mysql - PHP returning output of other user request -

i'm facing problem php response. used ajax 3 seconds delay check user's logs. when user account used simultaneously 2 users, 1 must kicked. used track log id in db if equal session. problem users getting kicked there no other user using his/her account. tried print_r query statements , returning different values. might response other users.

i'm using iis server , fastcgi php response.

can tell me how possible , give me ideas solve issue? thanks.

here of codes :

checking logs in db using ajax:

public function checklogstatus( $name, $email, $sess_code ) {       $qry = "select log $this->tablename name='$name' , email='$email'";     //when print statement returns different values of $name , $email      $result = mysql_query( $qry ) or die(mysql_error());       if( !$selresult = mysql_fetch_array($result) ) {         return false;     }      if(!isset($_session)) {         session_start();     }      if( !isset( $selresult['log'] ) && $selresult['log'] != '' ) {         if( $selresult['log'] != $sess_code ) {             //$_session['logs'] = 'used';             return false;         }     }      return true; } 

<?php session_start(); $_session['log'] = $log; setcookie("log",$log,time()*24*60*60); //expires after 24hrs ?> 

the function checklogstatus same mentioned above,

<?php public function checklogstatus( $name, $email, $sess_code ){ $qry = "select log $this->tablename name='$name' , email='$email'"; $result = mysql_query( $qry ) or die(mysql_error()); if( !$selresult = mysql_fetch_array($result) ){ return false; } if(!isset($_session)){ session_start(); } if( !isset( $selresult['log'] ) && $selresult['log'] != '' ){            if( $selresult['log'] != $sess_code ) {     return false; } }  return true; } ?> 

but while passing,

<?php checklogstatus( "myname", "contact@email.com", $_cookie['log'] ); ?>