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  1. <?php
  2.  
  3. $foo = "SOpt";
  4.  
  5. function foo () {
  6.  
  7.     global $foo;
  8.  
  9.     $var = "foo";
  10.  
  11.     echo $$var, PHP_EOL;
  12. }
  13.  
  14. foo();
Success #stdin #stdout 0s 82880KB
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Standard input is empty
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SOpt
https://ideone.com/JncC2t
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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