Test PHP's function call vs direct access to public static variable

func-vs-var.php

<?php

/*
 * Test how function calls compare to direct variable access for simple things
 * like switching some flag/option.
 *
 * Output should show something like:
 *
 * 	Direct access took: 0.14991188049316s
 * 	Function call took: 0.55304503440857s
 *
 */

	class Foo {
		public static $test;

		public function begin() {
			self::$test = true;
		}

		public function end() {
			self::$test = false;
		}
	}

	function dummy() {
		$a = 42;
	}

	// Benchmark access to static variable
	$start = microtime(true);
	for ($i = 100000; $i > 0; $i--) {
		Foo::$test = true;

		dummy();

		Foo::$test = false;
	}
	$end = microtime(true) - $start;
	echo "Direct access took: {$end}s\n";

	// Benchmark function calls
	$start = microtime(true);
	for ($i = 100000; $i > 0; $i--) {
		Foo::begin();

		dummy();

		Foo::end();
	}
	$end = microtime(true) - $start;
	echo "Function call took: {$end}s\n";