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Bibliographic Details
Main Author:	Juan Diego Parra Valencia
Format:	Artículo científico
Language:	es
Published:	Universidad del Norte 2016
Subjects:	Filosofía actual técnica virtual Virtualidad ciberespacio
Online Access:	https://www.redalyc.org/articulo.oa?id=85445906011 https://www.redalyc.org/journal/854/85445906011/ https://www.redalyc.org/journal/854/85445906011/html/ https://www.redalyc.org/journal/854/85445906011/85445906011.epub https://www.redalyc.org/journal/854/85445906011/movil
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Virtualidad: persistencias e insistencias de un nuevo viejo problema Juan Diego Parra Valencia Filosofía actual técnica virtual Virtualidad ciberespacio Este ensayo buscará presentar el problema de la virtualidad desde una perspectiva filosófica, dialogante con las formas contemporáneas de aprehensión del término, en consonancia con los desarrollos tecnológicos y discursivos de la historia reciente. Se analizarán términos afines a la virtualidad, tales como “posibilidad”, “potencialidad”, “ficción”, “irrealidad”, “realidad” y “actualidad”, con el fin de caracterizar aquello que hoy se denomina “realidad virtual” y “ciberespacio”. 2016 artículo científico 1692-8857 https://www.redalyc.org/articulo.oa?id=85445906011 https://www.redalyc.org/journal/854/85445906011/ https://www.redalyc.org/journal/854/85445906011/html/ https://www.redalyc.org/journal/854/85445906011/85445906011.epub https://www.redalyc.org/journal/854/85445906011/movil es http://www.redalyc.org/revista.oa?id=854 Eidos: Revista de Filosofía de la Universidad del Norte application/pdf Universidad del Norte Eidos: Revista de Filosofía de la Universidad del Norte (Colombia) Num.25

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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