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@ 2015-12-19T19:11:49Z

<?php

$hola = null;

echo $hola??'no definido';

$hola = false;

print_r( $hola??'no definido' );

Output
Performance
VLD
References
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print_r: documentation ( source)

preferences:dark modelive preview

33.3 ms | 402 KiB | 5 Q