PHP在下拉列表中检索会话值

Question

我正在使用带有下拉列表的会话存储，我需要在下拉列表中检索会话值。我在下面给出了遵循我的代码。请任何人帮助我

 <td align="left" width="50%" valign="top" class="bordeau2">
        <select name="numFormCand" id="numFormCand" class="saisie" tabindex="1" value="<?php echo $_SESSION['numFormCand'];?>"  autofocus >
        <option value="-1" >Choisissez</option>
        <option id="" value="apple"  title="apple">apple</option>
        <option id="numFormCand" value="orange">orange</option>
        </select>

Answer 1

使用selected html 属性：https://www.w3schools.com/tags/att_option_selected.asp

<select name="numFormCand" id="numFormCand" class="saisie" tabindex="1" autofocus >
    <option value="-1">Choisissez</option>
    <option id="" value="apple" title="apple"<?php if ($_SESSION['numFormCand'] == 'apple') { echo ' selected="selected"'; } ?>>apple</option>
    <option id="numFormCand" value="orange"<?php if ($_SESSION['numFormCand'] == 'orange') { echo ' selected="selected"'; } ?>>orange</option>
</select>

Answer 2

    <?php
session_start();

?>
<select id="session_list" class="session_list">
    <?php
if ($_SESSION) {
    foreach ($_SESSION as $session_id => $session_value) {

        echo '<option value="' . $session_id . '">' . $session_value . '</option>';
    }

} else {
    echo '<option></option>';
}
?>
</select>