fork download
copy 
  1. <?php
  2.  
  3. $foo = null;
  4. echo (isset($foo) ? 1 : 0).PHP_EOL;
  5. echo ($foo ? 1 : 0).PHP_EOL;
  6.  
  7. $foo = false;
  8. echo (isset($foo) ? 1 : 0).PHP_EOL;
  9. echo ($foo ? 1 : 0).PHP_EOL;
  10.  
  11. $foo = 0;
  12. echo (isset($foo) ? 1 : 0).PHP_EOL;
  13. echo ($foo ? 1 : 0).PHP_EOL;
Success #stdin #stdout 0.02s 25548KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
0
0
1
0
1
0
https://ideone.com/QK47J2
language:
PHP (php 7.3.5)
created:
2 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!