smarty/tests/UnitTests/SmartyMethodsTests/RegisterModifier/RegisterModifierFirstClassCallablesTest.php

<?php
// first class callables where introduced in PHP 8.1
if (PHP_VERSION_ID >= 80100) {

	/**
	 * class for register modifier with (first class) callables tests
	 *
	 * @runTestsInSeparateProcess
	 * @preserveGlobalState disabled
	 * @backupStaticAttributes enabled
	 */
	class RegisterModifierFirstClassCallablesTest extends PHPUnit_Smarty
	{
		public function setUp(): void
		{
			$this->setUpSmarty(__DIR__);
		}


		public function testInit()
		{
			$this->cleanDirs();
		}

		public function testRegisterFirstClassCallable()
		{
			$this->smarty->registerPlugin(Smarty::PLUGIN_MODIFIER, 'testmodifier', eval('return strrev(...);'));
			$this->assertEquals('mosredna', $this->smarty->fetch('string:{"andersom"|testmodifier}'));
		}

		public function testRegisterFirstClassCallableSameName()
		{
			$this->smarty->registerPlugin(Smarty::PLUGIN_MODIFIER, 'mymodifier', eval('return strrev(...);'));
			$this->assertEquals('mosredna', $this->smarty->fetch('string:{"andersom"|mymodifier}'));
		}

		public function testRegisterFirstClassCallableAsFunc()
		{
			$this->smarty->registerPlugin(Smarty::PLUGIN_MODIFIER, 'kprint_r_out', eval('return strrev(...);'));
			$this->smarty->assign('myVar', 'andersom');
			$this->assertEquals('mosredna', $this->smarty->fetch('string:{kprint_r_out($myVar)}'));
		}

		public function testRegisterFirstClassCallableSameNameAsPhpFunc()
		{
			$this->smarty->registerPlugin(Smarty::PLUGIN_MODIFIER, 'mymodifierfcc', eval('return strrev(...);'));
			$this->assertEquals('mosredna', $this->smarty->fetch('string:{mymodifierfcc("andersom")}'));
		}

	}
}
function mymodifierfcc($a, $b, $c)
{
	return "$a function $b $c";
}