In this very basic example, the form is going to the same page on submit, assigning the state value to a session and showing the current selection in the drop down.

<?php
$_SESSION['STATE'] = $_POST['STATE'];

$temp_st = "type".$_SESSION['STATE'];
$$temp_st = " selected";
?>

<form name="form" method="post" action="">
<select name="STATE" id="STATE"
<option value="AL"<?php echo $typeAL; ?>>Alabama</option>
<option value="AK"<?php echo $typeAK; ?>>Alaska</option>
<option value="AZ"<?php echo $typeAZ; ?>>Arizona</option>
<option value="AR"<?php echo $typeAR; ?>>Arkansas</option>
<option value="CA"<?php echo $typeCA; ?>>California</option>
<option value="CO"<?php echo $typeCO; ?>>Colorado</option>
<option value="CT"<?php echo $typeCT; ?>>Connecticut</option>
<option value="DE"<?php echo $typeDE; ?>>Delaware</option>
<option value="DC"<?php echo $typeDC; ?>>District of Columbia</option>
<option value="FL"<?php echo $typeFL; ?>>Florida</option>
<option value="GA"<?php echo $typeGA; ?>>Georgia</option>
<option value="HI"<?php echo $typeHI; ?>>Hawaii</option>
<option value="ID"<?php echo $typeID; ?>>Idaho</option>
<option value="IL"<?php echo $typeIL; ?>>Illinois</option>
<option value="IN"<?php echo $typeIN; ?>>Indiana</option>
<option value="IA"<?php echo $typeIA; ?>>Iowa</option>
<option value="KS"<?php echo $typeKS; ?>>Kansas</option>
<option value="KY"<?php echo $typeKY; ?>>Kentucky</option>
<option value="LA"<?php echo $typeLA; ?>>Louisiana</option>
<option value="ME"<?php echo $typeME; ?>>Maine</option>
<option value="MD"<?php echo $typeMD; ?>>Maryland</option>
<option value="MA"<?php echo $typeMA; ?>>Massachusetts</option>
<option value="MI"<?php echo $typeMI; ?>>Michigan</option>
<option value="MN"<?php echo $typeMN; ?>>Minnesota</option>
<option value="MS"<?php echo $typeMS; ?>>Mississippi</option>
<option value="MO"<?php echo $typeMO; ?>>Missouri</option>
<option value="MT"<?php echo $typeMT; ?>>Montana</option>
<option value="NE"<?php echo $typeNE; ?>>Nebraska</option>
<option value="NV"<?php echo $typeNV; ?>>Nevada</option>
<option value="NH"<?php echo $typeNH; ?>>New Hampshire</option>
<option value="NJ"<?php echo $typeNJ; ?>>New Jersey</option>
<option value="NM"<?php echo $typeNM; ?>>New Mexico</option>
<option value="NY"<?php echo $typeNY; ?>>New York</option>
<option value="NC"<?php echo $typeNC; ?>>North Carolina</option>
<option value="ND"<?php echo $typeND; ?>>North Dakota</option>
<option value="OH"<?php echo $typeOH; ?>>Ohio</option>
<option value="OK"<?php echo $typeOK; ?>>Oklahoma</option>
<option value="OR"<?php echo $typeOR; ?>>Oregon</option>
<option value="PA"<?php echo $typePA; ?>>Pennsylvania</option>
<option value="RI"<?php echo $typeRI; ?>>Rhode Island</option>
<option value="SC"<?php echo $typeSC; ?>>South Carolina</option>
<option value="SD"<?php echo $typeSD; ?>>South Dakota</option>
<option value="TN"<?php echo $typeTN; ?>>Tennessee</option>
<option value="TX"<?php echo $typeTX; ?>>Texas</option>
<option value="UT"<?php echo $typeUT; ?>>Utah</option>
<option value="VT"<?php echo $typeVT; ?>>Vermont</option>
<option value="VA"<?php echo $typeVA; ?>>Virginia</option>
<option value="WA"<?php echo $typeWA; ?>>Washington</option>
<option value="WV"<?php echo $typeWV; ?>>West Virginia</option>
<option value="WI"<?php echo $typeWI; ?>>Wisconsin</option>
<option value="WY"<?php echo $typeWY; ?>>Wyoming</option>
</select>
<input type="submit" name="Submit" value="Submit"/>
</form>

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