试图阻止刷新页面重新提交表格

Question

我有以下代码。我试图阻止我的页面在页面刷新后使用标题（“location：location.php”）重新提交表单;不过，我得到以下列出

错误

Warning: Cannot modify header information - headers already sent by (output started at /Users/anderskitson/Sites/fiftyfity/wp-content/themes/fiftyfityNew/contact-form copy.php:7) in /Users/anderskitson/Sites/fiftyfity/wp-content/themes/fiftyfityNew/contact-form copy.php on line 68 

守则错误

<?php 
/* 
Template Name: form-test.php 
*/ 
?> 

<?php include_once(ABSPATH . 'wp-admin/includes/plugin.php'); ?> 
<? include_once(ABSPATH. 'wp-content/themes/fiftyfityNew/contact-form.php'); ?> 


<?php 
/** 
* The template for displaying all pages. 
* 
* This is the template that displays all pages by default. 
* Please note that this is the wordpress construct of pages 
* and that other 'pages' on your wordpress site will use a 
* different template. 
* 
* @package WordPress 
* @subpackage Starkers 
* @since Starkers 3.0 
*/ 

get_header(); ?> 

<script> 
var i=0; 
function test(){ 

for(i=0;i<=5;i++){ 
    document.write("the number is" + i); 
} 
} 
</script> 
<script> 
test(); 
</script> 

<?php function make_user_feedback_form() { 
    global $wpdb; 
    global $current_user; 


     $ufUserID = $current_user->ID; 

     if ('POST' == $_SERVER['REQUEST_METHOD'] && !empty($_POST['action']) && $_POST['action'] == 'updateFeedback') { 
      $ufDataUpdate = $wpdb->insert('wp_user_feedback', array('date' => current_time('mysql'), 'responses' => $_POST["test"])); 
     } 
     }?> 
    <div id="form"> 
    <ol> 
     <form method="post"> 
      <li><label for="test">Pick a date Babe:</label><input type="text" id="datepicker" name="test" value="" /></li> <!-- the (name="test") value is what the ('responses' => $_POST["test"]) value is talking too --> 

      <li><input name="submit" type="submit" id="submit" class="submit button" value="Send feedback" /></li> 
      <?php wp_nonce_field('updateFeedback'); ?> 
      <input name="action" type="hidden" id="action" value="updateFeedback" /> 
     </form> 
    </ol> 
    </div> 
    <?php 


add_action('the_content','make_user_feedback_form'); 


header("location: http://localhost:8888/fiftyfity/?page_id=90"); 


?> 


<?php 
make_user_feedback_form(); 
?> 




<?php get_sidebar(); ?> 
<?php get_footer(); ?> 

Answer 1

的问题是要包括脚本的一个发送头WordPress的得到一个机会之前这样做，或者您的include_once和get_header语句之间的空行会使Web服务器本身发送其默认标题。

因此，修改前几行看起来像（即去除多余的PHP开启/关闭标签）：

<?php 
/* 
Template Name: form-test.php 
*/ 

include_once(ABSPATH . 'wp-admin/includes/plugin.php'); 
include_once(ABSPATH. 'wp-content/themes/fiftyfityNew/contact-form.php'); 

/** 
* The template for displaying all pages. 
* 
* This is the template that displays all pages by default. 
* Please note that this is the wordpress construct of pages 
* and that other 'pages' on your wordpress site will use a 
* different template. 
* 
* @package WordPress 
* @subpackage Starkers 
* @since Starkers 3.0 
*/ 

get_header(); ?> 

还要检查是否有数据输出的包含文件，header()来电或类似的相邻开/结束标签。