- is_callable: documentation ( source)
<?php
namespace Test;
class Foo
{
public function bar(callable $a)
{
$a();
}
public function hello()
{
echo 'World' . PHP_EOL;
}
}
$foo = new Foo();
echo is_callable(array($foo, 'hello')) . PHP_EOL;
$foo->bar(array($foo, 'hello'));