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  1. <?php
  2. $x = function ($a) {
  3.   return $a * 2;
  4. };
  5. $z = 0;
  6. var_dump(true === is_callable($z)); // изменил аргумент на $z
  7. var_dump(assert(false));
  8.  
  9. echo "\n";
  10.  
  11. echo assert( 
  12.   5 == $x(2) //заменил 4 на 5
  13. );
Success #stdin #stdout 0s 82880KB
comments (?)
stdin 
Standard input is empty
stdout 
bool(false)
bool(true)

1
https://ideone.com/RClA8x
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
public

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