Doesn't Work!

[Dysan]

Why doesn't the following code work?, I keep getting greeted with the following error message:

 

Warning: array_key_exists() [function.array-key-exists]: The second argument should be either an array or an object in C:\Documents and Settings\User\Desktop\Xampp\htdocs\1.php on line 7.

 

<?php

session_start();

if (array_key_exists($_GET['id'], $array))
{
  echo "Already Exists!";
}
else
{
  $_SESSION['ids'][] = $_GET['id'];
  $array = $_SESSION['ids'];
}

print_r($array);

?> 

[revraz]

What is in $array?

[PHP_PhREEEk]

Of course it doesn't work.

 

RTM... dump your variables

 

http://us3.php.net/manual/en/function.array-key-exists.php

 

PhREEEk

[Dysan]

What is in $array?

ID's. I want the ID retrieve from another page, to only be added to the array if it doesn't already exist in the array. If it does, a message should be displayed notifying the user that it already exists.

 

How do I do this?

[premiso]

What he is trying to say, no where in that code is $array defined before the if statement it is used in. Which is why there is an error. If there is more code you are omitting, please post it. Otherwise where are you getting the values of $array from?

[trq]

<?php

session_start();

if (is_array($array) && array_key_exists($_GET['id'], $array))
{
  echo "Already Exists!";
}
else
{
  $_SESSION['ids'][] = $_GET['id'];
  $array = $_SESSION['ids'];
}

print_r($array);

?>