Query time result in MySQL w/ PHP

问题

Is there a way that I can get the time of a MySQL query (specifically with PHP)? The actual time it took to complete the query, that is.

Something such as: Results 1 - 10 for brown. (0.11 seconds)

I tried to look for an example, to no avail. Here is an example of my code:

                    // prepare sql statement
                $stmt = $dbh->prepare("SELECT ijl, description, source, user_id, timestamp FROM Submissions WHERE MATCH (ijl, description) AGAINST (?)");

                // bind parameters
                $stmt->bindParam(1, $search, PDO::PARAM_STR);

                // execute prepared statement
                $stmt->execute();

For my current full text search using a MyISAM table engine. Any help would be incredible. Thank you.

回答1:

$starttime = microtime(true);

//Do your query and stuff here

$endtime = microtime(true);
$duration = $endtime - $starttime; //calculates total time taken

This will give you the run time in microseconds.

回答2:

this may be help you

http://dev.mysql.com/doc/refman/5.0/en/show-profile.html

mysql> SET profiling = 1;
Query OK, 0 rows affected (0.00 sec)

mysql> DROP TABLE IF EXISTS t1;
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> CREATE TABLE T1 (id INT);
Query OK, 0 rows affected (0.01 sec)

mysql> SHOW PROFILES;
+----------+----------+--------------------------+
| Query_ID | Duration | Query                    |
+----------+----------+--------------------------+
|        0 | 0.000088 | SET PROFILING = 1        |
|        1 | 0.000136 | DROP TABLE IF EXISTS t1  |
|        2 | 0.011947 | CREATE TABLE t1 (id INT) |
+----------+----------+--------------------------+

greetings

回答3:

There are two possibilities I can tell you now:

wrap ->execute() with microtime() and measure it yourself, possibly wrapping whole "querying" code snippet within a class / function
run EXPLAIN query of that query and see if you can read some values from the returned data

Hope that helps.