micropub.php

<?php

// Convert form-encoded request to JSON equivalent
if(isset($_POST['h'])) {
  $h = $_POST['h'];
  unset($_POST['h']);
  $input = [
    'type' => ['h-'.$h],
    'properties' => array_map(function($a){ return is_array($a) ? $a : [$a]; }, $_POST)
  ];
} else {
  $input = json_decode(file_get_contents('php://input'), true);
}