在PHP中更新记录/表单数据时，如何保持选择的下拉值？

Question

Here is the code that i am using for drop down to select.

<select name="formreg" value="">
    <option value="Registered" <?php if($f_reg == 'Registered') { ?> selected <?php echo $f_reg; } ?> >Registered</option>
    <option value="NonReg" <?php if($f_reg == 'NonReg') { ?> selected <?php echo $f_reg; } ?> >NonReg</option>
</select>

Answer 1

<select name="regform">
    <option value="Registered" <?php if (isset($register) && $register=='Registered') {?> selected='selected' <?php echo $register; }?>>Registered</option>
    <option value="NonReg" <?php if (isset($nonreg) && $nonreg == 'NonReg') {?> selected='selected' <?php echo $nonreg;} ?>>NonReg</option>
</select>