Question

How can I make two numeric arrays
(one for keys one for values – the opposite of array combine)

Source info:

John => Physics,

Mary => Medicine,

Gary => Drama,

Output to

0=>Physics, 

1=>Medicine, 

2=>Drama

and

0=>John,

1=>Mary,

2=>Drama

It seems easy, but I’ve had no luck.

Answer 1

Call array_keys() and array_values() on your associative array respectively.

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If for whatever reason you must have numeric indices that start at 1 (as in your original question before any edits), you’ll need to do a little more:

$keys = array_keys($array);
array_unshift($keys, NULL);
unset($keys[0]);

$values = array_values($array);
array_unshift($values, NULL);
unset($values[0]);