cadena = "gankutsuo"
print cadena[0:4]
 

<?php
 
$dias=31;
$pisos=10;
 
echo "<table width='300' border='1' cellspacing='0' cellpadding='0'>";
 
echo "<tr><td>&nbsp;</td>";
for($dia=1;$dia<=$dias;$dia++){
    echo "<td>Dia ".$dia."</td>";
}
echo "</tr>";
 
for($piso=1;$piso<=$pisos;$piso++){
    echo "<tr>";
    echo "<td>Piso ".$piso."</td>";
    echo "<td>&nbsp;</td>";
    echo "<td>&nbsp;</td>";
    echo "<td>&nbsp;</td>";
    echo "<td>&nbsp;</td>";
    echo "</tr>";
}
 
echo "</table>";
 
?>