3v4l.org

run code in 300+ PHP versions simultaneously

sponsor
bughunt
search
recent
about

@ 2021-05-26T21:47:24Z

<?php

$x = function ($a) {
  return $a * 2;
};

assert( 
  true === is_callable($x) 
);

assert( 
  4 == $x(2) 
);

Output
Performance
VLD
References
Branches

assert: documentation ( source)
is_callable: documentation ( source)

preferences:dark modelive preview

52.94 ms | 402 KiB | 5 Q