Save JavaScript variable to file via php

Question

I am fairly new to programming, and was trying to save a JavaScript variable to an existing file:

<script src="./jquery.js"></script>
<script>
var data = inputs
function saveLists(){
$.ajax({
    type: 'POST',
    url: "save.php",
    data: "data",
    success: function(){
        alert("success!")},
    error: function(){
        alert("Failed!")},
    dataType: "text"
})
}
</script>

I define the inputs variable earlier, and I am using POST method and the following php server side:

<?php
$data = $_POST["data"];
$f = fopen('Inputs.txt', 'a+');
fwrite($f, $data);
fclose($f);
?>

When I call the saveLists() function the success alert comes up, but the data is not written to Inputs.txt. Any ideas on what I am doing wrong?

data: "data" so you are just sending the string "data" and PHP is complaining about an undefined index but you're ignoring it. — Niet the Dark Absol
– Niet the Dark Absol, Commented Feb 24, 2018 at 18:01
data needs to be a query string e.g. data: 'data=something' or an object e.g. data: { data: 'something' }. — Mikey
– Mikey, Commented Feb 24, 2018 at 18:03
If you get the success: then it's most likely the php is not handling it correctly. — fdomn-m
– fdomn-m, Commented Feb 24, 2018 at 18:05

Luicy · Accepted Answer · 2018-02-24 18:06:20Z

1

PHP is trying to read an index which doesn't exist, data is not a valid index & key. Try something like this:

data: {
    "data" : data
}

Also, don't trust all code that the server receives in PHP.

answered Feb 24, 2018 at 18:06

Luicy

331 silver badge15 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Save JavaScript variable to file via php

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related