Getting the actual (absolute) execution time of the last query in PHP (excluding network latency etc)

问题

I want to get the actual Mysql query execution times while they run in my project so running PHP microtime() before and after and subtracting won't work.

When we run a query in command line, the result displays the timing information something like this:-

xxx rows affected in YY sec

How to get the same time information using PHP. I searched in PHP's Mysql functions in other SO question Here,and here but did not get anything similar. Is there no such PHP function like mysql_error(), mysql_affected_rows() which return other important information? If not why is it not there? Any reasoning?

Someone says -

I think that best way to get execution time is to use some program execution functions like exec() or system().

Does anybody have a working PHP code which returns the actual execution time?

回答1:

try this:

<?php

$host='localhost';
$username='testing';
$password='testing';
$dbname='test';

$DBC = new mysqli($host,$username,$password,$dbname);

$DBC->query('set profiling=1');
$DBC->query('SELECT * FROM abc');
if ($result = $DBC->query("SHOW profiles", MYSQLI_USE_RESULT)) {


    while ($row = $result->fetch_row()) {
        var_dump($row);
    }
    $result->close();
}
if ($result = $DBC->query("show profile for query 1", MYSQLI_USE_RESULT)) {


    while ($row = $result->fetch_row()) {
        var_dump($row);
    }
    $result->close();
}
$DBC->query('set profiling=0');

?>

the first if statement gives you the overall execution time for your query like this:

array(3) { [0]=>  string(1) "1" [1]=>  string(10) "0.00024300" [2]=>  string(17) "SELECT * FROM abc" }

the second if statement gives you the detaild execution times of your query. The results should be exact since you are using the mysql internal profiler.

来源：https://stackoverflow.com/questions/4031934/getting-the-actual-absolute-execution-time-of-the-last-query-in-php-excluding

标签

php

mysql

function

execution-time