I have some multiple select boxes in a form
 <SELECT name="state[]" multiple size=5 style="width:360;">
          <option value="all">all Regions </option>
          <option value="16">Region19 </option>
          <option value="14">Region14</option>
          <option value="5">Region15</option>

these then get passed and I want to use them in mysql query

blah blah
      (t_state_id_state = $state[0])

Whats the best way of finding out how many items are in my array ?
And how can I step through the ones the exist ?
And can I only use LIKE % when my value is all ?


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