- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$maxdays = 1;
for($daynumber=0;$daynumber<$maxdays;$daynumber++){
$currentdayval = "+".(string)($daynumber-$maxdays)." days";
$minutes=0;
for($quarter=0;$quarter<24*4;$quarter++){
$minutes += $quarter*15;
$currentminutesval = $minutes." minutes";
$date_sql = date("Y-m-d H:i:s",strtotime($currentdayval." + ".$currentminutesval)); //current date
echo $date_sql. "\n";
}//for $quarter
}//for $daynr