mysql_stat

(PHP 4 >= 4.3.0, PHP 5)

mysql_stat — 获取当前系统状态

警告

本扩展自 PHP 5.5.0 起已废弃，并在自 PHP 7.0.0 开始被移除。应使用 MySQLi 或 PDO_MySQL 扩展来替换之。参见 MySQL：选择 API 指南来获取更多信息。用以替代本函数的有：

mysqli_stat()
PDO::getAttribute()，attribute 为 PDO::ATTR_SERVER_INFO

说明

mysql_stat(resource $link_identifier = NULL): string

mysql_stat() 返回当前服务器状态。

参数

link_identifier: MySQL 连接。如不指定连接标识，则使用由 mysql_connect() 最近打开的连接。如果没有找到该连接，会尝试不带参数调用 mysql_connect() 来创建。如没有找到连接或无法建立连接，则会生成 E_WARNING 级别的错误。

返回值

返回字符串，其中包含正常运行时间、线程、查询、打开表、冲刷表和每秒查询的状态。要获得其他状态变量的完整列表，必须使用 SHOW STATUS SQL 命令。如果 link_identifier 无效，则返回 null。

示例

示例 #1 mysql_stat() 示例

<?php
$link   = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$status = explode('  ', mysql_stat($link));
print_r($status);
?>

以上示例的输出类似于：

Array
(
    [0] => Uptime: 5380
    [1] => Threads: 2
    [2] => Questions: 1321299
    [3] => Slow queries: 0
    [4] => Opens: 26
    [5] => Flush tables: 1
    [6] => Open tables: 17
    [7] => Queries per second avg: 245.595
)

示例 #2 替代 mysql_stat() 示例

<?php
$link   = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$result = mysql_query('SHOW STATUS', $link);
while ($row = mysql_fetch_assoc($result)) {
    echo $row['Variable_name'] . ' = ' . $row['Value'] . "\n";
}
?>

以上示例的输出类似于：

back_log = 50
basedir = /usr/local/
bdb_cache_size = 8388600
bdb_log_buffer_size = 32768
bdb_home = /var/db/mysql/
bdb_max_lock = 10000
bdb_logdir =
bdb_shared_data = OFF
bdb_tmpdir = /var/tmp/
...

参见

mysql_get_server_info() - 取得 MySQL 服务器信息
mysql_list_processes() - 列出 MySQL 进程

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用户贡献的备注 3 notes

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Enzo_01 at abv dot bg ¶

16 years ago

<?php
// function that return stat elements into array
function mysql_stat_array($A=null) {
    $status = explode('  ', mysql_stat());
    foreach($status as $k=>$v) { $v=explode(':',$v,2); $status[$v[0]]=$v[1]; }
    return (isset($status[$A])?$status[$A]:$status);
}
/*
example return:
Array ( [0] => Uptime: 385815 [1] => Threads: 1 [2] => Questions: 3515 [3] => Slow queries: 0 [4] => Opens: 32 [5] => Flush tables: 1 [6] => Open tables: 8 [7] => Queries per second avg: 0.009 [Uptime] => Array ( [0] => Uptime [1] => 385815 ) [Threads] => Array ( [0] => Threads [1] => 1 ) [Questions] => Array ( [0] => Questions [1] => 3515 ) [Slow queries] => Array ( [0] => Slow queries [1] => 0 ) [Opens] => Array ( [0] => Opens [1] => 32 ) [Flush tables] => Array ( [0] => Flush tables [1] => 1 ) [Open tables] => Array ( [0] => Open tables [1] => 8 ) [Queries per second avg] => Array ( [0] => Queries per second avg [1] => 0.009 ) )
*/

?>

down

billbilljr at gmail dot com ¶

13 years ago

The following script can be used to clearly print out the results of mysql_stat().

<?php
    mysql_connect("localhost", "username", "password");
    $array = explode("  ", mysql_stat());
    foreach ($array as $value){
        echo $value . "<br />";
    }
?>

Outputs something similar to:

Uptime: 698
Threads: 1
Questions: 4
Slow queries: 0
Opens: 19
Flush tables: 1
Open tables: 12
Queries per second avg: 0.5

down

-1

Anonymous ¶

19 years ago

if you need the complete status as outputted by the "show status" command. Try this function.
<?
function mysql_status($db=NULL) {
if(!mysql_ping($db))
$db=mysql_connect("localhost","user","password");
$res=mysql_query("show status",$db);
while (list($key,$value)=mysql_fetch_array($res))
$sql[$key]=$value;
return $sql;
}
?>