class ParameterBag

1. 8.x drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/ParameterBag.php \Symfony\Component\HttpFoundation\ParameterBag
2. 8.x drupal/core/vendor/symfony/dependency-injection/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php \Symfony\Component\DependencyInjection\ParameterBag\ParameterBag

ParameterBagTest.php in drupal/core/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php

RequestDataCollector.php in drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php

class ParameterBag implements \IteratorAggregate, \Countable {

  /**
   * Parameter storage.
   *
   * @var array
   */
  protected $parameters;

  /**
   * Constructor.
   *
   * @param array $parameters An array of parameters
   *
   * @api
   */
  public function __construct(array $parameters = array()) {
    $this->parameters = $parameters;
  }

  /**
   * Returns the parameters.
   *
   * @return array An array of parameters
   *
   * @api
   */
  public function all() {
    return $this->parameters;
  }

  /**
   * Returns the parameter keys.
   *
   * @return array An array of parameter keys
   *
   * @api
   */
  public function keys() {
    return array_keys($this->parameters);
  }

  /**
   * Replaces the current parameters by a new set.
   *
   * @param array $parameters An array of parameters
   *
   * @api
   */
  public function replace(array $parameters = array()) {
    $this->parameters = $parameters;
  }

  /**
   * Adds parameters.
   *
   * @param array $parameters An array of parameters
   *
   * @api
   */
  public function add(array $parameters = array()) {
    $this->parameters = array_replace($this->parameters, $parameters);
  }

  /**
   * Returns a parameter by name.
   *
   * @param string  $path    The key
   * @param mixed   $default The default value if the parameter key does not exist
   * @param boolean $deep    If true, a path like foo[bar] will find deeper items
   *
   * @return mixed
   *
   * @throws \InvalidArgumentException
   *
   * @api
   */
  public function get($path, $default = null, $deep = false) {
    if (!$deep || false === ($pos = strpos($path, '['))) {
      return array_key_exists($path, $this->parameters) ? $this->parameters[$path] : $default;
    }
    $root = substr($path, 0, $pos);
    if (!array_key_exists($root, $this->parameters)) {
      return $default;
    }
    $value = $this->parameters[$root];
    $currentKey = null;
    for ($i = $pos, $c = strlen($path); $i < $c; $i++) {
      $char = $path[$i];
      if ('[' === $char) {
        if (null !== $currentKey) {
          throw new \InvalidArgumentException(sprintf('Malformed path. Unexpected "[" at position %d.', $i));
        }
        $currentKey = '';
      }
      elseif (']' === $char) {
        if (null === $currentKey) {
          throw new \InvalidArgumentException(sprintf('Malformed path. Unexpected "]" at position %d.', $i));
        }
        if (!is_array($value) || !array_key_exists($currentKey, $value)) {
          return $default;
        }
        $value = $value[$currentKey];
        $currentKey = null;
      }
      else {
        if (null === $currentKey) {
          throw new \InvalidArgumentException(sprintf('Malformed path. Unexpected "%s" at position %d.', $char, $i));
        }
        $currentKey .= $char;
      }
    }
    if (null !== $currentKey) {
      throw new \InvalidArgumentException(sprintf('Malformed path. Path must end with "]".'));
    }
    return $value;
  }

  /**
   * Sets a parameter by name.
   *
   * @param string $key   The key
   * @param mixed  $value The value
   *
   * @api
   */
  public function set($key, $value) {
    $this->parameters[$key] = $value;
  }

  /**
   * Returns true if the parameter is defined.
   *
   * @param string $key The key
   *
   * @return Boolean true if the parameter exists, false otherwise
   *
   * @api
   */
  public function has($key) {
    return array_key_exists($key, $this->parameters);
  }

  /**
   * Removes a parameter.
   *
   * @param string $key The key
   *
   * @api
   */
  public function remove($key) {
    unset($this->parameters[$key]);
  }

  /**
   * Returns the alphabetic characters of the parameter value.
   *
   * @param string  $key     The parameter key
   * @param mixed   $default The default value if the parameter key does not exist
   * @param boolean $deep    If true, a path like foo[bar] will find deeper items
   *
   * @return string The filtered value
   *
   * @api
   */
  public function getAlpha($key, $default = '', $deep = false) {
    return preg_replace('/[^[:alpha:]]/', '', $this
      ->get($key, $default, $deep));
  }

  /**
   * Returns the alphabetic characters and digits of the parameter value.
   *
   * @param string  $key     The parameter key
   * @param mixed   $default The default value if the parameter key does not exist
   * @param boolean $deep    If true, a path like foo[bar] will find deeper items
   *
   * @return string The filtered value
   *
   * @api
   */
  public function getAlnum($key, $default = '', $deep = false) {
    return preg_replace('/[^[:alnum:]]/', '', $this
      ->get($key, $default, $deep));
  }

  /**
   * Returns the digits of the parameter value.
   *
   * @param string  $key     The parameter key
   * @param mixed   $default The default value if the parameter key does not exist
   * @param boolean $deep    If true, a path like foo[bar] will find deeper items
   *
   * @return string The filtered value
   *
   * @api
   */
  public function getDigits($key, $default = '', $deep = false) {

    // we need to remove - and + because they're allowed in the filter
    return str_replace(array(
      '-',
      '+',
    ), '', $this
      ->filter($key, $default, $deep, FILTER_SANITIZE_NUMBER_INT));
  }

  /**
   * Returns the parameter value converted to integer.
   *
   * @param string  $key     The parameter key
   * @param mixed   $default The default value if the parameter key does not exist
   * @param boolean $deep    If true, a path like foo[bar] will find deeper items
   *
   * @return integer The filtered value
   *
   * @api
   */
  public function getInt($key, $default = 0, $deep = false) {
    return (int) $this
      ->get($key, $default, $deep);
  }

  /**
   * Filter key.
   *
   * @param string  $key     Key.
   * @param mixed   $default Default = null.
   * @param boolean $deep    Default = false.
   * @param integer $filter  FILTER_* constant.
   * @param mixed   $options Filter options.
   *
   * @see http://php.net/manual/en/function.filter-var.php
   *
   * @return mixed
   */
  public function filter($key, $default = null, $deep = false, $filter = FILTER_DEFAULT, $options = array()) {
    $value = $this
      ->get($key, $default, $deep);

    // Always turn $options into an array - this allows filter_var option shortcuts.
    if (!is_array($options) && $options) {
      $options = array(
        'flags' => $options,
      );
    }

    // Add a convenience check for arrays.
    if (is_array($value) && !isset($options['flags'])) {
      $options['flags'] = FILTER_REQUIRE_ARRAY;
    }
    return filter_var($value, $filter, $options);
  }

  /**
   * Returns an iterator for parameters.
   *
   * @return \ArrayIterator An \ArrayIterator instance
   */
  public function getIterator() {
    return new \ArrayIterator($this->parameters);
  }

  /**
   * Returns the number of parameters.
   *
   * @return int The number of parameters
   */
  public function count() {
    return count($this->parameters);
  }

}