I've encountered inexplicable problem and my website can not be accessed normally,how this problem happened? My website work smoothly previously,I've restarted my host after this problem,and my website can be accessed normally.
contents of httpd error_log file as the following:
[Sun Aug 20 09:20:03 2017] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips configured -- resuming normal operations
PHP Fatal error: Call to undefined function is_resource() in /var/www/html/i2active/application/third_party/log4php/appenders/LoggerAppenderFile.php on line 164
PHP Fatal error: Call to undefined function is_resource() in /var/www/html/i2active/application/third_party/log4php/appenders/LoggerAppenderFile.php on line 164
PHP Warning: (Registered shutdown functions) Unable to call _shutdown_handler() - function does not exist in Unknown on line 0
PHP Warning: (Registered shutdown functions) Unable to call _shutdown_handler() - function does not exist in Unknown on line 0
PHP Warning: (Registered shutdown functions) Unable to call session_write_close() - function does not exist in Unknown on line 0
PHP Warning: (Registered shutdown functions) Unable to call session_write_close() - function does not exist in Unknown on line 0