same php file, different day...worked 3-4 times in the past in the past

[Fred Silsbee <fredsilsbee@xxxxxxxxx>]

Fatal error:  Call to undefined function mysqli__connect() in /var/www/html/log_book_MySQLnew_i.php on line 116

phpinfo.php shows mysqli

Additional .ini files parsed 

/etc/php.d/curl.ini,
/etc/php.d/fileinfo.ini,
/etc/php.d/json.ini,
/etc/php.d/mysql.ini,
/etc/php.d/mysqli.ini,
/etc/php.d/pdo.ini,
/etc/php.d/pdo_mysql.ini,
/etc/php.d/pdo_sqlite.ini,
/etc/php.d/phar.ini,
/etc/php.d/sqlite3.ini,
/etc/php.d/zip.ini
 

maybe a mysqli.ini is required containing mysqli.so

but 

[root@localhost php.d]# locate mysqli.so
[root@localhost php.d]#                                                                                                           
[root@localhost php.d]# locate mysqli
/usr/bin/mysqlimport
/usr/share/man/man1/mysqlimport.1.gz
[root@localhost php.d]#