根据核心php中的链接从下拉列表中预先选择一个值

Question

need help.

when i click the link on page 1 the value should be pre selected in a drop down on page 2. how should i do it in core php? the drop down is listed from a database

Page1.

    <td>
    <a href="assign_student.php" class="link">Assign Student</a>
    </td>

Page2

    <div class="form-group">
    <label for="classes">Select Class </label>
    <select name="classes" class="form-control">
    <?php foreach ($resultClass as $row): ?>
    <option value="<?php echo $row['id']?>"><?php echo $row["class_name"]?>
    </option>
    <?php endforeach ?>

Answer 1

You can do

<?php foreach ($resultClass as $row): 
   if($row['id'] == 'Your desired id'){
?>
    <option value="<?php echo $row['id']?>" selected><?php echo $row["class_name"]?>
    </option>
<?php } else{

    <option value="<?php echo $row['id']?>"><?php echo $row["class_name"]?>
    </option>
    <?php }endforeach ?>

Answer 2

Pass value in query string in link for example

<a href="assign_student.php?class=2" class="link">Assign Student</a>

then you will get that variable on Page 2 by

$_GET['class']

compare it in select > options like

<option value="<?php echo $row['id']?>" <?php if($row['id'] == $_GET['class']) { echo "selected='selected'"; } ?> ><?php echo $row["class_name"]?>

Best luck! :)