PHP下拉菜单

Question

I am doing a select on the database and some time it returns me 10 records and sometimes 1000, depending on the criteria of search. What I want is a drop down that will have break after every 30 records. something like this

<select id="dd" >
  <option value="0">1-30</option>
  <option value="30">31-60</option>
  <option value="60">61-90</option>
  <option value="91">91-120</option>
</select>

How do I do that in PHP dynamically?

Answer 1

Here's my take on it:

echo '<select id="dd">';
$j = 0;
for($i=0;$i<$numResults;$i++)
{
    if($i%30==0)
        echo '<option value="'.$j.'">'.($j+1).'-'.($j+=30).'</option>';     
}
echo '</select>';

for $numResults == 130 output would be:

<select id="dd">
    <option value="0">1-30</option>
    <option value="30">31-60</option>
    <option value="60">61-90</option>
    <option value="90">91-120</option>
    <option value="120">121-150</option>
</select>