How can I merge multiple separate arrays that are not included in an array? [duplicate]

Answer 1

The short answer to your question in code is:

$merged = call_user_func_array('array_merge', $unique_answer_title);

This is turning the one array you have into multiple parameters to array_merge() which accepts any number of parameters.

It had been previously (Sep 2010) outlined in:

• A better php array_merge

If you then complain about double values, this has been handled already as well:

• PHP merge array(s) and delete double values

Answer 2

You'll have to loop through each of them and the merge them:

$test = array(
 array(
  "Immediate",
  "Yes"
 ),
 array(
  'Test 2',
  'test 3'
 ),
 array(
  'test4',
  'test5'
 )
);

$new_array = array();
foreach($test as $array) $new_array = array_merge($new_array, $array);

var_dump($new_array);

Really, what you're asking is how to flatten a multi-dimensional array, the following may also be helpful: How to "flatten" a multi-dimensional array into a simple one in PHP?