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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$t = microtime(true);
$i = 0;
while ($i < 10000000) {
$i++;
$foo = is_null($i);
}
echo microtime(true) - $t;
echo PHP_EOL;
$t = microtime(true);
$i = 0;
while ($i < 10000000) {
$i++;
$foo = $i === null;
}
echo microtime(true) - $t;