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  1. <?php
  2.  
  3. echo phpversion();
  4.  
  5. echo PHP_EOL;
  6.  
  7. $valor = null;
  8.  
  9. var_dump(is_null($valor));
  10. echo PHP_EOL;
  11. var_dump(($valor) == null);
  12. echo PHP_EOL;
  13. var_dump(($valor) === null);
  14. echo PHP_EOL;
Success #stdin #stdout 0s 82880KB
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7.1.1-1
bool(true)

bool(true)

bool(true)
https://ideone.com/EsaNi3
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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