Performance test of String Concattination in PHP

perf_string_with_vars.php

<?php

$testruns = 10000000;
$controllruns = 3;

$var = 12;
$var2 = 'bar';
$var3 = 'foo';
echo 'PHP Version: ' . phpversion() . PHP_EOL;
echo 'Operating System: ' . php_uname() . PHP_EOL;
for ($j = 0; $j < $controllruns; $j++){
	echo PHP_EOL . '---------------' . PHP_EOL;
	// Single Quotes
	$start = microtime(true);
	for ($i = 0; $i < $testruns; $i++){
		$string = 'This is a Test: var:' . $var . ' var2:' . $var2 . ' var3:' . $var3;
	}
	$end  = microtime(true);
	echo 'single Quote ' . number_format($end - $start, 3) . PHP_EOL;

	// Double Quotes Quotes
	$start = microtime(true);
	for ($i = 0; $i < $testruns; $i++){
		$string = "This is a Test: var:$var var2:$var2 var3:$var3";
	}
	$end  = microtime(true);
	echo 'Dobule Quotes Quote ' . number_format($end - $start, 3) . PHP_EOL;


	// Curly  Quotes Quotes + curly Braces
	$start = microtime(true);
	for ($i = 0; $i < $testruns; $i++){
		$string = "This is a Test: var:{$var} var2:{$var2} var3:{$var3}";
	}
	$end  = microtime(true);
	echo 'Dobule Quotes with curly Braces ' . number_format($end - $start, 3) . PHP_EOL;

	// sprintf
	$start = microtime(true);
	for ($i = 0; $i < $testruns; $i++){
		$string = sprintf('This is a Test: var:%d var2:%s var3:%s', $var, $var2, $var3);
	}
	$end  = microtime(true);
	echo 'sprintf ' . number_format($end - $start, 3) . PHP_EOL;
}