Unfortunately the apache server has been stopped and it could not start in your server just follow the below solution,

# /etc/init.d/httpd restart


Stopping httpd:                                            [FAILED]

Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80

(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

no listening sockets available, shutting down

Unable to open logs

                                                           [FAILED]

Check your httpd error_log using tail command,
 
# tail -f /var/log/httpd/error_log


[Sun Sep 14 02:10:12 2014] [notice] Digest: generating secret for digest authentication ...

[Sun Sep 14 02:10:12 2014] [notice] Digest: done

[Sun Sep 14 02:10:12 2014] [notice] mod_python: Creating 4 session mutexes based on 256 max processes and 0 max threads.

[Sun Sep 14 02:10:12 2014] [notice] Apache/2.2.3 (CentOS) configured -- resuming normal operations

To find your apache (httpd) port listening on network by netstat command,
 
# netstat -anp | grep 80


tcp        0      0 192.168.0.1:80            192.168.0.1:48814         SYN_RECV    -                  

tcp        0      0 192.168.0.1:80            192.168.0.25:56469        SYN_RECV    -                  

tcp        0      0 :::80        :::*    LISTEN      29939/whois  

Terminate the process id (PID),
 
# kill -9 29939

# netstat -anp | grep 80

Start your apache server,
 
# /etc/init.d/httpd start
Starting httpd:                                    [  OK  ]
# netstat -anp | grep 80


tcp        0      0 192.168.0.1:80            220.255.2.201:1048          SYN_RECV    -                  

tcp        0      0 :::80                       :::*                        LISTEN      19373/httpd        

tcp        0      0 ::ffff:192.168.0.1:80     ::ffff:192.168.0.100:54053   ESTABLISHED 19380/httpd        

tcp        0      0 ::ffff:192.168.0.1:80     ::ffff:192.168.0.100:40055   ESTABLISHED 19382/httpd