How to change date to seconds?

I have format of date YYYY-MM-DD and qould like to change simple as possible to seconds UNIX time. How to do it?

I have tried with

$alteredd= time($idate);

echo $alteredd;

But this is current time...in seconds

Have you tried [man]strtotime/man?

I will do but it is question:

How can I change date on server 2000-09-10 to format 10 September 2000

Now you should use [man]strfrtime/man or [man]date/man.

Actually, you might as well read an overview of the date/time functions.

I get date form db on server:
$idate = $row["idate"];

than I transfer to string with $alterdd1= strftime("%d %B %Y");

and change to seconds: $alteredd2=strtotime("$alterdd1");

Can you suggest me that it will work? Now it shows me current time not from $idate ...Need help

$idate = $row["idate"];
$alteredd2 = strtotime($idate); //obtain timestamp
$alterdd1 = strftime("%d %B %Y", $alteredd2);

I will use code:

 $alterdate = strftime("%d %B %Y", strtotime($idate));

echo $alterdate."\n";


echo strtotime("$alterdate"), "\n";

it works.thanks