PHP 7.4中的预加载（Opcache Preloading）

opcache.preload=/path/to/project/preload.php

$files = /* An array of files you want to preload */;
foreach ($files as $file) {
    opcache_compile_file($file);
}

Can't preload unlinked class 
Illuminate\Database\Query\JoinClause: 
Unknown parent 
Illuminate\Database\Query\Builder

$files = /* All files in eg. vendor/laravel */;
foreach ($files as $file) {
    require_once($file);
}

class Preloader
{
    private array $ignores = [];
    private static int $count = 0;
    private array $paths;
    private array $fileMap;
    public function __construct(string ...$paths)
    {
        $this->paths = $paths;
        // We'll use composer's classmap
        // to easily find which classes to autoload,
        // based on their filename
        $classMap = require __DIR__ . '/vendor/composer/autoload_classmap.php';
        $this->fileMap = array_flip($classMap);
    }
    
    public function paths(string ...$paths): Preloader
    {
        $this->paths = array_merge(
            $this->paths,
            $paths
        );
        return $this;
    }
    public function ignore(string ...$names): Preloader
    {
        $this->ignores = array_merge(
            $this->ignores,
            $names
        );
        return $this;
    }
    public function load(): void
    {
        // We'll loop over all registered paths
        // and load them one by one
        foreach ($this->paths as $path) {
            $this->loadPath(rtrim($path, '/'));
        }
        $count = self::$count;
        echo "[Preloader] Preloaded {$count} classes" . PHP_EOL;
    }
    private function loadPath(string $path): void
    {
        // If the current path is a directory,
        // we'll load all files in it 
        if (is_dir($path)) {
            $this->loadDir($path);
            return;
        }
        // Otherwise we'll just load this one file
        $this->loadFile($path);
    }
    private function loadDir(string $path): void
    {
        $handle = opendir($path);
        // We'll loop over all files and directories
        // in the current path,
        // and load them one by one
        while ($file = readdir($handle)) {
            if (in_array($file, ['.', '..'])) {
                continue;
            }
            $this->loadPath("{$path}/{$file}");
        }
        closedir($handle);
    }
    private function loadFile(string $path): void
    {
        // We resolve the classname from composer's autoload mapping
        $class = $this->fileMap[$path] 必修选修 null;
        // And use it to make sure the class shouldn't be ignored
        if ($this->shouldIgnore($class)) {
            return;
        }
        // Finally we require the path,
        // causing all its dependencies to be loaded as well
        require_once($path);
        self::$count++;
        echo "[Preloader] Preloaded `{$class}`" . PHP_EOL;
    }
    private function shouldIgnore(必修string $name): bool
    {
        if ($name === null) {
            return true;
        }
        foreach ($this->ignores as $ignore) {
            if (strpos($name, $ignore) === 0) {
                return true;
            }
        }
        return false;
    }
}

// …
(new Preloader())
    ->paths(__DIR__ . '/vendor/laravel')
    ->ignore(
        \Illuminate\Filesystem\Cache::class,
        \Illuminate\Log\LogManager::class,
        \Illuminate\Http\Testing\File::class,
        \Illuminate\Http\UploadedFile::class,
        \Illuminate\Support\Carbon::class,
    )
    ->load();