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@ 2015-12-28T23:29:48Z

<?php

class States implements \ArrayAccess
{
    
    private $states = [];

    /**
     * @param mixed $offset
     *
     * @return bool
     */
    public function offsetExists($offset)
    {
        return array_key_exists($offset, $this->states);
    }

    /**
     * @param mixed $offset
     *
     * @throws UnknownStateException
     *
     * @return AllianceState
     */
    public function offsetGet($offset)
    {
        if ( ! $this->offsetExists($offset)) {
            throw new UnknownStateException();
        }

        return $this->states[$offset];
    }

    /**
     * @param mixed $offset
     * @param mixed $value
     *
     * @throws InvalidArgumentException
     */
    public function offsetSet($offset, $value)
    {

        $offset = count($this->states);

        $this->states[$offset] = $value;
    }

    /**
     * @param mixed $offset
     *
     * @throws UnknownStateException
     */
    public function offsetUnset($offset)
    {
        unset($this->states[$offset]);

        $this->states = array_values($this->states);
    }
}

$states = new States();
$states->add('foo');
$states->add('bar');

var_dump($states);

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Return type of States::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/b89Xl on line 13 Deprecated: Return type of States::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/b89Xl on line 25 Deprecated: Return type of States::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/b89Xl on line 40 Deprecated: Return type of States::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/b89Xl on line 53 Fatal error: Uncaught Error: Call to undefined method States::add() in /in/b89Xl:62 Stack trace: #0 {main} thrown in /in/b89Xl on line 62
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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