- var_dump: documentation ( source)
- mktime: documentation ( source)
- date: documentation ( source)
- date_format: documentation ( source)
<?php
var_dump( date('n') );
$iniDate = mktime( 0, 0, 0, date('n') -1, 21, date('Y') );
var_dump( $iniDate );
$iniDate = new DateTime('2013/05/01');
$iniDate->setTime('23','59','59');
var_dump( date_format( $iniDate, 'Y-m-d H:i:s' ) );