- time: documentation ( source)
- define: documentation ( source)
<?php
define('NUM_ITERATIONS', 1000000000);
$var = NULL;
// Profile is_null.
$time = time();
for ($i = 0; $i < NUM_ITERATIONS; $i++) { is_null($var); }
print (time() - $time) . ' elapsed seconds.' . PHP_EOL;
// Profile (bool)
$time = time();
for ($i = 0; $i < NUM_ITERATIONS; $i++) { (bool) $var; }
print (time() - $time) . ' elapsed seconds.' . PHP_EOL;
// Profile isset
$time = time();
for ($i = 0; $i < NUM_ITERATIONS; $i++) { isset($var); }
print (time() - $time) . ' elapsed seconds.' . PHP_EOL;