- array_map: documentation ( source)
- var_dump: documentation ( source)
- array_merge: documentation ( source)
<?php
$input = array(
array(
'Category',
'fruit',
'carbs',
),
array(
'Day 1 - Program',
'Eat banana',
'Eat bread',
),
array(
'Day 1 - record',
'',
'',
),
);
$output = array_map(...array_merge(array(NULL), $input));
var_dump($output);