WP_INSERT_POST使用Safari创建重复帖子

我有一个用户用来创建自定义帖子的前端表单。它可以与Chrome和FF配合使用，但在Safari中会创建两个帖子。

下面是我使用的代码。我试过其他答案中的一些条件句，但都不起作用。从Safari提交时，如何防止wp\\U insert\\U post创建重复的帖子？

谢谢

if( \'POST\' == $_SERVER[\'REQUEST_METHOD\'] && !empty( $_POST[\'action\'] ) &&  $_POST[\'action\'] == "new_post") {

$tags = $_POST[\'post_tags\'];

$new_post = array(
    \'post_title\'    => $title,
    \'post_content\'  => $description,
    \'post_category\' => array($_POST[\'cat\']),
    \'tags_input\'    => array($tags),
    \'post_status\'   => \'publish\',etc.
    \'post_type\' => \'website\'
);

global $current_user;
get_currentuserinfo();

$user_name = strtolower($current_user->user_login);  //custom caps will default to lowercase anyway
$pid = wp_insert_post($new_post);

update_post_meta($pid, "s2member_ccaps_req", $user_name, true);

wp_redirect( get_permalink($pid) ); 
exit();

表格

                <form id="new_post" name="new_post" method="post" action="">
                    <!-- post name -->
                    <p><label for="title">Title</label><br />
                    <input type="text" id="title" value="" tabindex="1" size="20" name="title" />
                    </p>

                    <!-- post Category -->
                    <p><label for="Category">Category:</label><br />
                    <p><?php wp_dropdown_categories( \'tab_index=3&taxonomy=category\' ); ?></p>


                    <!-- post Content -->
                    <p><label for="description">Content</label><br />
                    <textarea id="description" tabindex="4" name="description" cols="50" rows="6"></textarea>
                    </p>

                    <!-- post tags -->
                    <p><label for="post_tags">Tags:</label>
                    <input type="text" value="" tabindex="5" size="16" name="post_tags" id="post_tags" /></p>
                    <p align="right"><input type="submit" value="Publish" tabindex="6" id="submit" name="submit" /></p>

                    <input type="hidden" name="action" value="new_post" />
                    <?php wp_nonce_field( \'new-post\' ); ?>
                </form>

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