Online PHP editor | output for GDOuR

@ 2020-09-14T23:12:14Z

<?php

interface ArrayAccessInterface extends ArrayAccess
{
    public function keyExists(string $offset): bool; 
    public function offsetIsset(string $offset): bool;
}

abstract class ArrayAccessAbstract implements ArrayAccessInterface
{
    public function offsetExists($offset): bool
    {
        return static::offsetIsset((string) $offset);
    }
}

class C extends ArrayAccessAbstract
{
    public $data = array(
        "foo" => null
    );
    public function keyExists(string $offset): bool
    {
        return array_key_exists($offset, $this->data);
    }
    public function offsetIsset(string $offset): bool
    {
        return isset($this->data[$offset]);
    }
    public function offsetGet($offset)
    {
        return $this->data[$offset];
    }
    public function offsetSet($offset, $value): void
    {
        $this->data[$offset] = $value;
    }
    public function offsetUnset($offset): void
    {
        unset($this->data[$offset]);
    }
}

$o = new C();

var_dump(empty($o['foo']));
var_dump(isset($o['foo']));
var_dump($o->keyExists('foo'));
var_dump(property_exists($o, 'foo'));
#var_dump(array_key_exists('foo', $o));
#var_dump(array_key_exists('foo', ['foo' => null]));

Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Deprecated: Return type of C::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/GDOuR on line 30 bool(true) bool(false) bool(true) bool(false)
Output for 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: bool(true) bool(false) bool(true) bool(false)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/GDOuR on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/GDOuR on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING in /in/GDOuR on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING in /in/GDOuR on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/GDOuR on line 3
Process exited with code 255.

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