PHP combine multiple array into one with key - php

Question

I am lost actually, not sure how to explain the question.
Suppose I have three array
$name = array('mark', 'jones', 'alex');
$age = array(12, 23, 34);
$country = array('USA', 'UK', 'Canada');
What I am looking for is:
array(
0 => array(
'name' => 'mark',
'age' => 12,
'country' => 'USA'
)
1 => array(
'name' => 'jones',
'age' => 23,
'country' => 'UK'
)
2 => array(
'name' => 'alex',
'age' => 34,
'country' => 'Canada'
);
Couldn't figure out any built in PHP array function to handle it.

Answer 1

try something like this
$result = array();
foreach($name as $key => $value)
{
$result[$key] = array (
'name' => $value,
'age' => $age[$key],
'country' => $country[$key]
);
}
echo '<pre>';
print_r($result);
?>

Answer 2

You could do it without any manual looping like this:
// array_map with null callback merges corresponding items from each input
$merged = array_map(null, $name, $age, $country);
// walk over the results to change array_map's numeric keys to strings
$keys = ['name', 'age', 'country'];
array_walk(
$merged,
function(&$row) { $row = array_combine(['name', 'age', 'country'], $row); }
);
print_r($merged);
You can even write it in such a way that the keys in the result are equal to the names of the variables $name, $age, $country without needing to repeat yourself:
// Here "name", "age" and "country" appear only once:
$inputs = compact('name', 'age', 'country');
$merged = call_user_func_array('array_map', [null] + $inputs);
$keys = array_keys($inputs);
array_walk(
$merged,
function(&$row) use($keys) { $row = array_combine($keys, $row); }
);
However, to be frank it might be more readable (and it might even be faster) to just for over the inputs (assuming they have the same number of items) and do it manually.