Uppercase Booleans vs. Lowercase in PHP

Question

When I was learning PHP, I read somewhere that you should always use the upper case versions of booleans, TRUE and FALSE, because the \"normal\" lo

Answer 1

Here is my TEST on Windows 7x64bit Apache/2.4.9 PHP/5.5.14

$blockLimit = 50;
while($blockLimit > 0): $blockLimit--;

//STAR Here ================================================

$msc = microtime(true);
for ($i = 0; $i < 100000; $i++) {
   echo (FALSE);
}
echo 'FALSE took ' . number_format(microtime(true)-$msc,4) . " Seconds\r\n";
$msc = microtime(true);
for ($i = 0; $i < 100000; $i++) {
   echo (false);
}
echo 'false took ' . number_format(microtime(true)-$msc,4) . " Seconds\r\n";

echo "\r\n --- \r\n";
//Shutdown ==================================================
endwhile;

This time FALSE won 20 times. So uppercase is faster in my environment.