Answer Posted / soujj

$countr = 0;
for($i=1;$i<=9;$i++)
{
$countr++;
$str[] = $i;
if($countr % 3 == 0)
{
echo "[";
for($j=0;$j<=2;$j++)
{
echo $str[$j];
}
echo "]";
$str=array();
}
}

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