Public Access to Government Document Microforms.

Fuente: ERIC Institute of Education Sciences

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Bibliographic Details
Main Author:	Stratford, Juri
Format:	Recurso educativo Open Access
Language:	en
Published:	1988
Subjects:	Access to Information Government Publications Library Administration Library Collection Development Library Collections Library Services Microforms
Online Access:	Acceder al recurso
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_version_	1867180737284800512
author	Stratford, Juri
author_facet	Stratford, Juri Stratford, Juri
collection	Education Resources Information Center
contents	Public Access to Government Document Microforms. Stratford, Juri Access to Information Government Publications Library Administration Library Collection Development Library Collections Library Services Microforms Examines criteria for the coordination of the administration of government document microform collections, including discussion of bibliographic access, physical access, and collection development. Limitations to the integration of these collections and problems of public access to these less than fully integrated collections are also addressed. (nine references) (MES)
format	Recurso educativo Open Access
id	eric_EJ387539
institution	ERIC Institute of Education Sciences
language	en
publishDate	1988
record_format	eric
spellingShingle	Public Access to Government Document Microforms. Stratford, Juri Access to Information Government Publications Library Administration Library Collection Development Library Collections Library Services Microforms Public Access to Government Document Microforms. Stratford, Juri Access to Information Government Publications Library Administration Library Collection Development Library Collections Library Services Microforms Examines criteria for the coordination of the administration of government document microform collections, including discussion of bibliographic access, physical access, and collection development. Limitations to the integration of these collections and problems of public access to these less than fully integrated collections are also addressed. (nine references) (MES)
title	Public Access to Government Document Microforms.
topic	Access to Information Government Publications Library Administration Library Collection Development Library Collections Library Services Microforms
url	https://eric.ed.gov/?id=EJ387539

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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