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  1. <?php
  2.  
  3. /**
  4.  * A general-purpose implementation that includes the optional functionality
  5.  * of allowing multiple base directories for a single namespace prefix.
  6.  */
  7. class Psr4Autoloader
  8. {
  9.     const EXTENSION = '.php';
  10.     /**
  11.      * An associative array where the key is a namespace prefix and the value
  12.      * is an array of base directories for classes in that namespace.
  13.      *
  14.      * @var array
  15.      */
  16.     protected $prefixes = [];
  17.     /**
  18.      * Register loader with SPL autoloader stack.
  19.      * 
  20.      * @param bool $prepend If true, will prepend the autoloader on
  21.      * the autoload queue instead of appending it.
  22.      * @return $this
  23.      */
  24.     public function register($prepend = false)
  25.     {
  26.         spl_autoload_register([$this, 'loadClass'], true, $prepend);
  27.         return $this;
  28.     }
  29.     /**
  30.      * Unregister loader with SPL autoloader stack.
  31.      * 
  32.      * @return void
  33.      */
  34.     public function unregister()
  35.     {
  36.         spl_autoload_unregister([$this, 'loadClass']);
  37.     }
  38.  
  39.     /**
  40.      * Adds a base directory for a namespace prefix.
  41.      *
  42.      * @param string $prefix The namespace prefix.
  43.      * @param string $baseDir A base directory for class files in the namespace.
  44.      * @param bool $prepend If true, prepend the base directory to the stack.
  45.      * instead of appending it, this causes it to be searched first rather than
  46.      * last.
  47.      * @return this
  48.      */
  49.     public function addPrefix($prefix, $baseDir, $prepend = false)
  50.     {
  51.         // Normalize namespace prefix.
  52.         $prefix = trim($prefix, '\\') . '\\';
  53.         // Normalize the base directory with a trailing separator.
  54.         $baseDir = realpath($baseDir) . DIRECTORY_SEPARATOR;
  55.         // Initialize the namespace prefix array.
  56.         if (!isset($this->prefixes[$prefix])) {
  57.             $this->prefixes[$prefix] = [];
  58.         }
  59.         // Retain the base directory for the namespace prefix.
  60.         if ($prepend) {
  61.             array_unshift($this->prefixes[$prefix], $baseDir);
  62.         } else {
  63.             array_push($this->prefixes[$prefix], $baseDir);
  64.         }
  65.         return $this;
  66.     }
  67.  
  68.     /**
  69.      * Loads the class file for a given class name.
  70.      *
  71.      * @param string $class The fully-qualified class name.
  72.      * @return bool
  73.      */
  74.     public function loadClass($class)
  75.     {
  76.         if (strpos($class, '\\') !== false) {
  77.             foreach ($this->prefixes as $namespace => $baseDirs) {
  78.                 if (strpos($class, $namespace) === 0) {
  79.                     $path = substr($class, strlen($namespace));
  80.                     $path = str_replace('\\', DIRECTORY_SEPARATOR, $path) . self::EXTENSION;
  81.                     foreach ($baseDirs as $baseDir) {
  82.                         $file = $baseDir . $path;
  83.                         // If the mapped file exists, require it
  84.                         if ($this->requireFile($file)) {
  85.                             return $file;
  86.                         }
  87.                     }
  88.                 }
  89.             }
  90.         }
  91.         // Never found a mapped file
  92.         return false;
  93.     }
  94.     /**
  95.      * If a file exists, require it from the file system.
  96.      * 
  97.      * @param string $file The file to require.
  98.      * @return bool
  99.      */
  100.     protected function requireFile($file)
  101.     {
  102.         if (file_exists($file)) {
  103.             require $file;
  104.             return true;
  105.         }
  106.         return false;
  107.     }
  108. }
  109.  
  110. class MockPsr4AutoloaderClass extends Psr4Autoloader
  111. {
  112.     protected $files = array();
  113.  
  114.     public function setFiles(array $files)
  115.     {
  116.         $this->files = $files;
  117.     }
  118.  
  119.     protected function requireFile($file)
  120.     {
  121.         return in_array($file, $this->files);
  122.     }
  123. }
  124.  
  125. $loader = new MockPsr4AutoloaderClass;
  126.  
  127. $loader->setFiles(array(
  128.     '/vendor/foo.bar/src/ClassName.php',
  129.     '/vendor/foo.bar/src/DoomClassName.php',
  130.     '/vendor/foo.bar/tests/ClassNameTest.php',
  131.     '/vendor/foo.bardoom/src/ClassName.php',
  132.     '/vendor/foo.bar.baz.dib/src/ClassName.php',
  133.     '/vendor/foo.bar.baz.dib.zim.gir/src/ClassName.php',
  134. ));
  135.  
  136. $loader->addPrefix(
  137.     'Foo\Bar',
  138.     '/vendor/foo.bar/src'
  139. );
  140.  
  141. $loader->addPrefix(
  142.     'Foo\Bar',
  143.     '/vendor/foo.bar/tests'
  144. );
  145.  
  146. $loader->addPrefix(
  147.     'Foo\BarDoom',
  148.     '/vendor/foo.bardoom/src'
  149. );
  150.  
  151. $loader->addPrefix(
  152.     'Foo\Bar\Baz\Dib',
  153.     '/vendor/foo.bar.baz.dib/src'
  154. );
  155.  
  156. $loader->addPrefix(
  157.     'Foo\Bar\Baz\Dib\Zim\Gir',
  158.     '/vendor/foo.bar.baz.dib.zim.gir/src'
  159. );
  160.  
  161. assert_options(ASSERT_ACTIVE, 1);
  162.  
  163. var_dump($loader->loadClass('Foo\Bar\ClassName')); echo PHP_EOL;
  164. assert($loader->loadClass('Foo\Bar\ClassName') === '/vendor/foo.bar/src/ClassName.php');
  165.  
  166. var_dump($loader->loadClass('Foo\Bar\ClassNameTest')); echo PHP_EOL;
  167. assert($loader->loadClass('Foo\Bar\ClassNameTest') === '/vendor/foo.bar/tests/ClassNameTest.php');
  168.  
  169. var_dump($loader->loadClass('No_Vendor\No_Package\NoClass')); echo PHP_EOL;
  170. assert($loader->loadClass('No_Vendor\No_Package\NoClass') === false);
  171.  
  172. var_dump($loader->loadClass('Foo\Bar\Baz\Dib\Zim\Gir\ClassName')); echo PHP_EOL;
  173. assert($loader->loadClass('Foo\Bar\Baz\Dib\Zim\Gir\ClassName') === '/vendor/foo.bar.baz.dib.zim.gir/src/ClassName.php');
  174.  
  175. var_dump($loader->loadClass('Foo\Bar\DoomClassName')); echo PHP_EOL;
  176. assert($loader->loadClass('Foo\Bar\DoomClassName') === '/vendor/foo.bar/src/DoomClassName.php');
  177.  
  178. var_dump($loader->loadClass('Foo\BarDoom\ClassName')); echo PHP_EOL;
  179. assert($loader->loadClass('Foo\BarDoom\ClassName') === '/vendor/foo.bardoom/src/ClassName.php');
  180.  
Success #stdin #stdout #stderr 0.03s 52480KB
comments (?)
stdin
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Standard input is empty
stdout
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bool(false)

bool(false)

bool(false)

bool(false)

bool(false)

bool(false)
stderr
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PHP Warning:  assert(): Assertion failed in /home/eZneGQ/prog.php on line 164
PHP Warning:  assert(): Assertion failed in /home/eZneGQ/prog.php on line 167
PHP Warning:  assert(): Assertion failed in /home/eZneGQ/prog.php on line 173
PHP Warning:  assert(): Assertion failed in /home/eZneGQ/prog.php on line 176
PHP Warning:  assert(): Assertion failed in /home/eZneGQ/prog.php on line 179
https://ideone.com/7AIrfE
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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