Returns the error code of the most-recently executed SQL Anywhere PHP function. Error codes are stored per connection. If
no $conn is specified, then sasql_errorcode returns the last error code where no connection was available. For example, if you are
calling sasql_connect and the connection fails, then call sasql_errorcode with no parameter for the $conn to get the error code. If you want to get the corresponding error message use the sasql_error function.
An integer representing a SQL Anywhere error code. An error code of 0 means success. A positive error code indicates success
with warnings. A negative error code indicates failure. For a list of error codes, see SQL Anywhere error messages sorted by SQLCODE.