(PHP 4 >= 4.3.0, PHP 5)
mysql_stat — 获取当前系统状态
此扩展在 PHP 5.5.0 中已弃用，并在 PHP 7.0.0 中被移除。应使用 MySQLi 或 PDO_MySQL 扩展。另请参阅 MySQL: 选择 API 指南。此函数的替代方法包括
attribute 为 PDO::ATTR_SERVER_INFO
link_identifierMySQL 连接。如果未指定链接标识符，则假定为 mysql_connect() 最近打开的链接。如果未找到此类链接，它将尝试创建链接，就像 mysql_connect() 被调用且没有参数一样。如果未找到或建立连接，将生成 E_WARNING 级别的错误。
返回一个字符串，其中包含有关正常运行时间、线程、查询、打开的表、刷新表和每秒查询的统计信息。有关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 #1 mysql_stat() 示例
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
$status = explode(' ', mysql_stat($link));
print_r($status);
?>上面的示例将输出类似于以下内容
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";
}
?>上面的示例将输出类似于以下内容
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/ ...
以下脚本可用于清楚地打印出 mysql_stat() 的结果。
<?php
mysql_connect("localhost", "username", "password");
$array = explode(" ", mysql_stat());
foreach ($array as $value){
echo $value . "<br />";
}
?>
输出类似于以下内容
正常运行时间: 698
线程: 1
问题: 4
慢查询: 0
打开: 19
刷新表: 1
打开的表: 12
每秒查询平均值: 0.5<?php
// 返回统计元素到数组的函数
function mysql_stat_array($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);
}
/*
示例返回值:
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 ) )
*/
?>