解決ajax請求引數過多導致引數被截斷的問題

最近發現了個問題：ajax post請求查詢引數數量動態變化有200-250000個，當引數超過一定數量N時，post傳到後臺接的引數就只有N個，多出的引數都沒附到請求中，這也是奇怪的事情，瀏覽器對引數的個數有限制。

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'])]);

結果如下，使用ini_set臨時修改max_input_vars，並未生效，大概只能去php.ini中修改了

最終解決方案：將陣列引數變成字串引數，減少傳遞的引數個數

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))]);