ThinkPHP/Library/Vendor/Boris/Boris.php

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<?php

/* vim: set shiftwidth=2 expandtab softtabstop=2: */

namespace Boris;

/**
 * Boris is a tiny REPL for PHP.
 */
class Boris {
  const VERSION = "1.0.8";

  private $_prompt;
  private $_historyFile;
  private $_exports = array();
  private $_startHooks = array();
  private $_failureHooks = array();
  private $_inspector;

  /**
   * Create a new REPL, which consists of an evaluation worker and a readline client.
   *
   * @param string $prompt, optional
   * @param string $historyFile, optional
   */
  public function __construct($prompt = 'boris> ', $historyFile = null) {
    $this->setPrompt($prompt);
    $this->_historyFile = $historyFile
      ? $historyFile
      : sprintf('%s/.boris_history', getenv('HOME'))
      ;
    $this->_inspector = new ColoredInspector();
  }

  /**
   * Add a new hook to run in the context of the REPL when it starts.
   *
   * @param mixed $hook
   *
   * The hook is either a string of PHP code to eval(), or a Closure accepting
   * the EvalWorker object as its first argument and the array of defined
   * local variables in the second argument.
   *
   * If the hook is a callback and needs to set any local variables in the
   * REPL's scope, it should invoke $worker->setLocal($var_name, $value) to
   * do so.
   *
   * Hooks are guaranteed to run in the order they were added and the state
   * set by each hook is available to the next hook (either through global
   * resources, such as classes and interfaces, or through the 2nd parameter
   * of the callback, if any local variables were set.
   *
   * @example Contrived example where one hook sets the date and another
   *          prints it in the REPL.
   *
   *   $boris->onStart(function($worker, $vars){
   *     $worker->setLocal('date', date('Y-m-d'));
   *   });
   *
   *   $boris->onStart('echo "The date is $date\n";');