PHP

Interactive PHP console

On Ubuntu there is necessary to install this package:

Working with dates

Compute date shifted against the present:

date('Y-m-d', strtotime(date("Y-m-d")." +1 day"));

Difference of two dates

$datetime1 = new DateTime('2005-05-26 10:06:15');
$datetime2 = new DateTime('2014-11-30');
$interval = $datetime1->diff($datetime2);
echo $interval->format('"It happened %y years plus %m' months ago...");

Calling classes functions with variable names:

class myclass {
static function say_hello()
{
echo "Hello!\n";
}
}

$classname = "myclass";

call_user_func(array($classname, 'say_hello'));
call_user_func($classname .'::say_hello'); // As of 5.2.3

$myobject = new myclass();

call_user_func(array($myobject, 'say_hello'));

?>