mysql_stat()

(PHP 4 >= 4.3.0, PHP 5)

取得当前系统状态

说明

mysql_stat([resource $link_identifier]): string

mysql_stat()返回当前服务器状态。

Note:

mysql_stat()目前只返回 uptime，threads，queries，open tables，flush tables 和 queries per second。要得到其它状态变量的完整列表，只能使用 SQL 命令 SHOW STATUS。

Example #1 mysql_stat()例子

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

以上例子将产生如下输出：

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
)

<?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 ) )
*/
?>

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

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;
}
?>