PHP Manual: Sets the callback function for use during training

bool fann_set_callback ( resource $ann , collable $callback )

Sets the callback function for use during training. It means that it is called from fann_train_on_data or fann_train_on_file.

ann

Neural network resource.

callback

The supplied callback function takes following parameters:

ann - The neural network resource
train - The train data resource or NULL if called from fann_train_on_file
max_epochs - The maximum number of epochs the training should continue
epochs_between_reports - The number of epochs between calling this function
desired_error - The desired fann_get_MSE or fann_get_bit_fail, depending on the stop function chosen by fann_set_train_stop_function
epochs - The current epoch

The callback should return TRUE. If it returns FALSE, the training will terminate.

Returns TRUE on success, or FALSE otherwise.

fann_set_callback