tiny_blade.php

<?php

namespace tiny_blade;

function _replace(string $template): string
{
  // @endif
  $template = preg_replace('/^\s*@(end.+?)\s*$/m', '<?php $1 ?>', $template);
  // @if ($foo)
  $template = preg_replace('/^\s*@(.+?)\s*$/m', '<?php $1: ?>', $template);
  // @checked($foo)
  $template = preg_replace('/\s+@(.+?)\((.+?)\)/', '<?= ($2) ? " $1" : "" ?>', $template);
  // {{ $foo }}
  $template = preg_replace('/{{\s*(.+?)\s*}}/', '<?= htmlspecialchars($1) ?>', $template);
  // {!! $foo !!}
  $template = preg_replace('/{!!\s*(.+?)\s*!!}/', '<?= $1 ?>', $template);
  return $template;
}

function _compile(string $name): string
{
  $source = "templates/$name.blade.php";
  $target = "templates/_cache/$name.php";
  if (!is_file($target) || filemtime($source) != filemtime($target)) {
    $target_dir = dirname($target);
    if (!is_dir($target_dir)) {
      mkdir($target_dir, 0777, true);
    }
    file_put_contents($target, _replace(file_get_contents($source)));
    touch($target, filemtime($source));
  }
  return $target;
}

function render(string $_name, array $_args = []): string
{
  $_target = _compile($_name);
  extract($_args);
  ob_start();
  include $_target;
  return ob_get_clean();
}

function evaluate(string $_template, ...$_args): string
{
  extract($_args);
  ob_start();
  eval('?>' . _replace($_template));
  return ob_get_clean();
}