Source code for drop down menu

<form method="post" action="" >
<select name="branch_no[]" multiple="multiple" size="5">
<option > Choose your location(s) </option>
<option value="3100">3100</option>
<option value="3105">3105</option>
<option value="3503"> 3503</option>
<option value="3504"> 3504</option>
</select>
<br>
<input type="submit" name="submit" value="submit">
</form>

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PHP Souce code for processing

<?php

if ( $_POST[submit] == "submit" )
{
$branch_no = $_POST[branch_no];

for ( $ii = 0 ; $ii < count($branch_no) ; $ii++ )
{
$choose_branch = $choose_branch . " " . $branch_no[$ii] ;
}

$result = "You selected : " . $choose_branch ;

}
?>