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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\DependencyInjection\LazyProxy;
  13  
  14  /**
  15   * @author Nicolas Grekas <p@tchwork.com>
  16   *
  17   * @internal
  18   */
  19  class ProxyHelper
  20  {
  21      /**
  22       * @return string|null The FQCN or builtin name of the type hint, or null when the type hint references an invalid self|parent context
  23       */
  24      public static function getTypeHint(\ReflectionFunctionAbstract $r, \ReflectionParameter $p = null, $noBuiltin = false)
  25      {
  26          if ($p instanceof \ReflectionParameter) {
  27              if (method_exists($p, 'getType')) {
  28                  $type = $p->getType();
  29              } elseif (preg_match('/^(?:[^ ]++ ){4}([a-zA-Z_\x7F-\xFF][^ ]++)/', $p, $type)) {
  30                  $name = $type = $type[1];
  31  
  32                  if ('callable' === $name || 'array' === $name) {
  33                      return $noBuiltin ? null : $name;
  34                  }
  35              }
  36          } else {
  37              $type = method_exists($r, 'getReturnType') ? $r->getReturnType() : null;
  38          }
  39          if (!$type) {
  40              return null;
  41          }
  42  
  43          $types = [];
  44  
  45          foreach ($type instanceof \ReflectionUnionType ? $type->getTypes() : [$type] as $type) {
  46              $name = $type instanceof \ReflectionNamedType ? $type->getName() : (string) $type;
  47  
  48              if (!\is_string($type) && $type->isBuiltin()) {
  49                  if (!$noBuiltin) {
  50                      $types[] = $name;
  51                  }
  52                  continue;
  53              }
  54  
  55              $lcName = strtolower($name);
  56              $prefix = $noBuiltin ? '' : '\\';
  57  
  58              if ('self' !== $lcName && 'parent' !== $lcName) {
  59                  $types[] = '' !== $prefix ? $prefix.$name : $name;
  60                  continue;
  61              }
  62              if (!$r instanceof \ReflectionMethod) {
  63                  continue;
  64              }
  65              if ('self' === $lcName) {
  66                  $types[] = $prefix.$r->getDeclaringClass()->name;
  67              } else {
  68                  $types[] = ($parent = $r->getDeclaringClass()->getParentClass()) ? $prefix.$parent->name : null;
  69              }
  70          }
  71  
  72          return $types ? implode('|', $types) : null;
  73      }
  74  }