Evaluate Template

sample.xml.tmpl

<?php
$hoge = 123;
?>
<Sample>
  <hoge><?=$hoge?></hoge>
  <fuga><?=$fuga?></fuga>
</Sample>

TemplateUtil.php

<?php

class TemplateUtil{
  public static function evalTemplate($template_file, $vars)
  {
    ob_start();
    foreach($vars as $key=>$val){
      ${$key} = $val;
    }

    require($template_file);

    $contents = ob_get_contents();
    ob_end_clean();

    return $contents;
  }
}

TemplateUtilTest.php

<?php
require_once('TemplateUtil.php');

class TemplateUtilTest extends PHPUnit_Framework_TestCase{

  public function test_evalTemplate()
  {
    $template_file = 'sample.xml.tmpl';
    $contents = TemplateUtil::evalTemplate($template_file, ['fuga'=>'456']);
    $expect = <<<XML
<Sample>
  <hoge>123</hoge>
  <fuga>456</fuga>
</Sample>

XML;
    $this->assertEquals($expect, $contents);
  }
}