic);
                        $ratio_orig = $width_orig/$height_orig;
                        //算比例
                        if ($width/$height > $ratio_orig) {
                           $width = $height*$ratio_orig;
                        } else {
                           $height = $width/$ratio_orig;
                        }
                        //创建
                        $image_p = imagecreatetruecolor($width, $height);
                        $image = imagecreatefrompng($oldpic);
                        imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
                        $pic = date('YmdHis').rand(1000,9999).'.'.jpg;
                        imagejpeg($image_p,"D:/www/web/php_easyhunt/images/easyCommentsPic/".$pic , 100);    
                        $_data['info'] ="http://". $_SERVER['SERVER_NAME'].'/images/easyCommentsPic/'.$pic;
                        $_info['data'] = $_data;
                        echo _json($_info);
                    }
            }    
    }else{
        $_data['state'] = 5;
        $_data['info'] = '参数有误！';
    }
    
    $_info['data'] = $_data;
    
    echo _json($_info);

//请勿删除以下内容   以后备用    
//    require dirname(__FILE__).'/../includes/common.inc.php';
//    $_clean = array();
//    $_info = array();
//    $_data = array();
//    $_clean['shopId'] =_check($_POST['shopId']);
//    $_clean['userId'] =_check($_POST['userId']);
//    
//    $oldpic = $_FILES['picFile']['name'];
//    //上传后的名称
//    $newpic = date('YmdHis').rand(1000,9999).$oldpic; 
//    
//    if ( $_clean['shopId']!='' && $_clean['userId']!='' ) {
//    
//        $_info['state'] = 0;
//        $_info['info'] = '';
//        $max_file_size=500000;  //大小500kb
//        if($max_file_size <$oldpic["size"]){  
//            $_info['state'] = 2;
//            $_info['info'] = '文件太大';
//            echo _json($_info);
//            die;
//            }
//            //接收文件目录  
//            $target_path = "D:/www/web/php_easyhunt/images/companyImages/";        
//            if(move_uploaded_file($_FILES['picFile']['tmp_name'], $target_path. $newpic)) { 
//            }
//            $_data['info'] ="http://". $_SERVER['SERVER_NAME'].'/images/companyImages/'.$newpic;    
//    }else{
//        $_data['state'] = 5;
//        $_data['info'] = '参数有误！';
////    }
//    
//    $_info['data'] = $_data;
//    
//    echo _json($_info);

//
//        $image_p = imagecreatetruecolor($width, $height);
//        $type = substr($_absolutePath,strrpos($_absolutePath, '.')+1); 
//       if($type == "jpg" || $type == "JPEG"||$type == "jpeg") {
//           $image = imagecreatefromjpeg($_absolutePath);
//       } else if ($type == "png") {
//           $image = imagecreatefrompng($_absolutePath);
//       } else if ($type == "gif") {
//           $image = imagecreatefromgif($_absolutePath);
//        }
//
//
//        function scaleImage(){
//        /*$_absolutePath="http://115.28.233.45/mobile_client".$_path;*/
//        $_absolutePath="http://115.28.233.45/mobile_client/imgs/comments/4_220/201412270932136d2fcd32-7764-4081-9ae5-6f85bbfadf71.JPEG";
//        $width = 200;
//        $height = 200;
//        header('Content-Type: image/jpeg,image/png,image/gif');
//        //获取到图片的宽和高
//        list($width_orig, $height_orig) = getimagesize($_absolutePath);
//        $ratio_orig = $width_orig/$height_orig;
//        //算比例
//        if ($width/$height > $ratio_orig) {
//            $width = $height*$ratio_orig;
//        } else {
//            $height = $width/$ratio_orig;
//        }
//        //创建
//        $image_p = imagecreatetruecolor($width, $height);
//        $type = substr($_absolutePath,strrpos($_absolutePath, '.')+1); 
//       if($type == "jpg" || $type == "JPEG"||$type == "jpeg") {
//           $image = imagecreatefromjpeg($_absolutePath);
//       } else if ($type == "png") {
//           $image = imagecreatefrompng($_absolutePath);
//       } else if ($type == "gif") {
//           $image = imagecreatefromgif($_absolutePath);
//        }
//       imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);
//       $pic ="smalll_".substr($_absolutePath,strrpos($_absolutePath, '/')+1);
//       imagejpeg($image_p,"imgs/comments/".$pic , 100);
//    }








?>