我有一个自定义文件，名为：

/wp-content/plugins/listrak-newsletter-api/listrak-newsletter-api.php

当我尝试在WordPress中调用它时，我会被重定向到404页。但该文件在该位置百分之百存在。所以我很困惑。这也是在PHP 7.4上实现的。

前端的HTML表单与php联系。php只是通过soap与第三方通信。

这是HTML：

<div class="block-title"><span>EMAIL NEWSLETTER</span></div>
<div class="tnp tnp-widget">
  <form action="/wp-content/plugins/listrak-newsletter-api/listrak-newsletter-api.php" method="post">
      <p>Sign up for our free email newsletter</p>
      <div class="tnp-field tnp-field-email"><label>Email</label>
      <input class="email" name="listrak-email" required="" type="email"></div>     
      <div class="tnp-field tnp-field-button"><input class="tnp-submit" value="Subscribe now!" type="submit"></div>
      <input name="action" id="action" value="subscribe" type="hidden" />
      <input name="redirect" id="redirect" value="/email-subscribe-success" type="hidden"/>
  </form>
</div>

这是PHP：

<?php

$host = $_SERVER[\'HTTP_HOST\'];

if (isset($_POST[\'action\'])) {
    
    $email = $_POST[\'listrak-email\']; //obtain email from post, place into $email variable
    $email = filter_var($email, FILTER_SANITIZE_EMAIL); //sanitizing email
        
    if ($host == "www.test1.com" || $host == "test1.com") { //if host is, login and use listid
        $sh_param   = array( //setting username & password array
            \'UserName\' => "",
            \'Password\' => ""

        );
        $authvalues = new SoapVar($sh_param, SOAP_ENC_OBJECT); //encoding username and password array
        $headers[]  = new SoapHeader("http://webservices.listrak.com/v31/", \'WSUser\', $sh_param);
        $soapClient = new SoapClient("https://webservices.listrak.com/v31/IntegrationService.asmx?WSDL", array(
            \'trace\' => 1,
            \'exceptions\' => true,
            \'cache_wsdl\' => WSDL_CACHE_NONE,
            \'soap_version\' => SOAP_1_2
        ));
        
        $soapClient->__setSoapHeaders($headers);
        $params = array( //parameters for soap xml integration with listrak
            \'WSContact\' => array(
                \'EmailAddress\' => $email,
                \'ListID\' => \'\'
            ),
            \'ProfileUpdateType\' => \'Overwrite\',
            \'OverrideUnsubscribe\' => true
        );
        
        try {
            
            $rest = $soapClient->SetContact($params); //using SetContact method, send parameters
            
        }
        catch (SoapFault $e) { //if an error occurs, display it
            
            echo \'<pre>\';
            
            print($e->getMessage());
            
            echo \'</pre>\';
        }
    }
}
$redirect = $_POST[\'redirect\'];
header(\'Location: \' . $redirect); 
?>