php Foreach vs array_reduce

Posted 2021-05-04

<?php

$arr = array(
	array('a', '1'),
	array('b', '2'),
);


// klasicky
$out = array();
foreach ($arr as $v) {
	$out[$v[0]] = $v[1];
}

// funkcionalne
$out2 = array_reduce($arr, function($out2, $v) {
	$out2[$v[0]] = $v[1];
	return $out2;
});

echo ($out === $out2) . "\n";
print_r($out);
print_r($out2);

/* vystup:

1
Array
(
    [a] => 1
    [b] => 2
)
Array
(
    [a] => 1
    [b] => 2
)

*/