A question about PHP

A question about PHP

PHP Code

  
   $P _s_t = $t _array[0] + $t _array[1]; $timestamp = time (); Session_Start (); $ll _nowtime = $timestamp; if (session_is_ Registered (' Ll_lasttime ')) {  $ll _lasttime = $_session[' ll_lasttime '];  $ll _times = $_session[' ll_times ') + 1;  $_session[' ll_times '] = $ll _times;} else{  $ll _lasttime = $ll _nowtime;  $ll _times = 1;  $_session[' ll_times '] = $ll _times;  $_session[' ll_lasttime '] = $ll _lasttime;} if (($ll _nowtime– $ll _lasttime) <3) {  if ($ll _times>=5) {    header (sprintf ("Location:%s", '/HTTP/ 127.0.0.1′));    Exit;  }} else{  $ll _times = 0;  $_session[' ll_lasttime '] = $ll _nowtime;  $_session[' ll_times '] = $ll _times;}

Main function: in 3 seconds continuously refresh the page 5 times will point to the native http://127.0.0.1
The internet widely circulated a code, but obviously this code is wrong, because//has played a role in the annotation, then how to change this code to use it properly?
Not familiar with PHP, so please master correction, thank you, the points are not much, can only give 30 points.

------Solution--------------------
Quotation marks are wrong, the 1 floor of the code is quoted in Chinese single quotation marks, not in English single quotation marks ...
------Solution--------------------
Correct code:

Date_default_timezone_set (' PRC ');
$timestamp = time ();
Session_Start ();
$ll _nowtime = $timestamp;
if (Isset ($ll _nowtime)) {
$ll _lasttime = $_session[' ll_lasttime ');
$ll _times = $_session[' ll_times ') + 1;
$_session[' ll_times '] = $ll _times;
}else{
$ll _lasttime = $ll _nowtime;
$ll _times = 1;
$_session[' ll_times '] = $ll _times;
$_session[' ll_lasttime '] = $ll _lasttime;
}

if (($ll _nowtime-$ll _lasttime) <3) {
if ($ll _times>=5) {
Header (sprintf ("Location:%s", ' http://127.0.0.1 '));
Exit ();
}
}else{
$ll _times = 0;
$_session[' ll_lasttime '] = $ll _nowtime;
$_session[' ll_times '] = $ll _times;
}
?>
------Solution--------------------
Google a bit, this is a prevent CC program
Landlord provides the program in the local run error, slightly modified, tested to run

Session_Start (); Open session
$timestamp = time ();
$ll _nowtime = $timestamp;

Determine if the session exists if there is a value from session, if there is no initialization assignment
if ($_session) {
$ll _lasttime = $_session[' ll_lasttime ');
$ll _times = $_session[' ll_times ') + 1;
$_session[' ll_times '] = $ll _times;
}else{
$ll _lasttime = $ll _nowtime;
$ll _times = 1;
$_session[' ll_times '] = $ll _times;
$_session[' ll_lasttime '] = $ll _lasttime;
}

Now time-Start login time to make a judgment if the login frequently jumps or otherwise assigns a value to the session
if (($ll _nowtime-$ll _lasttime) < 3) {
if ($ll _times>=5) {
Header ("location:http://www.baidu.com");
Exit
}
}else{
$ll _times = 0;
$_session[' ll_lasttime '] = $ll _nowtime;
$_session[' ll_times '] = $ll _times;
}
?>

