使用ajax更改远程文件的内容

Question

I'm trying to change content of chatt.php file on server, using ajax procedure.

$("#btnsend").click(function(){
    var a = $("#write").val();
    console.log(a); // that's ok
    $.ajax({
        type: "POST",
        url: "ajax.php",
        data: a,
        dataType: "json",
        success: function () {
            alert("323");
        }
    });
});

ajax.php

$a = $_POST["a"];
$b = "chapters/chatt.php");

file_put_contents($b, $a);

There is no alert, chatt.php is not changed, console is empty.

Any help?

Answer 1

First of all add php error_reporting().

Error Reporting Manual

In php you are getting the Undefined index notice for $_POST['a']. You need to pass a from ajax as:

Modified code:

$("#btnsend").click(function(){ 
var a = $("#write").val(); 
console.log(a); // that's ok 
$.ajax({ 
type: "POST", 
url: "ajax.php", 
data: "a="+a, 
dataType: "json", 
success: function () { 
alert("323"); 
} }); 
});

As my other mate mentioned in comments if you solve this issue you will face an another issue like Parse error for this line:

$b = "chapters/chatt.php"); // unexpected bracket

Side note:

Keep in mind error_reporting() is only for development not for productions.