Ref: http://php.net/manual/en/function.pg-affected-rows.php
 
PostgreSQL Functions
pg_affected_rows
pg_cancel_query
pg_client_encoding
pg_close
pg_connect_poll
pg_connect
pg_connection_busy
pg_connection_reset
pg_connection_status
pg_consume_input
pg_convert
pg_copy_from
pg_copy_to
pg_dbname
pg_delete
pg_end_copy
pg_escape_bytea
pg_escape_identifier
pg_escape_literal
pg_escape_string
pg_execute
pg_fetch_all_columns
pg_fetch_all
pg_fetch_array
pg_fetch_assoc
pg_fetch_object
pg_fetch_result
pg_fetch_row
pg_field_is_null
pg_field_name
pg_field_num
pg_field_prtlen
pg_field_size
pg_field_table
pg_field_type_oid
pg_field_type
pg_flush
pg_free_result
pg_get_notify
pg_get_pid
pg_get_result
pg_host
pg_insert
pg_last_error
pg_last_notice
pg_last_oid
pg_lo_close
pg_lo_create
pg_lo_export
pg_lo_import
pg_lo_open
pg_lo_read_all
pg_lo_read
pg_lo_seek
pg_lo_tell
pg_lo_truncate
pg_lo_unlink
pg_lo_write
pg_meta_data
pg_num_fields
pg_num_rows
pg_options
pg_parameter_status
pg_pconnect
pg_ping
pg_port
pg_prepare
pg_put_line
pg_query_params
pg_query
pg_result_error_field
pg_result_error
pg_result_seek
pg_result_status
pg_select
pg_send_execute
pg_send_prepare
pg_send_query_params
pg_send_query
pg_set_client_encoding
pg_set_error_verbosity
pg_socket
pg_trace
pg_transaction_status
pg_tty
pg_unescape_bytea
pg_untrace
pg_update
pg_version