Please tell me what drupal table the block php visibilities settings is stored at
The php code should be stored in the pages field of the block table, and it should not be serialized.

The visibility field can have one of three values: 


BLOCK_VISIBILITY_NOTLISTED (0),
BLOCK_VISIBILITY_LISTED (1), or
BLOCK_VISIBILITY_PHP (2).


In the case of the first two, the pages field will contain a text list of the notlisted or listed pages for the block. in the case of the third, the field will contain the php code.