PHP未在选择框和文本区域的表中显示MySQL中的值

Information.php

<?php

if (empty($_POST)===false){
    $required_fields = array('first_name','last_name','gender','age','location','about_me');
    foreach($_POST as $key =>$value){
        if(empty($value) && in_array($key, $required_fields) === true){
            $errors = 'fillin';
            break 1;
        }
    }
}
if (empty($_POST)=== false && empty($errors) === true){

    $update_data = array(
        'first_name' => $_POST['first_name'],
        'last_name' => $_POST['last_name'],
        'gender' => $_POST['gender'],
        'age' => $_POST['age'],
        'location' => $_POST['location'],
        'about_me' => $_POST['about_me']
    );
    update_user($update_data);
    echo 'updated';
}else if (empty($errors) === false){
    echo $errors;
}
?>
        <form action = "" method = "POST">
        First Name: <input type = "text" name = "first_name" maxlength = "40" placeholder = "First Name" value = "<?php echo $user_data['first_name']; ?>"><br>
        Last Name: <input type = "text" name = "last_name" maxlength = "40" placeholder = "Last Name" value = "<?php echo $user_data['last_name']; ?>"><br>
        Gender: <select type = "text" name = "gender" value = "<?php echo $user_data['gender']; ?>"><option>Select</option><option name = "male" value = "Male">Male</option><option name = "female" value = "Female">Female</option><option name = "othergen" value = "Other">Other</option></select><br>
        Age: <input type = "text" name = "age" maxlength = "3" placeholder = "What's your age?" value = "<?php echo $user_data['age']; ?>"><br>
       Location: <input type = "text" name = "location" maxlength = "100" placeholder = "Your location?" value = "<?php echo $user_data['location']; ?>"><br>
        About Me: <textarea type = "text" name = "about_me" maxlength = "500" placeholder = "Say something about yourself!" value = "<?php echo $user_data['about_me']; ?>"></textarea><br>

        <input type = "submit" value = "submit">
        </form>

根据W3C的定义，没有

值

属性。相反，值由

标记包装

<TEXTAREA name="thetext" rows="20" cols="80">
    First line of initial text.
    Second line of initial text.
</TEXTAREA>

---

请不要使用

mysql.*

函数来编写新代码。它们不再得到维护，社区已经开始。看到了吗？相反，你应该学习并使用或。如果你不能决定哪一个，我会帮你的。如果您选择PDO。另请参见性别：在您提供的代码中，您实际上并没有在任何地方调用函数update_user（），因此我对该表没有被调用并不感到惊讶updated@Pankrates是的，我已经意识到了。我换了话题，但我还有一个问题！html代码可能不会导致错误，请提供设置$user\u数据变量并打印其内容的php代码。谢谢，选择框怎么样。我得到了文本区！非常感谢你的回答！

<TEXTAREA name="thetext" rows="20" cols="80">
    First line of initial text.
    Second line of initial text.
</TEXTAREA>

<select name="fieldname">
    <option value="on select,submitted value" <?php echo $myValue == 'on select,submitted value' ? ' selected="selected"' : ''; ?>>displayed value</option>
    <option value="on select,submitted value 2" <?php echo $myValue == 'on select,submitted value 2' ? ' selected="selected"' : ''; ?>>displayed value</option>
</select>