自定义登录页--wp_SignOn标头已发送？

正如标题所示，我正在为我的网站用户构建一个定制的前端登录页面。我正在使用wp\\u signon在验证用户的凭据后登录，但出现以下错误：

Warning: Cannot modify header information - headers already sent by (output started at C:\\xampp\\htdocs\\wordpress\\wp-content\\themes\\twentyeleven\\header.php:13) in C:\\xampp\\htdocs\\wordpress\\wp-includes\\pluggable.php on line 737

twentyeleven\\标题。php:13显示了这一点（包括上面和下面的行）：

<!--[if IE 6]>
<html id="ie6" <?php language_attribute(); ?>>
<![endif]-->

我读过一两篇文章说，wp\\u登录必须在创建任何页面内容之前发生，因为它会改变标题，但我想我不太确定当时该如何使用它。wp\\U signon应该去哪里？以下是我的代码结构：

//Retrieve submitted $_POST values.
//Check if this is the first time the form has been displayed (there is a hidden input at the end of the form that changes a boolean to false for all future submits)
//If it\'s not the first time, do form validation and create an array with error ID\'s to be displayed in the form. One of these possible errors is wrong username/password combo:
if (!get_userdatabylogin( $submitted[\'email\'] ))
     $errors[\'emailIsValid\'] = false;
else
{
     $user_data = get_userdatabylogin( $submitted[\'email\'] );
     $password_hashed = $user_data->user_pass;
     if (wp_check_password($submitted[\'password\'], $password_hashed, $user_data->ID))
     {
          $credentials = array();
          $credentials[\'user_login\'] = $submitted[\'email\'];
          $credentials[\'user_password\'] = $submitted[\'password\'];
          if (empty($submitted[\'rememberme\']))
               $credentials[\'remember\'] = false;
          else
               $credentials[\'remember\'] = true;
          wp_signon($credentials, true);
     }
     else
          errors[\'passwordMatchesEmail\'] = false;
}
//Check to see if the errors array has any flags, if so flag a variable to say errors exist
//Form code: form submits to itself
//Check error flags and display error message accordingly
//Display body of form

除此之外，一切都很好wp_signon 线输入正确的凭据会产生我上面提到的错误。

<?php add_action(\'template_redirect\', \'my_check_login\'); function my_check_login(){ if( is_page(\'my-login-page\') && isset($_POST[\'email\']) ){ // check input and // do my login stuff here } }

小码农CODE

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