Php verifies logon timeout function

If the time of the action times out, it is kicked out! Mktime is a good time computing function that facilitates time difference calculation. The minimum unit is seconds. Function & lt ;? Phpfunctionuser_mktime ($ onlinetime) {& nbsp; $ new_timemktime (); & nbsp; & pass the action time, if the action time times out, it will be kicked out! Using mktime is a good time computing function.
Time difference can be easily calculated. The minimum unit is seconds.

Function
Function user_mktime ($ onlinetime ){
$ New_time = mktime ();
Echo $ new_time-$ onlinetime;
If ($ new_time-$ onlinetime & gt; 100 ){
Echo "logon timeout ";
Session_destroy ();
} Else {
$ _ SESSION [times] = mktime ();
}
}
?>