一直试图在Wordpress论坛上提问，但没有点击。我希望这里有更多的人可以帮助我。

我的自定义联系人表单页以前可以使用，但由于某些原因，在我提交表单时会导致404错误。我正在使用自定义永久链接（/%类别%/%postname%/），这以前从来都不是问题。

我从WordPress 3.0开始，我已经更新了几次WordPress，我想知道这些更新是否会导致这种情况。如果没有，会是什么？我仍在处理我的主题，但我已经很长时间没有接触我的联系人页面模板了（我将其与其他页面分离）。

if(isset($_POST[\'submitted\'])) {
    if(trim($_POST[\'subject\']) === \'\') {
        $subject = \'No subject\';
    } else {
        $subject = trim($_POST[\'subject\']);
    }
    if(trim($_POST[\'author\']) === \'\') {
        $authorError = \'A valid name is required.\';
        $hasError = true;
    } else {
        $author = trim($_POST[\'author\']);
    }
    if(trim($_POST[\'email\']) === \'\')  {
        $emailError = \'A valid email address is required.\';
        $hasError = true;
    } else if (!preg_match("/^((([a-z]|\\d|[!#$%&\\\'*+\\-\\/=?\\^_`{|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+(\\.([a-z]|\\d|[!#$%&\\\'*+\\-\\/=?\\^_`{|}~]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])+)*)|((\\x22)((((\\x20|\\x09)*(\\x0d\\x0a))?(\\x20|\\x09)+)?(([\\x01-\\x08\\x0b\\x0c\\x0e-\\x1f\\x7f]|\\x21|[\\x23-\\x5b]|[\\x5d-\\x7e]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(\\\\\\\\([\\x01-\\x09\\x0b\\x0c\\x0d-\\x7f]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}]))))*(((\\x20|\\x09)*(\\x0d\\x0a))?(\\x20|\\x09)+)?(\\x22)))@((([a-z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(([a-z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])([a-z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*([a-z]|\\d|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.)+(([a-z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])|(([a-z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])([a-z]|\\d|-|\\.|_|~|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])*([a-z]|[\\x{00A0}-\\x{D7FF}\\x{F900}-\\x{FDCF}\\x{FDF0}-\\x{FFEF}])))\\.?$/iu", trim($_POST[\'email\']))) {
        $emailError = \'A valid email address is required.\';
        $hasError = true;
    } else {
        $email = trim($_POST[\'email\']);
    }
    if(trim($_POST[\'message\']) === \'\') {
        $messageError = \'A message is required.\';
        $hasError = true;
    } else {
        if(function_exists(\'stripslashes\')) {
            $message = stripslashes(trim($_POST[\'message\']));
        } else {
            $message = trim($_POST[\'message\']);
        }
    }
    if(!isset($hasError)) {
        $emailTo = get_option(\'admin_email\');
        $subject_send = \'[ from website ] \'.$subject;
        $body = "$message";
        $headers = \'From: \'.$author.\' <\'.$email.\'>\' . "\\r\\n" . \'Reply-To: \' . $email;
        mail($emailTo, $subject_send, $body, $headers);
        $emailSent = true;
    }
    $errorClass = \' class="error"\';
}

<form action="<?php the_permalink(); ?>" id="feedbackform" method="post" novalidate>
    <p>
        <label for="author">Name</label>
        <?php if($authorError != \'\') { ?><label class="error" for="author"><?=$authorError;?></label>
        <?php } ?><input id="author" name="author" type="text" value="<?php if(isset($hasError)) echo $_POST[\'author\'];?>" title="Your name is required"<?php if($authorError != \'\') { echo $errorClass; } ?> />
    </p>
    <p>
        <label for="email">Email</label>
        <?php if($emailError != \'\') { ?><label class="error" for="email"><?=$emailError;?></label>
        <?php } ?><input id="email" name="email" type="email" value="<?php if(isset($hasError)) echo $_POST[\'email\'];?>" title="Your email address is required"<?php if($emailError != \'\') { echo $errorClass; } ?> />
    </p>
    <p>
        <label for="subject">Subject</label>
        <input id="subject" name="subject" type="text" value="<?php if(isset($hasError)) echo $_POST[\'subject\'];?>" title="The subject is optional" />
    </p>
    <p>
        <label for="message">Message</label>
        <?php if($messageError != \'\') { ?><label class="error" for="message"><?=$messageError;?></label>
        <?php } ?><textarea id="message" name="message" title="Your message is required"<?php if($messageError != \'\') { echo $errorClass; } ?>><?php if(isset($hasError)) { if(function_exists(\'stripslashes\')) { echo stripslashes($_POST[\'message\']); } else { echo $_POST[\'message\']; } } ?></textarea>
    </p>
    <p>
        <input id="submit" name="submit" type="submit" value="Send Message" />
        <input type="hidden" name="submitted" id="submitted" value="true" />
    </p><?php if(isset($emailSent) && $emailSent == true) { ?>
    <p>Your message has been sent. I will reply as soon as possile.</p><?php } ?>
</form>