- array_map: documentation ( source)
- var_dump: documentation ( source)
- is_callable: documentation ( source)
- method_exists: documentation ( source)
<?php
trait Stuff { function __invoke() { return 'I am ' . get_class($this) . '.'; } }
class Thing { function __invoke() { return 'I am Thing.'; } }
class Thang { use Stuff; }
$things[] = function () { return 'I am Thong.'; };
$things[] = new Thing;
$things[] = new Thang;
$things[] = 'strlen';
$things[] = [$things[0], '__invoke'];
$things[] = [$things[1], '__invoke'];
var_dump(array_map('is_callable', $things));
var_dump(array_map(function ($thing) { return is_object($thing) && method_exists($thing, '__invoke'); }, $things));
var_dump(array_map(function ($thing) { return is_callable($thing, '__invoke') && !is_string($thing); }, $things));