PHP:在提交表单时发布tweet

我有一个模板，其中包含一个供用户填写的表单。在用户使用他/她的Twitter帐户成功登录后，用户被重定向到包含表单的模板。现在，我正在尝试实现一个功能，其中在用户提交表单后，tweet将发布在用户的Twitter时间轴上。

我使用Abraham的twitteroauth来实现Twitter OAuth，并且还代表用户发布tweet。

我还使用save_post钩子来触发一个函数，该函数将在表单提交后立即在用户的Twitter帐户上发布tweet。

<pre>
<?php
/*
 *Template Name: Callback 
*/
?>  
<?php
    session_start();
    require "twitteroauth/autoload.php";
    use Abraham'TwitterOAuth'TwitterOAuth;
    define('CONSUMER_KEY', "XXXXXXXXXXX");
    define('CONSUMER_SECRET', "XXXXXXXXXXX");
    define('OAUTH_CALLBACK', "http://localhost/wordpress/index.php/callback/");
    $request_token = [];
    $request_token['oauth_token'] = $_SESSION['oauth_token'];
    $request_token['oauth_token_secret'] = $_SESSION['oauth_token_secret'];
    if (isset($_REQUEST['oauth_token']) && $request_token['oauth_token'] !== $_REQUEST['oauth_token'])
    {
        echo "Opps! Something went wrong!";
    }
    else
    {
        $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $request_token['oauth_token'], $request_token['oauth_token_secret']);
        $access_token = $connection->oauth("oauth/access_token", array("oauth_verifier" => $_REQUEST['oauth_verifier']));
        //print_r($access_token);
        $_SESSION['access_token'] = $access_token;
        $access_token = $_SESSION['access_token'];
        //print_r($_REQUEST['oauth_verifier']);
        $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $access_token['oauth_token'], $access_token['oauth_token_secret']);

        $handle = $access_token['screen_name'];
        $o_token = $access_token['oauth_token'];
        $o_token_secret = $access_token['oauth_token_secret'];
        $user_id = $access_token['user_id'];
        $o_verifier = $_REQUEST['oauth_verifier'];
        function cron_tweet()
        {
            $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $o_token, $o_token_secret);
            $response = $connection->post("statuses/update", array('status' => 'Versionuyyu 1.0'));
        }
        add_action('save_post', cron_tweet);
    }

?>

<script>
    var count = 0
    function addNewMessage(count)
        {       
                if(count > 5)
                {
                    window.alert("NO MORE THAN 5!");
                }
                else
                {
                    var celeb = document.createElement("input");
                    celeb.type = "text";
                    celeb.name = "tweet" + count;
                    celeb.placeholder = "Tweet" + " " + count;
                    celebrity.appendChild(celeb);
                    var date = document.createElement("input");
                    date.type = "datetime-local";
                    date.name = "date" + count;
                    date.placeholder = "message-date" + " " + count;
                    celebrity.appendChild(date);
                    celebrity.appendChild(document.createElement("br"));
                    celebrity.appendChild(document.createElement("br"));
                }
        }        
    function postResults()
    {
        <?php
           $post_information = array(
        'post_title' => 'New Tweet Schedule',
        'post_content' => 'Mandatory content',
        'post_status' => 'publish',
        'post_type' => 'schedule_tweet',
        );
        $post_id = wp_insert_post( $post_information );
        add_post_meta($post_id, 'twitter_handle', $handle, true);
        add_post_meta($post_id, 'oauth_token', $o_token, true);
        add_post_meta($post_id, 'oauth_token_secret', $o_token_secret, true);
        add_post_meta($post_id, 'user_id', $user_id, true);
        add_post_meta($post_id, 'tweet_1', $_POST['tweet1'], true);
        add_post_meta($post_id, 'tweet_2', $_POST['tweet2'], true);
        add_post_meta($post_id, 'tweet_3', $_POST['tweet3'], true);
        add_post_meta($post_id, 'tweet_4', $_POST['tweet4'], true);
        add_post_meta($post_id, 'tweet_5', $_POST['tweet5'], true);
        add_post_meta($post_id, 'date_1', $_POST['date1'], true);
        add_post_meta($post_id, 'date_2', $_POST['date2'], true);
        add_post_meta($post_id, 'date_3', $_POST['date3'], true);
        add_post_meta($post_id, 'date_4', $_POST['date4'], true);
        add_post_meta($post_id, 'date_5', $_POST['date5'], true);

        ?>
    }
</script>
<form method = "POST">
    <fieldset>
        <a style = "color:red" onclick = "addNewMessage(++count)">Schedule a tweet</a>
        <div id = "celebrity"/>
    </fieldset>
    <br>
    <fieldset>
        <input type="hidden" name="submitted" id="submitted" value="true" />
        <?php wp_nonce_field( 'post_nonce', 'post_nonce_field' ); ?>
        <button type="submit" onclick = "postResults()"><?php _e('Add Campaign', 'framework') ?></button>
    </fieldset>

</form>

如上所示，我定义了以下钩子，以便在用户单击Submit按钮时立即触发cron_tweet函数:

function cron_tweet()
        {
            $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $o_token, $o_token_secret);
            $response = $connection->post("statuses/update", array('status' => 'Versionuyyu 1.0'));
        }
        add_action('save_post', cron_tweet);

cron_tweet函数基本上是尝试在用户的Twitter帐户上发布tweet。

然而，上面的代码似乎没有按预期工作。用户提交表单后，用户的Twitter帐户上没有发布任何tweet。

我的代码有什么问题吗?我错过什么了吗?