- array_slice: documentation ( source)
- end: documentation ( source)
- implode: documentation ( source)
- range: documentation ( source)
<?php
$days = range(1,31);
$i = 3;
$j = 2;
$str ="";
for($k=0;$k<end($days);){
$str .= "<b>" . implode("</b> <b>", array_slice($days, $k,$i)) ."</b> " . implode(" ", array_slice($days, $k+$i, $j)). " ";
$k=$k+$i+$j;
}
echo $str;