我正在为wordpress小部件构建一个非常小的表单。表单只是一个下拉选择输入,允许用户选择他们的业务类型 - 然后将其存储在数据库的wp_usermeta表中。
下拉列表实际上是在注册时选择的,因此这种形式更有可能让用户更改价值。
这是我用来创建表单的php:
<?php
$user = wp_get_current_user();
$selected = get_user_meta( $user->ID, 'i_am_a', true );
?>
<form method="post">
<h3>I am a...</h3>
<select name="i_am_a" id="i_am_a">
<option value="musician" autocomplete="off" <?php echo ($selected == "musician")? 'selected="selected"' : '' ?>>Musician/Artist</option>
<option value="band" autocomplete="off" <?php echo ($selected == "band")? 'selected="selected"' : '' ?>>Band</option>
<option value="photographer" autocomplete="off" <?php echo ($selected == "photographer")? 'selected="selected"' : '' ?>>Photographer</option>
<option value="business" autocomplete="off" <?php echo ($selected == "business")? 'selected="selected"' : '' ?>>Small Business</option>
<option value="other" autocomplete="off" <?php echo ($selected == "other")? 'selected="selected"' : '' ?>>Other</option>
</select>
<input type="submit" name="submit" value="change" class="button"/>
</form>
<?php
$i_am_a = $_POST['i_am_a'];
update_user_meta( $user->ID, 'i_am_a', $i_am_a );
?>
注意:未定义的索引:第90行的/home/.../layers-whitelabel.php中的i_am_a
第90行如下:
$i_am_a = $_POST['i_am_a'];
如何摆脱这个错误?
答案 0 :(得分:1)
声明你的变量。或者使用isset()检查它们是否在引用它们之前声明,如:
$i_am_a = isset($_POST['i_am_a']) ? $_POST['i_am_a'] : '';
答案 1 :(得分:0)
试试这个,
$i_am_a = isset($_POST['i_am_a']) ? $i_am_a = $_POST['i_am_a'] : 0;
有关使用0进行检查的说明,请参阅this answer。