oci_password_change(3) [php man page]
OCI_PASSWORD_CHANGE(3) OCI_PASSWORD_CHANGE(3) oci_password_change - Changes password of Oracle's user SYNOPSIS
bool oci_password_change (resource $connection, string $username, string $old_password, string $new_password) DESCRIPTION
resource oci_password_change (string $dbname, string $username, string $old_password, string $new_password) Changes password for user with $username. The oci_password_change(3) function is most useful for PHP command-line scripts, or when non-persistent connections are used throughout the PHP application. PARAMETERS
o $connection - An Oracle connection identifier, returned by oci_connect(3) or oci_pconnect(3). o $username - The Oracle user name. o $old_password - The old password. o $new_password - The new password to be set. o $dbname - The database name. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 oci_password_change(3) example changing the password of an already connected user <?php $dbase = 'localhost/orcl'; $user = 'cj'; $current_pw = 'welcome'; $new_pw = 'geelong'; $c = oci_pconnect($user, $current_pw, $dbase); oci_password_change($c, $user, $current_pw, $new_pw); echo "New password is : " . $new_pw . " "; ?> Example #2 oci_password_change(3) example of connecting and changing the password in one step <?php $dbase = 'localhost/orcl'; $user = 'cj'; $current_pw = 'welcome'; $new_pw = 'geelong'; $c = oci_pconnect($user, $current_pw, $dbase); if (!$c) { $m = oci_error(); if ($m['code'] == 28001) { // "ORA-28001: the password has expired" // Login and reset password at the same time $c = oci_password_change($dbase, $user, $current_pw, $new_pw); if ($c) { echo "New password is : " . $new_pw . " "; } } } if (!$c) { // The original error wasn't 28001, or the password change failed $m = oci_error(); trigger_error('Could not connect to database: '. $m['message'], E_USER_ERROR); } // Use the connection $c ?> NOTES
Note Changing the password either with this function or directly in Oracle should be done carefully. This is because PHP applications may continue to successfully reuse persistent connections by authenticating with the old password. The best practice is to restart all web servers whenever the user password is changed. Note If upgrading the Oracle client libraries or the database from a release prior to 11.2.0.3 to version 11.2.0.3 or higher, oci_pass- word_change(3) may give the error "ORA-1017: invalid username/password" unless both client and server versions are upgraded at the same time. Note The second oci_password_change(3) syntax is available since OCI8 version 1.1. Note In PHP versions before 5.0.0 you must use ocipasswordchange(3) instead. This name still can be used, it was left as alias of oci_password_change(3) for downwards compatability. This, however, is deprecated and not recommended. PHP Documentation Group OCI_PASSWORD_CHANGE(3)
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OCI_CONNECT(3) OCI_CONNECT(3) oci_connect - Connect to an Oracle database SYNOPSIS
resource oci_connect (string $username, string $password, [string $connection_string], [string $character_set], [int $session_mode]) DESCRIPTION
Returns a connection identifier needed for most other OCI8 operations. See Connection Handling for general information on connection management and connection pooling. From PHP 5.1.2 (PECL OCI8 1.1) oci_close(3) can be used to close the connection. The second and subsequent calls to oci_connect(3) with the same parameters will return the connection handle returned from the first call. This means that transactions in one handle are also in the other handles, because they use the same underlying database connection. If two handles need to be transactionally isolated from each other, use oci_new_connect(3) instead. PARAMETERS
o $username - The Oracle user name. o $password - The password for $username. o $connection_string -Contains the Oracle instance to connect to. It can be an Easy Connect string, or a Connect Name from the tnsnames.ora file, or the name of a local Oracle instance. If not specified, PHP uses environment variables such as TWO_TASK (on Linux) or LOCAL (on Windows) and ORACLE_SID to determine the Oracle instance to connect to. To use the Easy Connect naming method, PHP must be linked with Oracle 10 g or greater Client libraries. The Easy Connect string for Oracle 10 g is of the form: [//]host_name[:port][/ser- vice_name]. From Oracle 11 g, the syntax is: [//]host_name[:port][/service_name][:server_type][/instance_name]. Service names can be found by running the Oracle utility lsnrctl status on the database server machine. The tnsnames.ora file can be in the Oracle Net search path, which includes $ORACLE_HOME/network/admin and /etc. Alternatively set TNS_ADMIN so that $TNS_ADMIN/tnsnames.ora is read. Make sure the web daemon has read access to the file. o $character_set -Determines the character set used by the Oracle Client libraries. The character set does not need to match the character set used by the database. If it doesn't match, Oracle will do its best to convert data to and from the database character set. Depending on the character sets this may not give usable results. Conversion also adds some time overhead. If not specified, the Oracle Client libraries determine a character set from the NLS_LANG environment variable. Passing this parameter can reduce the time taken to connect. o $session_mode -This parameter is available since version PHP 5 (PECL OCI8 1.1) and accepts the following values: OCI_DEFAULT, OCI_SYSOPER and OCI_SYSDBA. If either OCI_SYSOPER or OCI_SYSDBA were specified, this function will try to establish privileged connection using external credentials. Privileged connections are disabled by default. To enable them you need to set oci8.privileged_connect to On. PHP 5.3 (PECL OCI8 1.3.4) introduced the OCI_CRED_EXT mode value. This tells Oracle to use External or OS authentication, which must be configured in the database. The OCI_CRED_EXT flag can only be used with username of "/" and a empty password. oci8.privileged_connect may be On or Off. OCI_CRED_EXT may be combined with the OCI_SYSOPER or OCI_SYSDBA modes. OCI_CRED_EXT is not supported on Windows for security reasons. RETURN VALUES
Returns a connection identifier or FALSE on error. EXAMPLES
Example #1 Basic oci_connect(3) using Easy Connect syntax <?php // Connects to the XE service (i.e. database) on the "localhost" machine $conn = oci_connect('hr', 'welcome', 'localhost/XE'); if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR); } $stid = oci_parse($conn, 'SELECT * FROM employees'); oci_execute($stid); echo "<table border='1'> "; while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) { echo "<tr> "; foreach ($row as $item) { echo " <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : " ") . "</td> "; } echo "</tr> "; } echo "</table> "; ?> Example #2 Basic oci_connect(3) using a Network Connect name <?php // Connects to the MYDB database described in tnsnames.ora file, // One example tnsnames.ora entry for MYDB could be: // MYDB = // (DESCRIPTION = // (ADDRESS = (PROTOCOL = TCP)(HOST = mymachine.oracle.com)(PORT = 1521)) // (CONNECT_DATA = // (SERVER = DEDICATED) // (SERVICE_NAME = XE) // ) // ) $conn = oci_connect('hr', 'welcome', 'MYDB'); if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR); } $stid = oci_parse($conn, 'SELECT * FROM employees'); oci_execute($stid); echo "<table border='1'> "; while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) { echo "<tr> "; foreach ($row as $item) { echo " <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : " ") . "</td> "; } echo "</tr> "; } echo "</table> "; ?> Example #3 oci_connect(3) with an explicit character set <?php $conn = oci_connect('hr', 'welcome', 'localhost/XE', 'AL32UTF8'); if (!$conn) { $e = oci_error(); trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR); } $stid = oci_parse($conn, 'SELECT * FROM employees'); oci_execute($stid); echo "<table border='1'> "; while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) { echo "<tr> "; foreach ($row as $item) { echo " <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : " ") . "</td> "; } echo "</tr> "; } echo "</table> "; ?> Example #4 Using multiple calls to oci_connect(3) <?php $c1 = oci_connect("hr", "welcome", 'localhost/XE'); $c2 = oci_connect("hr", "welcome", 'localhost/XE'); // Both $c1 and $c2 show the same PHP resource id meaning they use the // same underlying database connection echo "c1 is $c1<br> "; echo "c2 is $c2<br> "; function create_table($conn) { $stmt = oci_parse($conn, "create table hallo (test varchar2(64))"); oci_execute($stmt); echo "Created table<br> "; } function drop_table($conn) { $stmt = oci_parse($conn, "drop table hallo"); oci_execute($stmt); echo "Dropped table<br> "; } function insert_data($connname, $conn) { $stmt = oci_parse($conn, "insert into hallo values(to_char(sysdate,'DD-MON-YY HH24:MI:SS'))"); oci_execute($stmt, OCI_DEFAULT); echo "$connname inserted row without committing<br> "; } function rollback($connname, $conn) { oci_rollback($conn); echo "$connname rollback<br> "; } function select_data($connname, $conn) { $stmt = oci_parse($conn, "select * from hallo"); oci_execute($stmt, OCI_DEFAULT); echo "$connname ----selecting<br> "; while (oci_fetch($stmt)) { echo " " . oci_result($stmt, "TEST") . "<br> "; } echo "$connname ----done<br> "; } create_table($c1); insert_data('c1', $c1); // Insert a row using c1 sleep(2); // sleep to show a different timestamp for the 2nd row insert_data('c2', $c2); // Insert a row using c2 select_data('c1', $c1); // Results of both inserts are returned select_data('c2', $c2); // Results of both inserts are returned rollback('c1', $c1); // Rollback using c1 select_data('c1', $c1); // Both inserts have been rolled back select_data('c2', $c2); drop_table($c1); // Closing one of the connections makes the PHP variable unusable, but // the other could be used oci_close($c1); echo "c1 is $c1<br> "; echo "c2 is $c2<br> "; // Output is: // c1 is Resource id #5 // c2 is Resource id #5 // Created table // c1 inserted row without committing // c2 inserted row without committing // c1 ----selecting // 09-DEC-09 12:14:43 // 09-DEC-09 12:14:45 // c1 ----done // c2 ----selecting // 09-DEC-09 12:14:43 // 09-DEC-09 12:14:45 // c2 ----done // c1 rollback // c1 ----selecting // c1 ----done // c2 ----selecting // c2 ----done // Dropped table // c1 is // c2 is Resource id #5 ?> NOTES
Note An incorrectly installed or configured OCI8 extension will often manifest itself as a connection problem or error. See Installing/Configuring for troubleshooting information. SEE ALSO
oci_pconnect(3), oci_new_connect(3), oci_close(3). PHP Documentation Group OCI_CONNECT(3)