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mysqli::rollbackmysqli_rollback
137
Rolls back current transaction
Description
Object oriented style
bool mysqli::rollback(
int flags,
string name);
Procedural style
bool mysqli_rollback(
mysqli link,
int flags,
string name);
Rollbacks the current transaction for the database.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
flags
A bitmask of MYSQLI_TRANS_COR_* constants.
name
If provided then ROLLBACK/*name*/ is executed.
Return Values
Returns TRUE on success or FALSE on failure.
Changelog
Version
Description
5.5.0
Added flags and name parameters.
Examples
Example 3.66 mysqli::rollback example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* disable autocommit */
$mysqli->autocommit(FALSE);
$mysqli->query("CREATE TABLE myCity LIKE City");
$mysqli->query("ALTER TABLE myCity Type=InnoDB");
$mysqli->query("INSERT INTO myCity SELECT * FROM City LIMIT 50");
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mysqli::rollbackmysqli_rollback
138
/* commit insert */
$mysqli->commit();
/* delete all rows */
$mysqli->query("DELETE FROM myCity");
if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
$row = $result->fetch_row();
printf("%d rows in table myCity.\n", $row[0]);
/* Free result */
$result->close();
}
/* Rollback */
$mysqli->rollback();
if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
$row = $result->fetch_row();
printf("%d rows in table myCity (after rollback).\n", $row[0]);
/* Free result */
$result->close();
}
/* Drop table myCity */
$mysqli->query("DROP TABLE myCity");
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* disable autocommit */
mysqli_autocommit($link, FALSE);
mysqli_query($link, "CREATE TABLE myCity LIKE City");
mysqli_query($link, "ALTER TABLE myCity Type=InnoDB");
mysqli_query($link, "INSERT INTO myCity SELECT * FROM City LIMIT 50");
/* commit insert */
mysqli_commit($link);
/* delete all rows */
mysqli_query($link, "DELETE FROM myCity");
if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
$row = mysqli_fetch_row($result);
printf("%d rows in table myCity.\n", $row[0]);
/* Free result */
mysqli_free_result($result);
}
/* Rollback */
mysqli_rollback($link);
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mysqli::rpl_query_typemysqli_rpl_query_type
139
if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
$row = mysqli_fetch_row($result);
printf("%d rows in table myCity (after rollback).\n", $row[0]);
/* Free result */
mysqli_free_result($result);
}
/* Drop table myCity */
mysqli_query($link, "DROP TABLE myCity");
mysqli_close($link);
?>
The above examples will output:
0 rows in table myCity.
50 rows in table myCity (after rollback).
See Also
mysqli_begin_transaction
mysqli_commit
mysqli_autocommit
mysqli_release_savepoint
3.9.48 mysqli::rpl_query_typemysqli_rpl_query_type
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::rpl_query_type
mysqli_rpl_query_type
Returns RPL query type
Description
Object oriented style
int mysqli::rpl_query_type(
string query);
Procedural style
int mysqli_rpl_query_type(
mysqli link,
string query);
Returns MYSQLI_RPL_MASTER, MYSQLI_RPL_SLAVE or MYSQLI_RPL_ADMIN depending on a query
type. INSERTUPDATE and similar are master queries, SELECT is slave, and FLUSH, REPAIR and similar
are admin.
Warning
This function is currently not documented; only its argument list is available.
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mysqli::savepointmysqli_savepoint
140
Warning
This function has been DEPRECATED and REMOVED as of PHP 5.3.0.
3.9.49 mysqli::savepointmysqli_savepoint
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::savepoint
mysqli_savepoint
Set a named transaction savepoint
Description
Object oriented style (method):
public bool mysqli::savepoint(
string name);
Procedural style:
bool mysqli_savepoint(
mysqli link,
string name);
Warning
This function is currently not documented; only its argument list is available.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
name
Return Values
Returns TRUE on success or FALSE on failure.
See Also
mysqli_commit
3.9.50 mysqli::select_dbmysqli_select_db
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::select_db
mysqli_select_db
Selects the default database for database queries
Description
Object oriented style
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mysqli::select_dbmysqli_select_db
141
bool mysqli::select_db(
string dbname);
Procedural style
bool mysqli_select_db(
mysqli link,
string dbname);
Selects the default database to be used when performing queries against the database connection.
Note
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.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
dbname
The database name.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example 3.67 mysqli::select_db example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* return name of current default database */
if ($result = $mysqli->query("SELECT DATABASE()")) {
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
$result->close();
}
/* change db to world db */
$mysqli->select_db("world");
/* return name of current default database */
if ($result = $mysqli->query("SELECT DATABASE()")) {
$row = $result->fetch_row();
printf("Default database is %s.\n", $row[0]);
$result->close();
}
$mysqli->close();
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mysqli::send_querymysqli_send_query
142
?>
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "test");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
/* return name of current default database */
if ($result = mysqli_query($link, "SELECT DATABASE()")) {
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
mysqli_free_result($result);
}
/* change db to world db */
mysqli_select_db($link, "world");
/* return name of current default database */
if ($result = mysqli_query($link, "SELECT DATABASE()")) {
$row = mysqli_fetch_row($result);
printf("Default database is %s.\n", $row[0]);
mysqli_free_result($result);
}
mysqli_close($link);
?>
The above examples will output:
Default database is test.
Default database is world.
See Also
mysqli_connect
mysqli_real_connect
3.9.51 mysqli::send_querymysqli_send_query
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::send_query
mysqli_send_query
Send the query and return
Description
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mysqli::set_charsetmysqli_set_charset
143
Object oriented style
bool mysqli::send_query(
string query);
Procedural style
bool mysqli_send_query(
mysqli link,
string query);
Warning
This function is currently not documented; only its argument list is available.
Warning
This function has been DEPRECATED and REMOVED as of PHP 5.3.0.
3.9.52 mysqli::set_charsetmysqli_set_charset
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::set_charset
mysqli_set_charset
Sets the default client character set
Description
Object oriented style
bool mysqli::set_charset(
string charset);
Procedural style
bool mysqli_set_charset(
mysqli link,
string charset);
Sets the default character set to be used when sending data from and to the database server.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
charset
The charset to be set as default.
Return Values
Returns TRUE on success or FALSE on failure.
Notes
Note
To use this function on a Windows platform you need MySQL client library version
4.1.11 or above (for MySQL 5.0 you need 5.0.6 or above).
mysqli::set_charsetmysqli_set_charset
144
Note
This is the preferred way to change the charset. Using mysqli_query to set it
(such as SET NAMES utf8) is not recommended. See the MySQL character set
concepts section for more information.
Examples
Example 3.68 mysqli::set_charset example
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
printf("Initial character set: %s\n", $mysqli->character_set_name());
/* change character set to utf8 */
if (!$mysqli->set_charset("utf8")) {
printf("Error loading character set utf8: %s\n", $mysqli->error);
exit();
} else {
printf("Current character set: %s\n", $mysqli->character_set_name());
}
$mysqli->close();
?>
Procedural style
<?php
$link = mysqli_connect('localhost', 'my_user', 'my_password', 'test');
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
printf("Initial character set: %s\n", mysqli_character_set_name($link));
/* change character set to utf8 */
if (!mysqli_set_charset($link, "utf8")) {
printf("Error loading character set utf8: %s\n", mysqli_error($link));
exit();
} else {
printf("Current character set: %s\n", mysqli_character_set_name($link));
}
mysqli_close($link);
?>
mysqli::set_local_infile_defaultmysqli_set_local_infile_default
145
The above examples will output something similar to:
Initial character set: latin1
Current character set: utf8
See Also
mysqli_character_set_name
mysqli_real_escape_string
MySQL character set concepts
List of character sets that MySQL supports
3.9.53 mysqli::set_local_infile_default,
mysqli_set_local_infile_default
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::set_local_infile_default
mysqli_set_local_infile_default
Unsets user defined handler for load local infile command
Description
void mysqli_set_local_infile_default(
mysqli link);
Deactivates a LOAD DATA INFILE LOCAL handler previously set with
mysqli_set_local_infile_handler.
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
Return Values
No value is returned.
Examples
See mysqli_set_local_infile_handler examples
See Also
mysqli_set_local_infile_handler
3.9.54 mysqli::set_local_infile_handler,
mysqli_set_local_infile_handler
Copyright 1997-2014 the PHP Documentation Group.
• mysqli::set_local_infile_handler
mysqli::set_local_infile_handlermysqli_set_local_infile_handler
146
mysqli_set_local_infile_handler
Set callback function for LOAD DATA LOCAL INFILE command
Description
Object oriented style
bool mysqli::set_local_infile_handler(
mysqli link,
callable read_func);
Procedural style
bool mysqli_set_local_infile_handler(
mysqli link,
callable read_func);
Set callback function for LOAD DATA LOCAL INFILE command
The callbacks task is to read input from the file specified in the LOAD DATA LOCAL INFILE and to
reformat it into the format understood by LOAD DATA INFILE.
The returned data needs to match the format specified in the LOAD DATA
Parameters
link
Procedural style only: A link identifier returned by mysqli_connect or
mysqli_init
read_func
A callback function or object method taking the following parameters:
stream
A PHP stream associated with the
SQL commands INFILE
&buffer
A string buffer to store the rewritten
input into
buflen
The maximum number of characters
to be stored in the buffer
&errormsg
If an error occurs you can store an
error message in here
The callback function should return the number of characters stored in the buffer or a negative value if
an error occurred.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example 3.69 mysqli::set_local_infile_handler example
Object oriented style
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