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@ 2020-12-10T09:08:02Z

<?php

const START = 1;
const END   = 100;

/**
 * バックトレースの深さからインデックス相当の値を取得
 * @return int
 */
function getI()
{
    // debug_backtrace: バックトレースを配列で生成
    // @see https://www.php.net/manual/ja/function.debug-backtrace.php
    // count: 配列の長さを取得
    // @see https://www.php.net/manual/ja/function.count.php
    return count(debug_backtrace()) - 2 + START;
}

/**
 * 再帰で Fizz, Buzz を echo
 */
function echoFizzBuzz()
{
    if (getI() % 15 === 0) {
        echo getI().': FizzBuzz';
    } elseif (getI() % 3 === 0) {
        echo getI().': Fizz';
    } elseif (getI() % 5 === 0) {
        echo getI().': Buzz';
    } else {
        echo getI().': '.getI();
    }
    echo "\n";
    // 再帰で一次変数抜きにループを実現する
    // 再帰でバックトレースを深くしてインデックスを進める
    if (getI() < END) {
        echoFizzBuzz();
    }
}

echoFizzBuzz();

Output for git.master, git.master_jit, rfc.property-hooks: 1: 1 2: 2 3: Fizz 4: 4 5: Buzz 6: Fizz 7: 7 8: 8 9: Fizz 10: Buzz 11: 11 12: Fizz 13: 13 14: 14 15: FizzBuzz 16: 16 17: 17 18: Fizz 19: 19 20: Buzz 21: Fizz 22: 22 23: 23 24: Fizz 25: Buzz 26: 26 27: Fizz 28: 28 29: 29 30: FizzBuzz 31: 31 32: 32 33: Fizz 34: 34 35: Buzz 36: Fizz 37: 37 38: 38 39: Fizz 40: Buzz 41: 41 42: Fizz 43: 43 44: 44 45: FizzBuzz 46: 46 47: 47 48: Fizz 49: 49 50: Buzz 51: Fizz 52: 52 53: 53 54: Fizz 55: Buzz 56: 56 57: Fizz 58: 58 59: 59 60: FizzBuzz 61: 61 62: 62 63: Fizz 64: 64 65: Buzz 66: Fizz 67: 67 68: 68 69: Fizz 70: Buzz 71: 71 72: Fizz 73: 73 74: 74 75: FizzBuzz 76: 76 77: 77 78: Fizz 79: 79 80: Buzz 81: Fizz 82: 82 83: 83 84: Fizz 85: Buzz 86: 86 87: Fizz 88: 88 89: 89 90: FizzBuzz 91: 91 92: 92 93: Fizz 94: 94 95: Buzz 96: Fizz 97: 97 98: 98 99: Fizz 100: Buzz

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Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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