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@ 2015-09-30T13:58:44Z

<?php

final class Contains
{
    /**
     * @var string
     */
    private $comparedValue;
    /**
     * Creates the expression.
     *
     * @param string $comparedValue The compared value.
     */
    public function __construct($comparedValue)
    {
        $this->comparedValue = $comparedValue;
    }
    /**
     * Returns the accepted suffix.
     *
     * @return string The accepted suffix.
     */
    public function getComparedValue()
    {
        return $this->comparedValue;
    }

    public function equivalentTo(Expression $other)
    {
        // Since this class is final, we can check with instanceof
        return $other instanceof $this && $this->comparedValue == $other->comparedValue;
    }
}

$a = new Contains('foobar');

$b = new Contains(0);

var_dump($a->equivalentTo($b));

Output for git.master, git.master_jit, rfc.property-hooks: Fatal error: Uncaught TypeError: Contains::equivalentTo(): Argument #1 ($other) must be of type Expression, Contains given, called in /in/GeKPX on line 39 and defined in /in/GeKPX:28 Stack trace: #0 /in/GeKPX(39): Contains->equivalentTo(Object(Contains)) #1 {main} thrown in /in/GeKPX on line 28
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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