sj-i

<?php

use FFI\CData;

$ffi = FFI::cdef(
    <<<CDEF
    typedef void (*func)(void (*callable1)(void), const char *(*callable2)(const char *));
    struct tmp {
        func fp;
    };

sj-i

<?php
use FFI\CData;

$ffi = FFI::cdef('void qsort(void *base, size_t num, size_t size, int (*compare)(const void*, const void*));');

$arr = FFI::new('int[2]');
$arr[0] = 1;
$arr[1] = 2;

while (true) {

sj-i

コード的な OSS 活動は https://github.com/sj-i

Presentations

• 導入から 10 年、PHP の trait は滅びるべきなのか その適切な使いどころと弱点、将来について [PHP Conference Japan 2022]
• PHP で PHP のプロファイラをつくろう [PHPerKaigi 2022]
• モダン PHP テクニック 12 選 [PHPerKaigi petit 2021.Dec]
• PHP 8 と V8 (JavaScript) で速さを見比べてみよう！ [PHP Conference Japan 2021]
• PHP でファイルシステムを作ろう [PHPerKaigi 2021]
• PHP 8 で Web 以外の世界の扉を叩く [PHP Conference Japan 2020]
• PHP で実行中のスクリプトの動作を下から覗き見る [Tagayas 2020.Nov]

sj-i

I will introduce use cases for which traits can be useful in this post. It also mentions some weaknesses of traits, for helping considerations of alternatives.

This post was created as a response to a discussion I had when I submitted an RFC that would allow for constants in traits [1] and that it should not be improved because traits should die in the first place [2].

Use cases for traits

In my opinion, the following are possible valid use cases for traits, and actual use cases may be a combination of several of these.

• Providing a default implementation of an interface
• Achieving multiple inheritance
• Splitting class implementations

sj-i

<?php

declare(strict_types=1);

const WC_NO_BEST_FIT_CHARS = 0x00000400;

function test(string $utf8_str, bool $best_fit): void {
    $ffi = \FFI::cdef(<<<CDECLS
        int WideCharToMultiByte(
            unsigned int CodePage,

sj-i

<?php
/**
 * Merged
 *  - https://github.com/nfc-tools/libnfc/blob/master/libnfc/nfc-internal.h
 *  - https://github.com/nfc-tools/libnfc/blob/2b5ad9ce0be19fbca5abc04b4ee0b59fb612e590/include/nfc/nfc-types.h
 *
 * @license https://github.com/nfc-tools/libnfc/blob/master/COPYING
 */
$ffi = FFI::cdef(<<<_
    /**

sj-i

I tested my profiler using https://gist.github.com/Girgias/e21b57cff72b8d05be06883d98552ee6 . The profiler is slightly modified to get information about which opcode is how much used. https://github.com/sj-i/php-profiler/tree/experiment-opcode-tracer

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