How to convert text area data into select list in forms?

Question

I want to create a configurable select list in forms.To achieve this what I did is I have created a text area, in that I will enter values like:

HI|Hi
BYE|Bye

So, in form select options I have to use these values in a dropdown list. How can I achieve that. I am getting this text area data in form like below.Here I am getting data, but not displaying in the options.

$entityoptions = variable_get('entitydropdown'); 

I am getting the values as it is, but am not getting how can I assign these values to #options. I did like below but its not displaying the values.

'#options' => $entityoptions,

Please help me to identify, where I am doing wrong. Thanks in advance.

Answer 1

As requested in the comments, in answer format:

1. Use the explode() function on your string
2. Loop through the results and split each entry
3. Add the result to the options array you feed to the select box

Eg.

$options = array();
$lines = explode(PHP_EOL, $entityoptions);
foreach($lines as $line) {
  $line = explode('|', $line);
  $options[$line[0]] = $line[1];
}