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  1. <?php
  2. $val1 = NULL;
  3. $val2 = 0;
  4.  
  5. var_dump(is_null($val1)); //true
  6. var_dump(is_null($val2)); //false
  7.  
  8. var_dump($val1 === 0); //false
  9. var_dump($val2 === 0); //true
Success #stdin #stdout 0s 82880KB
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Standard input is empty
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bool(true)
bool(false)
bool(false)
bool(true)
https://ideone.com/TpPQQi
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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