XXX-prog

$keys = array_keys($arr);

$head = "<tr><th>year</th>".implode("", array_map(function($n) {
  return "<th>$n</th>";
}, $keys))."</tr>";

$rows = implode("", array_map(function($key) use($arr) {
  return "<tr><td>$key</td>".implode("", array_map(function($n) use($key) {
    return "<td>$n[$key]</td>";
  }, $arr))."</tr>";
}, array_keys($arr[$keys[0]])));

echo "<table>$head$rows</table>";

<?php

class AAA {

  private $a = '777';

  function __toString() {

    return \sprintf("%s\n", $this->a);
  }
}


$a = new AAA;

echo $a;

$b = new ReflectionClass(AAA::class);

$property = $b->getProperty('a');
$property->setAccessible(true);
$property->setValue($a, 999);

echo $a;

as@avs:~$ php7.1 /tmp/testReflection.php 
777
999

array_multisort(array_column($arr, 'name'), SORT_NATURAL, $arr);

$arr = array_column($arr, null, 'name');
ksort($arr, SORT_NATURAL);