Online PHP editor | rfc for 6O94O

@ 2014-12-12T03:46:16Z

<?php

// test data

class Foo
{
    private $a;

    public function __construct($a)
    {
        $this->a = (int) $a;
    }
    
    public function hasGreaterAThan(self $another)
    {
        return $this->a > $another->a;
    }
}

$list = [
    $foo1 = new Foo(2),
    $foo2 = new Foo(5),
    $foo3 = new Foo(1),
];


/**
 * Finds an item in a list via a comparison function
 * 
 * @param  array    $aList      the collection to examine
 * @param  callable $comparison should compare two arguments and return a bool
 * @return mixed
 */
$find_by = function(array $aList, callable $comparison) {
    $callback = function($carry, $item) use ($comparison) {
        return ($carry == null || $comparison($item, $carry)) ? $item : $carry;
    };
    return array_reduce($aList, $callback);
};

$greaterA = function(Foo $foo1, Foo $foo2) {
    return $foo1->hasGreaterAThan($foo2);
};

$lesserA = function(Foo $foo1, Foo $foo2) {
    return $foo2->hasGreaterAThan($foo1);
};


assert($find_by($list, $greaterA) === $foo2);
assert($find_by($list, $lesserA) === $foo3);

Output for git.master, git.master_jit, rfc.property-hooks

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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