PHPのお勉強！

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PHP 8.4.2 Released!

    A Complete PHP/FFI/preloading Example

    php.ini

    ffi.enable=preload
opcache.preload=preload.php

    preload.php

    <?php
    FFI    ::load(__DIR__ . "/dummy.h");
    opcache_compile_file(__DIR__ . "/dummy.php");
    ?>

    dummy.h

    #define FFI_SCOPE "DUMMY"
#define FFI_LIB "libc.so.6"
 
int printf(const char *format, ...);

    dummy.php

    <?php
    final class Dummy {
    private static     $ffi = null;
    function     __construct() {
    if (    is_null(self::$ffi)) {
    self::$ffi = FFI::scope("DUMMY");
    }
    }
    function     printf($format, ...$args) {
    return (int)     self::$ffi->printf($format, ...$args);
    }
    }
    ?>

    test.php

    <?php
    $d     = new Dummy();
    $d->printf("Hello %s!\n", "world");
    ?>

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