roblems with upgrade to 5.2.5

[frank47]

Was having some problems with 5.2.2 and so uploaded all the files for 5.2.5. Went to upgrade and it said that I needed at lease php 5.5 (was running 5.4).
Upgraded to 5.6. Now get the following errors from upgrade.php:

Notice: Use of undefined constant MYSQLI_NUM - assumed 'MYSQLI_NUM' in .../vb/db/mysql/assertor.php on line 55 Notice: Use of undefined constant MYSQLI_ASSOC - assumed 'MYSQLI_ASSOC' in .../vb/db/mysql/assertor.php on line 55 Notice: Use of undefined constant MYSQLI_BOTH - assumed 'MYSQLI_BOTH' in .../vb/db/mysql/assertor.php on line 55
Fatal error: Call to undefined function mysqli_init() in /home/bqanda/public_html/core/vb/database/mysqli.php on line 85

admincp gives:

Fatal error: Call to undefined function mysqli_init() in /home/bqanda/public_html/core/vb/database/mysqli.php on line 85

Any suggestions????

[Mark.B]

Is mysqli compiled in php?

[frank47]

Thank you. Not sure why it recompiled without msqli but that was the solution.
Thank you again