<?php
echo PHP_EOL;
$valor = null;
echo PHP_EOL;
echo PHP_EOL;
echo PHP_EOL;
PD9waHAKCmVjaG8gcGhwdmVyc2lvbigpOwoKZWNobyBQSFBfRU9MOwoKJHZhbG9yID0gbnVsbDsKCnZhcl9kdW1wKGlzX251bGwoJHZhbG9yKSk7CmVjaG8gUEhQX0VPTDsKdmFyX2R1bXAoKCR2YWxvcikgPT0gbnVsbCk7CmVjaG8gUEhQX0VPTDsKdmFyX2R1bXAoKCR2YWxvcikgPT09IG51bGwpOwplY2hvIFBIUF9FT0w7