php - How to fix call to undefined function mysqli_connect() -

i trying deploy php based application online , getting following error:

call undefined function mysqli_connect() in home/spurdes/public_html/testsites/crimebusters/repository/sql_connection.php on line 27. 

here line 27:

$this->connection=  mysqli_connect($this->connectionhost,$this->username,$this->password,$this->dbname); 

here phpinfo

i dont have access php.init

you need mysqli php extension. contact hoster or change hosting service.