<?php $str = 'apple'; if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') { echo "Would you like a green or red apple?"; } ?>
<?php $file = 'php-5.3.0alpha2-Win32-VC9-x64.zip'; echo 'MD5 file hash of ' . $file . ': ' . md5_file($file); ?>