📅  最后修改于: 2022-03-11 14:52:58.238000             🧑  作者: Mango
Your datatype is not JSON, it’s a FormData. And for jQuery to send a FormData, it needs…
$.ajax({
type: "POST",
url: 'signin2.php',
data: formData,
processData: false, //add this
contentType: false, //and this
})