Notice: Array to string conversion

Question

I am getting an error when posting via ajax to a csv file via php.

<?php
$list = array ($_POST["array"]);
$fp = fopen('array.csv', 'w');
fputcsv($fp, $list);
fclose($fp);
?>

My array i am trying to post

["0", "0", "0", "0", "0", "0", "0", "0", 99]

The response:

Notice: Array to string conversion in C:\xampp\htdocs\snx\assets\www\write.php on line 4

My Ajax post;

/* Array */
var defaultArray = new Array();
var localArray = new Array();
var serverArray = new Array();

/* Default Values */
defaultArray[0] = "0";
defaultArray[1] = "0";
defaultArray[2] = "0";
defaultArray[3] = "0";
defaultArray[4] = "0";
defaultArray[5] = "0";
defaultArray[6] = "0";
defaultArray[7] = "0";
defaultArray.push(99);

/* Write Array [1st Load] */
$.post("write.php", { 'array': defaultArray });

Solution

$list = array ($_POST["array"]);

If $_POST['array'] is already an array, Array($_POST['array']) makes an array of [one] arrays of strings.

If you write print_r($list), you will see something like this:

Array(0 =>
 Array(
   0 => "0",
   1 => "0",
   2 => "0",
   3 => "0",
   4 => "0",
   5 => "0",
   6 => "0",
   7 => "0",
   8 => 99
 )
)

To use the original array of strings, you probably just want:

$list = $_POST["array"];

Now, when you write print_r($list), you'll see the expected:

Array(
   0 => "0",
   1 => "0",
   2 => "0",
   3 => "0",
   4 => "0",
   5 => "0",
   6 => "0",
   7 => "0",
   8 => 99
)

---

BTW, use only .push for adding items to Javascript arrays, which you should instantiate like = [], not = new Array().

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