mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
synced 2024-11-24 18:51:56 +01:00
74 lines
2.4 KiB
PHP
74 lines
2.4 KiB
PHP
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<?php
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$GLOBALS["sessions_db"] = "sessions.db";
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function erzeugeDB() {
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$db = new SQLite3($GLOBALS["sessions_db"]);
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$ergebnis = $db->query("CREATE TABLE sessiondaten (id VARCHAR(32) PRIMARY KEY, daten TEXT, zugriff VARCHAR(14))");
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$db->close();
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}
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function zeitstempel() {
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return date("YmdHis");
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}
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function _open($pfad, $name) {
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if (!file_exists($GLOBALS["sessions_db"])) {
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erzeugeDB();
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}
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$GLOBALS["sessions_id"] = new SQLite3($GLOBALS["sessions_db"]);
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return true;
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}
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function _close() {
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$GLOBALS["sessions_id"]->close();
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unset($GLOBALS["sessions_id"]);
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return true;
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}
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function _read($sessionid) {
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if (!isset($GLOBALS["sessions_id"])) {
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_open('', '');
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}
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$ergebnis = $GLOBALS["sessions_id"]->query("SELECT daten FROM sessiondaten WHERE id='$sessionid'");
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$zeile = $ergebnis->fetchArray();
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if ($zeile) {
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$wert = $zeile["daten"];
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$sessionid = $GLOBALS["sessions_id"]->escapeString($sessionid);
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$GLOBALS["sessions_id"]->query("UPDATE sessiondaten SET zugriff='" . zeitstempel() . "' WHERE id='$sessionid'");
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} else {
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$wert = "";
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}
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return $wert;
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}
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function _write($sessionid, $daten) {
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if (!isset($GLOBALS["sessions_id"])) {
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_open('', '');
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}
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$daten = $GLOBALS["sessions_id"]->escapeString($daten);
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$sessionid = $GLOBALS["sessions_id"]->escapeString($sessionid);
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$ergebnis = $GLOBALS["sessions_id"]->query("UPDATE sessiondaten SET daten='" . $daten . "', zugriff='" . zeitstempel() . "' WHERE id='$sessionid'");
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if ($GLOBALS["sessions_id"]->changes() == 0) {
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$GLOBALS["sessions_id"]->query("INSERT INTO sessiondaten (id, daten, zugriff) VALUES ('$sessionid', '" . $daten . "', '" . zeitstempel() . "')");
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}
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return true;
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}
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function _destroy($sessionid) {
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$sessionid = $GLOBALS["sessions_id"]->escapeString($sessionid);
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$GLOBALS["sessions_id"]->query("DELETE FROM sessiondaten WHERE id='$sessionid'");
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return true;
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}
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function _gc($lebensdauer) {
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$ablauf = time() - $lebensdauer;
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$ablauf_zeitstempel = date("YmdHis", $ablauf);
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$GLOBALS["sessions_id"]->query("DELETE FROM sessiondaten WHERE zugriff < '$ablauf_zeitstempel'");
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return true;
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}
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session_set_save_handler("_open", "_close", "_read", "_write", "_destroy", "_gc");
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register_shutdown_function("session_write_close");
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session_start();
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?>
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