Một ví dụ sử dụng class Psr4AutoloaderClass (ok)

https://www.php-fig.org/psr/psr-4/examples

https://index.phpindex.php

<?php
require_once "example/loader.php";
$loader = new Example\Psr4AutoloaderClass;
$loader->register();
$loader->addNamespace('Foo\Bar\Qux', __DIR__ . '/src/Qux');
new Foo\Bar\Qux\Quux;

example/loader.php

<?php
namespace Example;
class Psr4AutoloaderClass {
  /**
   * An associative array where the key is a namespace prefix and the value
   * is an array of base directories for classes in that namespace.
   *
   * @var array
   */
  protected $prefixes = array();
  /**
   * Register loader with SPL autoloader stack.
   *
   * @return void
   */
  public function register() {
    spl_autoload_register(array($this, 'loadClass'));
  }
  /**
   * Adds a base directory for a namespace prefix.
   *
   * @param string $prefix The namespace prefix.
   * @param string $base_dir A base directory for class files in the
   * namespace.
   * @param bool $prepend If true, prepend the base directory to the stack
   * instead of appending it; this causes it to be searched first rather
   * than last.
   * @return void
   */
  public function addNamespace($prefix, $base_dir, $prepend = false) {
    // normalize namespace prefix
    $prefix = trim($prefix, '\\') . '\\';
    // normalize the base directory with a trailing separator
    $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';
    // initialize the namespace prefix array
    if (isset($this->prefixes[$prefix]) === false) {
      $this->prefixes[$prefix] = array();
    }
    // retain the base directory for the namespace prefix
    if ($prepend) {
      array_unshift($this->prefixes[$prefix], $base_dir);
    } else {
      array_push($this->prefixes[$prefix], $base_dir);
    }
  }
  /**
   * Loads the class file for a given class name.
   *
   * @param string $class The fully-qualified class name.
   * @return mixed The mapped file name on success, or boolean false on
   * failure.
   */
  public function loadClass($class) {
    // the current namespace prefix
    $prefix = $class;
    // work backwards through the namespace names of the fully-qualified
    // class name to find a mapped file name
    while (false !== $pos = strrpos($prefix, '\\')) {
      // retain the trailing namespace separator in the prefix
      $prefix = substr($class, 0, $pos + 1);
      // the rest is the relative class name
      $relative_class = substr($class, $pos + 1);
      // try to load a mapped file for the prefix and relative class
      $mapped_file = $this->loadMappedFile($prefix, $relative_class);
      if ($mapped_file) {
        return $mapped_file;
      }
      // remove the trailing namespace separator for the next iteration
      // of strrpos()
      $prefix = rtrim($prefix, '\\');
    }
    // never found a mapped file
    return false;
  }
  /**
   * Load the mapped file for a namespace prefix and relative class.
   *
   * @param string $prefix The namespace prefix.
   * @param string $relative_class The relative class name.
   * @return mixed Boolean false if no mapped file can be loaded, or the
   * name of the mapped file that was loaded.
   */
  protected function loadMappedFile($prefix, $relative_class) {
    // are there any base directories for this namespace prefix?
    if (isset($this->prefixes[$prefix]) === false) {
      return false;
    }
    // look through base directories for this namespace prefix
    foreach ($this->prefixes[$prefix] as $base_dir) {
      // replace the namespace prefix with the base directory,
      // replace namespace separators with directory separators
      // in the relative class name, append with .php
      $file = $base_dir
        . str_replace('\\', '/', $relative_class)
        . '.php';
      // if the mapped file exists, require it
      if ($this->requireFile($file)) {
        // yes, we're done
        return $file;
      }
    }
    // never found it
    return false;
  }
  /**
   * If a file exists, require it from the file system.
   *
   * @param string $file The file to require.
   * @return bool True if the file exists, false if not.
   */
  protected function requireFile($file) {
    if (file_exists($file)) {
      require $file;
      return true;
    }
    return false;
  }
}

src/Qux/Quux.php

<?php
namespace Foo\Bar\Qux;
class Quux {
	public function __construct() {
		echo "Hello";
	}
}

Full code

4KB

windows.zip

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