Online PHP editor | rfc for kK9sE

@ 2021-01-09T12:09:05Z

<?php

$postcard = 'postcard';
$car = 'car';

$arr_postcard = str_split($postcard);
$arr_car = str_split($car);


function array_diff_once($array1, $array2) {
    foreach($array2 as $a) {
        $pos = array_search($a, $array1);
        if($pos !== false) {
            unset($array1[$pos]);
        }
    }

    return $array1;
}

$uncommon = count($arr_postcard) >= count($arr_car) ?  array_diff_once($arr_postcard,$arr_car) : array_diff_once($arr_car,$arr_postcard);

echo 'Letters not in common: ' . implode(' - ', $uncommon) . PHP_EOL;

function array_intersect_once($array1, $array2) {
    $array = [];
    foreach($array1 as $a) {
        $pos = array_search($a, $array2);
        if($pos !== false) {
            $array[] = $a;
        }
    }

    return $array;
}
$common = count($arr_postcard) >= count($arr_car) ?  array_intersect_once($arr_car,$arr_postcard) : array_intersect_once($arr_postcard,$arr_car);

echo 'Letters in common: ' . implode(' - ', $common) . PHP_EOL;

Output for git.master, git.master_jit, rfc.property-hooks: Letters not in common: p - o - s - t - d Letters in common: c - a - r

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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