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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | function verbinden() { |
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| 4 | global $mysql_database, $mysql_server, $mysql_pass, $mysql_user; |
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| 5 | |||
| 4 | daniel-mar | 6 | if (!db_connect($mysql_server, $mysql_user, $mysql_pass)) { |
| 7 | die('<b>Verbindung zum MySQL-Server konnte nicht hergestellt werden! ('.db_error().')</b>'); |
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| 2 | daniel-mar | 8 | } |
| 9 | |||
| 4 | daniel-mar | 10 | if (!db_select_db($mysql_database)) { |
| 11 | die('<b>Verbindung zum MySQL-Server konnte nicht hergestellt werden! ('.db_error().')</b>'); |
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| 2 | daniel-mar | 12 | } |
| 13 | |||
| 14 | register_shutdown_function('trennen'); |
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| 4 | daniel-mar | 15 | db_select_db($mysql_database); |
| 2 | daniel-mar | 16 | } |
| 17 | |||
| 18 | function trennen() { |
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| 4 | daniel-mar | 19 | @db_close(); |
| 2 | daniel-mar | 20 | } |
| 21 | |||
| 4 | daniel-mar | 22 | // Liefert die Anzahl der Zeilen im Ergebnis |
| 23 | function db_num_rows($result) { |
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| 24 | if (!$result) { |
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| 25 | $err = db_error(); |
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| 26 | throw new Exception("Called db_num_rows() with an erroneous argument.".($err == '' ? '' : " Possible cause: $err")); |
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| 27 | } |
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| 28 | return $result->num_rows; |
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| 29 | } |
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| 30 | |||
| 31 | // Liefert eine Ergebniszeile als Objekt |
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| 32 | function db_fetch_object($result, $class_name="stdClass", $params=null) { |
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| 33 | if (!$result) { |
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| 34 | $err = db_error(); |
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| 35 | throw new Exception("Called db_fetch_object() with an erroneous argument.".($err == '' ? '' : " Possible cause: $err")); |
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| 36 | } |
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| 37 | if ($params) { |
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| 38 | return $result->fetch_object($class_name, $params); |
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| 39 | } else { |
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| 40 | return $result->fetch_object($class_name); |
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| 41 | } |
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| 42 | } |
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| 43 | |||
| 44 | // Öffnet eine Verbindung zu einem MySQL-Server |
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| 45 | function db_connect($server=null, $username=null, $password=null, $new_link=false, $client_flags=0) { |
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| 46 | global $vts_mysqli; |
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| 47 | $ary = explode(':', $server); |
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| 48 | $host = $ary[0]; |
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| 49 | $ini_port = ini_get("mysqli.default_port"); |
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| 50 | $port = isset($ary[1]) ? (int)$ary[1] : ($ini_port ? (int)$ini_port : 3306); |
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| 51 | if (is_null($server)) $port = ini_get("mysqli.default_host"); |
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| 52 | if (is_null($username)) $port = ini_get("mysqli.default_user"); |
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| 53 | if (is_null($password)) $port = ini_get("mysqli.default_password"); |
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| 54 | $vts_mysqli = new mysqli($host, $username, $password, /*dbname*/'', $port, ini_get("mysqli.default_socket")); |
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| 55 | return (empty($vts_mysqli->connect_error) && ($vts_mysqli->connect_errno == 0)) ? $vts_mysqli : false; |
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| 56 | } |
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| 57 | |||
| 58 | // Schließt eine Verbindung zu MySQL |
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| 59 | function db_close($link_identifier=NULL) { |
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| 60 | global $vts_mysqli; |
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| 61 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 62 | if (is_null($li)) throw new Exception("Cannot execute db_close(). No valid connection to server."); |
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| 63 | |||
| 64 | return $li->close(); |
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| 65 | } |
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| 66 | |||
| 67 | // Liefert den Fehlertext der zuvor ausgeführten MySQL Operation |
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| 68 | function db_error($link_identifier=NULL) { |
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| 69 | global $vts_mysqli; |
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| 70 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 71 | if (is_null($li)) throw new Exception("Cannot execute db_error(). No valid connection to server."); |
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| 72 | |||
| 73 | return !empty($li->connect_error) ? $li->connect_error : $li->error; |
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| 74 | } |
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| 75 | |||
| 76 | // Maskiert spezielle Zeichen innerhalb eines Strings für die Verwendung in einer SQL-Anweisung |
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| 77 | function db_real_escape_string($unescaped_string, $link_identifier=NULL) { |
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| 78 | global $vts_mysqli; |
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| 79 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 80 | if (is_null($li)) throw new Exception("Cannot execute db_real_escape_string(). No valid connection to server."); |
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| 81 | |||
| 82 | return $li->escape_string($unescaped_string); |
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| 83 | } |
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| 84 | |||
| 85 | // Sendet eine Anfrage an MySQL |
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| 86 | function db_query($query, $link_identifier=NULL) { |
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| 87 | global $vts_mysqli; |
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| 88 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 89 | if (is_null($li)) throw new Exception("Cannot execute db_query(). No valid connection to server."); |
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| 90 | |||
| 91 | return $li->query($query, $resultmode=MYSQLI_STORE_RESULT); |
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| 92 | } |
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| 93 | |||
| 94 | // Auswahl einer MySQL Datenbank |
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| 95 | function db_select_db($database_name, $link_identifier=NULL) { |
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| 96 | global $vts_mysqli; |
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| 97 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 98 | if (is_null($li)) throw new Exception("Cannot execute db_select_db(). No valid connection to server."); |
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| 99 | |||
| 100 | return $li->select_db($database_name); |
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| 101 | } |
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| 102 | |||
| 103 | // Liefert die ID, die in der vorherigen Abfrage erzeugt wurde |
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| 104 | function db_insert_id($link_identifier=NULL) { |
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| 105 | global $vts_mysqli; |
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| 106 | $li = is_null($link_identifier) ? $vts_mysqli : $link_identifier; |
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| 107 | if (is_null($li)) throw new Exception("Cannot execute db_insert_id(). No valid connection to server."); |
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| 108 | |||
| 109 | return $li->insert_id; |
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| 110 | } |