解决ajax请求参数过多导致参数被截断的问题

最近发现了个问题：ajax post请求查询参数数量动态变化有200-250000个，当参数超过一定数量N时，post传到后台接的参数就只有N个，多出的参数都没附到请求中，这也是奇怪的事情，浏览器对参数的个数有限制。

js

  const payload = { date: "2024-05-10", sn: [] };
  for (let i = 1; i < 10000; i++) {
    payload["sn"].push("aaaaaaaaaaaaaaaaaaaaaa");
  }

  $.ajax({
    type: "post",
    url: "../test/request.php",
    data: payload,
    beforeSend: function () {},
    success: function (res) {
      console.log(res);
    },
    error: function (xhr1) {},
  });

php

<?php

ini_set('max_input_vars', 200000); //未生效

$data = $_REQUEST;
echo json_encode(['date' => $data['date'], 'num' => count($data['sn'])]);

结果如下，使用ini_set临时修改max_input_vars，并未生效，大概只能去php.ini中修改了

最终解决方案：将数组参数变成字符串参数，减少传递的参数个数

js

const payload = { date: "2024-05-10", sn: "" };
const sn = [];
for (let i = 1; i <= 20000; i++) {
    sn.push("aaaaaaaaaaaaaaaaaaaaaa");
}
payload["sn"] = JSON.stringify(sn);

$.ajax({
    type: "post",
    url: "../test/request.php",
    data: payload,
    beforeSend: function () {},
    success: function (res) {
        console.log(res);
    },
    error: function (xhr1) {},
});

 php

<?php

$data = $_REQUEST;
echo json_encode(['date' => $data['date'], 'num' => count(json_decode($data['sn'], true))]);