保存選擇從下拉框中

Question

<form method="post"> 
    <select name="select_employee" id="select_employee"> 
    <?php $allemp=$this->AllEmployees; ?> 
    <option selected value="">Select an employee..</option> 
    <?php foreach($allemp as $row){ echo "<option value=".$row[ 'Id']. ">".$row[ 'Etunimi']. " - ". $row[ 'Sukunimi']. "</option>"; } ?> 
    </select> 
    <input type="hidden" name="send" value="namesent"> 
    <input type="submit" value="submit" id="button"> 
</form> 
<br/> 
<br/> 

選擇當我提交這種形式，我留在同一頁上，但我希望有一個相同的時間內保持選定的選項前面的選項可見。我怎麼能這樣做？ 我想：

document.getElementById('select_employee').value = "<?php echo $_GET['select_employee'];?>"; 

但它沒有工作..

Answer 1

試試這個：

$selected = ($row['Id'] == $_REQUEST['select_employee'])?'selected="selected"':''; 
echo '<option '.$selected.' value="'.$row['Id'].'">'.$row['Etunimi'].' - '. $row['Sukunimi'].'</option>'; 

1. 添加上述echo options線210

2. 在側面選項中增加'.$selected.'。

您的代碼就變成了：複製粘貼下面的代碼，而不是您現在

<form method="post"> 
    <select name="select_employee" id="select_employee"> 
    <?php $allemp=$this->AllEmployees; ?> 
    <option selected value="">Select an employee..</option> 
    <?php foreach($allemp as $row){ 
     $selected = ($row['Id'] == $_REQUEST['select_employee'])?'selected="selected"':''; 
    echo '<option '.$selected.' value="'.$row['Id'].'">'.$row['Etunimi'].' - '. $row['Sukunimi'].'</option>'; 
} ?> 
    </select> 
    <input type="hidden" name="send" value="namesent"> 
    <input type="submit" value="submit" id="button"> 
</form> 
<br/> 
<br/> 

Answer 2

這裏：

foreach($allemp as $row){ 
    echo "<option " . (isset($_POST['select_employee']) && $_POST['select_employee'] == $row['Id'] ? ' selected ' : '') . " value=".$row['Id'].">".$row['Etunimi']." - ".$row['Sukunimi']."</option>"; 
}