How to use PHP encapsulation class to realize that image upload can be directly referenced

How to use PHP encapsulation class to realize that image upload can be directly referenced_PHP tutorial
WBOY
Release： 2016-07-20 11:17:17
Original
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class image {

    /**
     *完成图片的上传
     *
     *@param array $file 待上传的文件信息的数组，用于5个元素的那个数组
     *@return mixed 如果执行成功，返回上传了的文件名，否则返回false
     */
    public function upload($file) {

        if($file['error'] == 0) {
            $allow_types = array('image/jpeg', 'image/pjpeg', 'image/png', 'image/gif');
            if(in_array($file['type'], $allow_types)) {
                $maxsize = 2000000;
                if($file['size'] <= $maxsize) {
                    //上传
                    //需要将文件重命名，1，防止不规则的字符出现在文件名中，2，防止重名
                    //采用时间戳加随机数的形式
                    //后缀名如何获得？在原始文件名中获得后缀名
                    //在文件名中最后一个点截取到最后就是扩展名
                    //strrchr(在哪个字符串中查，查的字符串);
                    $new_filename = time() . mt_rand(10000, 99999) . strrchr($file['name'], '.');

                    //移动
                    //此函数返回移动成功还是失败
                    if(move_uploaded_file($file['tmp_name'],'images/'. $new_filename)) {
                        return $new_filename;
                    }
                }
            }
        }

        //只有一种情况返回文件名，其他全部返回false
        return false;
    }
}
?>

//-------------------------------------------------------------------------------------
<?php
header("content-type:text/html;charset=utf-8");
function __autoload($image){
        require_once($image.'.class.php');
}

    $image = new image();
    $user = $_POST['user'];
    $img = $_FILES['img'];
    //var_dump($img);
    $img = $image ->upload($img);
    mysql_connect('localhost','root','123');
    mysql_select_db('lyb');
    mysql_query('set names utf8');
    $q = "insert test_image(name,url) values('$user','$img')";
    //var_dump($q);
    $result = mysql_query($q);
                if($result){
                 
                   echo "添加成功.....<br /><br />";
                 }
                 else{
                   echo "添加失败。。。";
                 }
?>

//--------------------------------------------------------------------------------------

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>图片上传类</title>
</head>
<body>
<form enctype="multipart/form-data"  method="post" action="images.php">
姓名：<input type="text" name="user" id="user"/><br>
图片：<input type="file" name="img" id="img"/><br>
<input type="submit" value="提交"/>
</form>
</body>
</html>
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