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  1. <?php
  2.  
  3. // your code goes here
  4.  
  5. $a = null;
  6.  
  7. echo isset($a) ? "co" : "Ko";
Success #stdin #stdout 0.03s 25984KB
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stdin
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Standard input is empty
stdout
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Ko
https://ideone.com/i8nofR
language:
PHP (php 7.3.5)
created:
3 days ago
visibility:
public

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