Online PHP editor | refs for f17lt

<?php $start = microtime(true); for ($i=0; $i<1e4; $i++) { $string = sprintf("%s%s$%s%s", $i, $i, '123', 'Test'); } $end = microtime(true); echo "Took: ", number_format(($end-$start)*1e3, 2), 'ms', PHP_EOL; $a = '123'; $b = 'Test'; $start = microtime(true); for ($i=0; $i<1e4; $i++) { $string = "$i$i$123$a$b"; } $end = microtime(true); echo "Took: ", number_format(($end-$start)*1e3, 2), 'ms', PHP_EOL;