Don't forget that "mysqlnd.collect_statistics" must be set to "1" in your ini config to use this method.
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
mysqli::get_connection_stats -- mysqli_get_connection_stats — 返回客户端连接的统计数据
mysql仅以过程化样式：由 mysqli_connect() 或 mysqli_init() 返回的 mysqli 对象。
返回数组，包含连接状态。
示例 #1 A mysqli_get_connection_stats() 示例
<?php
$link = mysqli_connect();
print_r(mysqli_get_connection_stats($link));
?>以上示例的输出类似于：
Array
(
[bytes_sent] => 43
[bytes_received] => 80
[packets_sent] => 1
[packets_received] => 2
[protocol_overhead_in] => 8
[protocol_overhead_out] => 4
[bytes_received_ok_packet] => 11
[bytes_received_eof_packet] => 0
[bytes_received_rset_header_packet] => 0
[bytes_received_rset_field_meta_packet] => 0
[bytes_received_rset_row_packet] => 0
[bytes_received_prepare_response_packet] => 0
[bytes_received_change_user_packet] => 0
[packets_sent_command] => 0
[packets_received_ok] => 1
[packets_received_eof] => 0
[packets_received_rset_header] => 0
[packets_received_rset_field_meta] => 0
[packets_received_rset_row] => 0
[packets_received_prepare_response] => 0
[packets_received_change_user] => 0
[result_set_queries] => 0
[non_result_set_queries] => 0
[no_index_used] => 0
[bad_index_used] => 0
[slow_queries] => 0
[buffered_sets] => 0
[unbuffered_sets] => 0
[ps_buffered_sets] => 0
[ps_unbuffered_sets] => 0
[flushed_normal_sets] => 0
[flushed_ps_sets] => 0
[ps_prepared_never_executed] => 0
[ps_prepared_once_executed] => 0
[rows_fetched_from_server_normal] => 0
[rows_fetched_from_server_ps] => 0
[rows_buffered_from_client_normal] => 0
[rows_buffered_from_client_ps] => 0
[rows_fetched_from_client_normal_buffered] => 0
[rows_fetched_from_client_normal_unbuffered] => 0
[rows_fetched_from_client_ps_buffered] => 0
[rows_fetched_from_client_ps_unbuffered] => 0
[rows_fetched_from_client_ps_cursor] => 0
[rows_skipped_normal] => 0
[rows_skipped_ps] => 0
[copy_on_write_saved] => 0
[copy_on_write_performed] => 0
[command_buffer_too_small] => 0
[connect_success] => 1
[connect_failure] => 0
[connection_reused] => 0
[reconnect] => 0
[pconnect_success] => 0
[active_connections] => 1
[active_persistent_connections] => 0
[explicit_close] => 0
[implicit_close] => 0
[disconnect_close] => 0
[in_middle_of_command_close] => 0
[explicit_free_result] => 0
[implicit_free_result] => 0
[explicit_stmt_close] => 0
[implicit_stmt_close] => 0
[mem_emalloc_count] => 0
[mem_emalloc_ammount] => 0
[mem_ecalloc_count] => 0
[mem_ecalloc_ammount] => 0
[mem_erealloc_count] => 0
[mem_erealloc_ammount] => 0
[mem_efree_count] => 0
[mem_malloc_count] => 0
[mem_malloc_ammount] => 0
[mem_calloc_count] => 0
[mem_calloc_ammount] => 0
[mem_realloc_count] => 0
[mem_realloc_ammount] => 0
[mem_free_count] => 0
[proto_text_fetched_null] => 0
[proto_text_fetched_bit] => 0
[proto_text_fetched_tinyint] => 0
[proto_text_fetched_short] => 0
[proto_text_fetched_int24] => 0
[proto_text_fetched_int] => 0
[proto_text_fetched_bigint] => 0
[proto_text_fetched_decimal] => 0
[proto_text_fetched_float] => 0
[proto_text_fetched_double] => 0
[proto_text_fetched_date] => 0
[proto_text_fetched_year] => 0
[proto_text_fetched_time] => 0
[proto_text_fetched_datetime] => 0
[proto_text_fetched_timestamp] => 0
[proto_text_fetched_string] => 0
[proto_text_fetched_blob] => 0
[proto_text_fetched_enum] => 0
[proto_text_fetched_set] => 0
[proto_text_fetched_geometry] => 0
[proto_text_fetched_other] => 0
[proto_binary_fetched_null] => 0
[proto_binary_fetched_bit] => 0
[proto_binary_fetched_tinyint] => 0
[proto_binary_fetched_short] => 0
[proto_binary_fetched_int24] => 0
[proto_binary_fetched_int] => 0
[proto_binary_fetched_bigint] => 0
[proto_binary_fetched_decimal] => 0
[proto_binary_fetched_float] => 0
[proto_binary_fetched_double] => 0
[proto_binary_fetched_date] => 0
[proto_binary_fetched_year] => 0
[proto_binary_fetched_time] => 0
[proto_binary_fetched_datetime] => 0
[proto_binary_fetched_timestamp] => 0
[proto_binary_fetched_string] => 0
[proto_binary_fetched_blob] => 0
[proto_binary_fetched_enum] => 0
[proto_binary_fetched_set] => 0
[proto_binary_fetched_geometry] => 0
[proto_binary_fetched_other] => 0
)
Don't forget that "mysqlnd.collect_statistics" must be set to "1" in your ini config to use this method.It is not correct that the same information can be obtained from the server. For example, the server will not give you information about client side memory usage.While this function is only available if you're using the PHP MySQL Native Driver, you can get the same statistics without this function by using the MySQL SHOW STATUS Query.
Use 'SHOW SESSION STATUS;' for statistics about the current MySQL session.
Use 'SHOW GLOBAL STATUS;' for totals since the server was started.
After you have established a connection with the MySQL Server:
<?php
$result = $mysqli->query('SHOW SESSION STATUS;', MYSQLI_USE_RESULT);
while ($row = $result->fetch_assoc()) {
$array[$row['Variable_name']] = $row['Value'];
}
$result->close();
print_r($array);
?>