Schon mal in's PHP-Handbuch geschaut? ...
Beispiel 1. mysql_select_db() example
1 | <?php
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2 |
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3 | $link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
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4 | if (!$link) {
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5 | die('Verbindung nicht möglich : ' . mysql_error());
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6 | }
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7 |
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8 | // benutze Datenbank foo
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9 | $db_selected = mysql_select_db('foo', $link);
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10 | if (!$db_selected) {
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11 | die ('Kann foo nicht benutzen : ' . mysql_error());
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12 | }
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13 | ?>
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Alternativ auch mit mysqli-funktionen:
Beispiel 1. Object oriented style
1 | <?php
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2 | $mysqli = new mysqli("localhost", "my_user", "my_password", "test");
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3 |
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4 | /* check connection */
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5 | if (mysqli_connect_errno()) {
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6 | printf("Connect failed: %s\n", mysqli_connect_error());
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7 | exit();
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8 | }
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9 |
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10 | /* return name of current default database */
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11 | if ($result = $mysqli->query("SELECT DATABASE()")) {
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12 | $row = $result->fetch_row();
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13 | printf("Default database is %s.\n", $row[0]);
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14 | $result->close();
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15 | }
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16 |
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17 | /* change db to world db */
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18 | $mysqli->select_db("world");
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19 |
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20 | /* return name of current default database */
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21 | if ($result = $mysqli->query("SELECT DATABASE()")) {
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22 | $row = $result->fetch_row();
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23 | printf("Default database is %s.\n", $row[0]);
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24 | $result->close();
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25 | }
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26 |
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27 | $mysqli->close();
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28 | ?>
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Beispiel 2. Procedural style
1 | <?php
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2 | $link = mysqli_connect("localhost", "my_user", "my_password", "test");
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3 |
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4 | /* check connection */
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5 | if (mysqli_connect_errno()) {
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6 | printf("Connect failed: %s\n", mysqli_connect_error());
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7 | exit();
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8 | }
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9 |
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10 | /* return name of current default database */
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11 | if ($result = mysqli_query($link, "SELECT DATABASE()")) {
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12 | $row = mysqli_fetch_row($result);
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13 | printf("Default database is %s.\n", $row[0]);
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14 | mysqli_free_result($result);
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15 | }
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16 |
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17 | /* change db to world db */
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18 | mysqli_select_db($link, "world");
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19 |
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20 | /* return name of current default database */
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21 | if ($result = mysqli_query($link, "SELECT DATABASE()")) {
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22 | $row = mysqli_fetch_row($result);
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23 | printf("Default database is %s.\n", $row[0]);
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24 | mysqli_free_result($result);
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25 | }
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26 |
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27 | mysqli_close($link);
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28 | ?>
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Anmerkung: This function should only be used to change the default
database for the connection. You can select the default database with
4th parameter in mysqli_connect().
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