使用PHP表单方法将嵌入发送到Discord，即使表单为空，也始终发送嵌入

Question

我正在尝试制作一个代码，通过该代码可以将嵌入方法发送到表单服务器的不和谐服务器中。 但是事情是我每次打开链接示例后都发送了一个embed。 mywebsite.com/discord，即使输入为空，它也会再次发送它，它直接发送到我的上一条消息（$ post_news）。 代码可能看起来完全错误，但是我无法尽力使用php做很多事情。 这是代码；

<?php
  if(isset($_POST['password'])){
      $post_pass = $_POST['password'];
          if($post_pass == "9896"){

            $post_title = $_POST['title'];
            $post_news = $_POST['update'];

            $post_date = date("c");

            $rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
            $post_color = '#'.$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)];


            // Replace the URL with your own webhook url
            $url = " r";

            $hookObject = json_encode([
                /*
                 * The username shown in the message
                 */
                "username" => "test",
                /*
                 * Whether or not to read the message in Text-to-speech
                 */
                "tts" => false,
                /*
                 * File contents to send to upload a file
                 */
                // "file" => "",
                /*
                 * An array of Embeds
                 */
                "embeds" => [
                    /*
                     * Our first embed
                     */
                    [

                        "author" => [
                            "name" => "test",
                        ],

                        // Set the title for your embed
                        "title" => "$post_title",

                        // The type of your embed, will ALWAYS be "rich"
                        "type" => "rich",

                        // A description for your embed
                        "description" => "
                        $post_news
                        ",

                      "timestamp" => "$post_date",


                        // The integer color to be used on the left side of the embed
                        "color" => hexdec( "$post_color" ),

                        // Footer object
                        "footer" => [
                            "text" => "TEST",
                        ],

                    ]
                ]

            ], JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );

            $ch = curl_init();

            curl_setopt_array( $ch, [
                CURLOPT_URL => $url,
                CURLOPT_POST => true,
                CURLOPT_POSTFIELDS => $hookObject,
                CURLOPT_HTTPHEADER => [
                    "Content-Type: application/json"
                ]
            ]);

            $response = curl_exec( $ch );
            curl_close( $ch );


            die("send");
          }
          else{

              die("wrong password");


        }
    }
?>
<!DOCTYPE html>
<html>
<body>

<center>
    <br><br><br>
     <form method="POST">
        <label>PASSWORD</label>
        <input name="password" required ><br><br>
        <label>POST TITLE</label>
        <input name="title" required ><br><br>
        <label>POST INFO</label>
        <textarea name="update" required="" style="margin: 0px; width: 537px; height: 179px;"></textarea><br>
        <button>ИЗПРАТИ</button>

    </form>
</center>

</body>
</html>