Online PHP editor | refs for opDvE

<pre><?php $vars['x'] = 10; $vars['y'] = 100; $vars['a'] = '1'; $vars['b'] = 1.1; $start = microtime(true); for ($i = 0; $i<1000000; $i++) { $foo = sprintf('from %s to %s %s %s', $vars['x'], $vars['y'], $vars['a'], $vars['b']); } var_dump(microtime(true) - $start); $start = microtime(true); for ($i = 0; $i<1000000; $i++) { $foo = 'from ' . $vars['x'] . ' to ' . $vars['y'] . ' ' . $vars['a'] . ' '. $vars['b']; } var_dump(microtime(true) - $start); $start = microtime(true); for ($i = 0; $i<1000000; $i++) { $foo = "from {$x} to {$y} {$a} {$b}"; } var_dump(microtime(true) - $start);