My developer team at General Motors has no PHP experience but we have to help with a Drupal/PHP site that went down. I took the 10 lines from the error logs that look important. Could anyone help us understand what's happening from these 10 lines? Any help is appreciated.
PHP Warning: Module 'hash' already loaded in Unknown on line 0
[Sun Jul 23 11:30:04 2017] [notice] Apache/2.2.12 (Linux/SUSE) mod_ssl/2.2.12 OpenSSL/0.9.8j-fips configured -- resuming normal operations
[Sun Jul 23 11:30:05 2017] [notice] Graceful restart requested, doing restart
PHP Warning: Module 'hash' already loaded in Unknown on line 0
[Sun Jul 23 11:30:05 2017] [notice] Apache/2.2.12 (Linux/SUSE) mod_ssl/2.2.12 OpenSSL/0.9.8j-fips configured -- resuming normal operations
[Sun Jul 23 11:30:39 2017] [error] [client 198.208.85.51] ALERT - possible memory corruption detected - unknown Hashtable destructor (attacker '198.208.85.51', file '/www/theblog/index.php', line 19), referer: https://theblog.com/
[Sun Jul 23 22:18:58 2017] [error] Hostname theblock.com. provided via SNI and hostname theblock.com provided via HTTP are different
[Sun Jul 23 22:18:58 2017] [error] Hostname theblock.com. provided via SNI and hostname theblock.com provided via HTTP are different
[Sun Jul 23 22:59:46 2017] [error] [client 198.208.85.51] PHP Fatal error: Call to a member function getElementsByTagName() on a non-object in /www/theblock/modules/filter/filter.module on line 1123
[Sun Jul 23 23:07:21 2017] [error] [client 198.208.85.51] PHP Fatal error: Call to a member function getElementsByTagName() on a non-object in /www/theblock/modules/filter/filter.module on line 1123