Php 我在数据库中的click-1上有一个按钮，每当我想点击second+；1.

我在数据库中的click-1上有一个按钮，每次我想点击second+1、third-1等等

代码html和php

<form action="ind.php" method="post">
<input type="submit" name="click" value="click" id="click">
</form>
<?php
if (isset($_POST['click'])){
    $username = "root";
    $password = "";
    $database = new PDO("mysql:host=localhost; dbname=testt;",$username,$password);
    $update = $database->prepare("UPDATE test SET NUMBER=NUMBER-1 WHERE ID = 1");
    $update->execute();
}
if(isset($_POST['click'])){
    $username = "root";
    $password = "";
    $database = new PDO("mysql:host=localhost; dbname=testt;",$username,$password);
    $update = $database->prepare("UPDATE test SET NUMBER=NUMBER+1 WHERE ID = 1");
    $update->execute();}?>

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我认为，代码中需要更多的逻辑

检查当前值，然后根据当前值使用+1或-1

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如果（$click==1）{/-1}否则{/+1}

此代码无效