jQuery复选框将ajax POST输出变量设置为php

<script src="https://cdn.jsdelivr.net/npm/jquery/dist/jquery.min.js"></script>

<input type="checkbox" id="myCheckbox">

$(document).ready(function() {
  $('#myCheckbox').change(function() {
    if ($(this).is(':checked')) {
      // 复选框被选中时执行的操作
      var myVariable = 'Hello, World!';
      $.ajax({
        url: 'your_php_file.php',
        type: 'POST',
        data: { variable: myVariable },
        success: function(response) {
          console.log(response);
        }
      });
    } else {
      // 复选框未被选中时执行的操作
    }
  });
});

<?php
if(isset($_POST['variable'])) {
  $myVariable = $_POST['variable'];
  // 对变量进行处理或执行其他操作
  echo 'Received variable: ' . $myVariable;
}
?>