Array Exists?

Dysan

How do I check if an array already exists?

bpat1434

[man]isset/man will tell you if the variable is already created, and [man]is_array/man will tell you if it's an array. You can then check to see if it's populated with [man]empty/man.

So:

if(isset($array) && is_array($array) && !empty($array))
{
    // Okay, $array is a non-empty array
}

Dysan

Why doesn't the following code work.

I'm trying to test if an array exists, to insert data into it, else create the array. Only each time I access the page, the array contains no data. Why is this?

<?php
session_start();

$id = $_GET['id'];
$array = $_SESSION['ids'];
if (!isset($array))
{
$array = array();
}
else
{

$array[] = 'Data';
$_SESSION['ids'] = $array;
}


echo $_SESSION['ids'];

print_r($array);
?>

bpat1434

It is okay to ask a follow-up question in your previous thread. So I've merged them together. No reason to have 2 threads for essentially one question.

I'm not sure why it won't work.

greensweater

$array is always set because

$array = $_SESSION['ids'];

How about:

session_start();
if (!isset($_SESSION['ids']))
{
  $_SESSION['ids'] = array();
}
$_SESSION['ids'][] = 'Data';

print_r($_SESSION['ids']);