What to do if ajax fails to call php

ajax fails to call php because ajax can only initiate GET requests, but not POST requests, otherwise a 500 error will be reported. The solution is to use the GET method, and its syntax is such as "$.ajax({type: "GET",url: "tmpl.html",datdType: "html",data: {"username": "username","password":...}".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

What should I do if ajax fails to call php?

ajax When requesting php, a 500 error is reported. Ajax can only initiate a GET request, but not a POST request. Otherwise, a 500 error is reported.

I am the title 1

abc
$.ajax({
type: "GET", // GET方式不会报错
url: "tmpl.html",
datdType: "html",
data: {
"username": "username",
"password": "password"
},
success: function(data) {
$("p").append(data);
}
});

(1)The errors reported are all the same: Failed to load resource: the server responded with a status of 500 (Internal Server Error)

(2) I am a front-end engineer. I only work on the front-end and do not write back-end code, that is, I do not have J2EE or PHP.

(3) After testing, if there is back-end code, no errors will be reported in all situations. .

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