- microtime: documentation ( source)
- printf: documentation ( source)
<?php
$times = 10000;
$var = null;
$var = new stdClass();
$time1 = microtime(true);
for ($i = 0; $i <= $times; $i++) {
if (!$var) {}
}
$time1 = microtime(true) - $time1;
echo "Time using '!': $time1\n";
$time2 = microtime(true);
for ($i = 0; $i <= $times; $i++) {
if ($var === null) {}
}
$time2 = microtime(true) - $time2;
echo "Time using '===': $time2\n";
if ($time1 > $time2){
$p = (($time1-$time2)/$time2) * 100;
printf("'===' was faster by %.2f percent.", $p);
} else {
$p = (($time2-$time1)/$time1) * 100;
printf("'!' was faster by %.2f percent.", $p);
}