php - How to disable going back after log in? -


i trying make simple log in page problem user can go index page log in page, tried using exit; didn't work.

 header("location: index.php",true,302);   exit;

i tried using code didn't work:

<meta http-equiv="cache-control" content="no-cache">

if set coockie or session value after loged in, need check first in login file if cookie or session value set redirect index page.


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i running tcpdump on server capture traffic between server (servera) , remote server (serverb). not know how read output tcpdump. point out if serverb acknowledging packets being sent servera being received serverb? here tcpdump log: 2015-03-31 11:32:18.038284 ip (tos 0x0, ttl 64, id 30781, offset 0, flags [df], proto tcp (6), length 60) servera.14033 > serverb.8004: flags [s], cksum 0x02bd (correct), seq 337482636, win 14600, options [mss 1460,nop,nop,ts val 506588081 ecr 0,nop,wscale 7], length 0 0x0000: 4500 003c 783d 4000 4006 bae4 0a04 7a0e e.. servera.14033: flags [s.], cksum 0x3b2a (correct), seq 1742982091, ack 337482637, win 4140, options [mss 1380,nop,wscale 0], length 0 0x0000: 4500 0030 5ff2 0000 f606 5d3b cefd b48a e..0_.....];.... 0x0010: 0a04 7a0e 1f44 36d1 67e3 cbcb 141d 938d ..z..d6.g....... 0x0020: 7012 102c 3b2a 0000 0204 0564 0103 0300 p..,;*.....d.... 2015-03-31 11:32:18.078622 ip (tos 0x0, ttl 64, id 30782, offset 0, flags [
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