Online PHP editor | output for JqcaY

@ 2016-02-02T11:09:31Z

<?php

class CountMe implements Countable
{
    private $_count;

    public function __construct($fixedCount)
    {
        $this->_count = $fixedCount;
    }

    public function count()
    {
        return $this->_count;
    }
} 

$fourtytwo = new CountMe(42);
$zero = new CountMe(0);

var_dump(
    count($fourtytwo),
    count($fourtytwo)==0,
    empty($fourtytwo),
    $fourtytwo == array(),
    $fourtytwo === array()
);

print str_repeat('-', 42)."\n";

var_dump(
    count($zero),
    count($zero)==0,
    empty($zero),
    $zero == array(),
    $zero === array()
);

Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13: Deprecated: Return type of CountMe::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/JqcaY on line 12 int(42) bool(false) bool(false) bool(false) bool(false) ------------------------------------------ int(0) bool(true) bool(false) bool(false) bool(false)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30: int(42) bool(false) bool(false) bool(false) bool(false) ------------------------------------------ int(0) bool(true) bool(false) bool(false) bool(false)

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