A question about PHP

PHPcode $ P_S_T $ t_array [0] + $ t_array [1]; $ timestamptime (); session_start (); $ ll_nowtime $ timestamp; if (session_is_registered ('ll _ lasttime ') {$ ll_lasttime $ _ SE 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: Refresh the page more than 5 times in 3 seconds and direct it to the local http: // 127.0.0.1
A piece of code widely circulated on the Internet, but it is clear that this code is wrong, because // has been used for commenting, so how can I change this code to be used normally?
I am not very familiar with PHP, so please correct it. thank you. I don't have much to score. I can only score 30.

------ Solution --------------------
Incorrect quotation marks. the quotation marks of the code on the first floor are Chinese single quotes, not English single quotes...
------ 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, this is a cc protection program
An error is reported when the program provided by the landlord runs locally. after a slight modification, it can be run after testing.

Session_start (); // enable session
$ Timestamp = time ();
$ Ll_nowtime = $ timestamp;

// Determine whether a session exists. if a session exists, assign an initialization value if it does not exist.
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;
}

// Current Time-start logon time to determine if frequent logon jumps or the session is assigned a value
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;
}
?>