#184 cubrid_disconnect() and cubrid_close() are same but parameter requirement is different

[Jira Trac]

These two functions are the same but one has optional param while the other requires it.

[cubrid_close()|http://www.php.net/manual/en/function.cubrid-close.php] is defined as:

{code}
bool cubrid_close ([ resource $conn_identifier ] )
{code}

[cubrid_disconnect()|http://www.php.net/manual/en/function.cubrid-disconnect.php] is defined as:

{code}
bool cubrid_disconnect ( resource $conn_identifier )
{code}

Both should be optional.