gistfile1.php

<?php

/**
 *  This class is an experiment for the job of handling errors.
 */
class error_context
{
	/**
	 * Holds the unique identifier of the error (a name).
	 *
	 * @var string
	 */
	private $_name = null;

	/**
	 * An array that holds all the errors occurred separated by severity.
	 *
	 * @var array
	 */
	private $_errors = null;

	/**
	 * The default severity code.
	 *
	 * @var mixed
	 */
	private $_default_severity = 0;

	/**
	 * A list of all severity code from the less important to the most serious.
	 *
	 * @var array/mixed
	 */
	private $_severity_levels = array(0);

	/**
	 * Certain errors may need some specific language file...
	 *
	 * @var array
	 */
	private $_language_files = array();

	/**
	 * Multipleton. This is an array of instances of error_context.
	 * All callers use an error context ('post', 'attach', or 'default' if none chosen).
	 *
	 * @var array of error_context
	 */
	private static $_contexts = null;

	/**
	 * Initialize the class
	 *
	 * @param string error identifier
	 * @param array/mixed a list of all severity code from the less important to the most serious
	 * @param mixed the default error severity code
	 */
	private function __construct ($id, $severity_levels, $default_severity)
	{
		if (!empty($id))
			$this->_name = $id;

		if (!empty($severity_levels))
			$this->_severity_levels = $severity_levels;

		if (!empty($default_severity))
			$this->_default_severity = $default_severity;
		else
			$this->_default_severity = array_shift(array_values($this->_severity_levels));
	}

// ...

	public static function context($id = 'default')
	{
		if (self::$_contexts === null)
			self::$_contexts = array();
		if (!array_key_exists($id, self::$_contexts))
  		self::$_contexts[$id] = new error_context($id);

		return self::$_contexts[$id];
	}
}