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  1. <?php
  2.  
  3. // your code goes here
  4. echo "!!'true'  : " . (!!'true'  ? "true" : "false") . PHP_EOL;
  5. echo "!!'false' : " . (!!'false' ? "true" : "false") . PHP_EOL;
  6. echo "!!'null'  : " . (!!'null'  ? "true" : "false") . PHP_EOL;
  7. echo "!!null    : " . (!!null    ? "true" : "false") . PHP_EOL;
  8.  
  9. echo "(bool)'true'  : " . ((bool)'true'  ? "true" : "false") . PHP_EOL;
  10. echo "(bool)'false' : " . ((bool)'false' ? "true" : "false") . PHP_EOL;
  11. echo "(bool)'null'  : " . ((bool)'null'  ? "true" : "false") . PHP_EOL;
  12. echo "(bool)null    : " . ((bool)null    ? "true" : "false") . PHP_EOL;
Success #stdin #stdout 0.01s 20520KB
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Standard input is empty
stdout
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!!'true'  : true
!!'false' : true
!!'null'  : true
!!null    : false
(bool)'true'  : true
(bool)'false' : true
(bool)'null'  : true
(bool)null    : false
https://ideone.com/u3gn0c
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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