mysqli_get_connection_stats()函数返回客户端连接的统计数据
mysqli_get_connection_stats()函数接受连接对象作为参数，以数组的形式检索并返回给定连接的信息/状态。该函数仅适用于mysqlnd。
mysqli_get_connection_stats($con);
| 序号 | 参数及说明 |
|---|---|
| 1 | con(可选) 这是一个表示与MySQL Server的连接的对象。 |
PHP mysqli_get_connection_stats()函数返回一个数组，其中包含给定连接的状态信息。如果失败，则此函数返回布尔值false。
此函数最初是在PHP版本5中引入的，并且可以在所有更高版本中使用。
以下示例演示了mysqli_get_connection_stats()函数的用法（面向过程风格）-
<?php
//建立连接
$con = mysqli_connect("localhost", "root", "password", "mydb");
//连接状态
$stat = mysqli_get_connection_stats($con);
print_r($stat);
//关闭连接
mysqli_close($con);
?>输出结果
Array ( [bytes_sent] => 138 [bytes_received] => 93 [packets_sent] => 2 [packets_received] => 2 [protocol_overhead_in] => 8 [protocol_overhead_out] => 8 [bytes_received_ok_packet] => 0 [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] => 0 [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_affected_normal] => 0 [rows_affected_ps] => 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_amount] => 0 [mem_ecalloc_count] => 0 [mem_ecalloc_amount] => 0 [mem_erealloc_count] => 0 [mem_erealloc_amount] => 0 [mem_efree_count] => 0 [mem_efree_amount] => 0 [mem_malloc_count] => 0 [mem_malloc_amount] => 0 [mem_calloc_count] => 0 [mem_calloc_amount] => 0 [mem_realloc_count] => 0 [mem_realloc_amount] => 0 [mem_free_count] => 0 [mem_free_amount] => 0 [mem_estrndup_count] => 0 [mem_strndup_count] => 0 [mem_estrdup_count] => 0 [mem_strdup_count] => 0 [mem_edupl_count] => 0 [mem_dupl_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_json] => 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 [init_command_executed_count] => 0 [init_command_failed_count] => 0 [com_quit] => 0 [com_init_db] => 0 [com_query] => 0 [com_field_list] => 0 [com_create_db] => 0 [com_drop_db] => 0 [com_refresh] => 0 [com_shutdown] => 0 [com_statistics] => 0 [com_process_info] => 0 [com_connect] => 0 [com_process_kill] => 0 [com_debug] => 0 [com_ping] => 0 [com_time] => 0 [com_delayed_insert] => 0 [com_change_user] => 0 [com_binlog_dump] => 0 [com_table_dump] => 0 [com_connect_out] => 0 [com_register_slave] => 0 [com_stmt_prepare] => 0 [com_stmt_execute] => 0 [com_stmt_send_long_data] => 0 [com_stmt_close] => 0 [com_stmt_reset] => 0 [com_stmt_set_option] => 0 [com_stmt_fetch] => 0 [com_deamon] => 0 [bytes_received_real_data_normal] => 0 [bytes_received_real_data_ps] => 0 )