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  1. <?php
  2. $x = function ($a) {
  3.   return $a * 2;
  4. };
  5. $z = 0;
  6. echo assert( 
  7.   true === is_callable($z) // изменил аргумент на $z
  8. );
  9.  
  10. echo "\n";
  11.  
  12. echo assert( 
  13.   5 == $x(2) //заменил 4 на 5
  14. );
Success #stdin #stdout 0.01s 82752KB
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https://ideone.com/PL3Hdm
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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