PDO_INFORMIX DSN
The SSL options are silently ignored in PHP 5.3.8, see https://bugs.php.net/bug.php?id=55870
Looks like it's addressed upstream, I just want to save others the hour and a half I just wasted :)
MySQL Functions (PDO_MYSQL)
Introduction
PDO_MYSQL is a driver that implements the PHP Data Objects (PDO) interface to enable access from PHP to MySQL 3.x, 4.x and 5.x databases.
PDO_MYSQL will take advantage of native prepared statement support present in MySQL 4.1 and higher. If you're using an older version of the mysql client libraries, PDO will emulate them for you.
Warning
Beware: Some MySQL table types (storage engines) do not support transactions. When writing transactional database code using a table type that does not support transactions, MySQL will pretend that a transaction was initiated successfully. In addition, any DDL queries issued will implicitly commit any pending transactions.
Installation
Use --with-pdo-mysql[=DIR] to install the PDO MySQL extension, where the optional [=DIR] is the MySQL base install directory. If mysqlnd is passed as [=DIR], then the MySQL native driver will be used.
Optionally, the --with-mysql-sock[=DIR] sets to location to the MySQL unix socket pointer for all MySQL extensions, including PDO_MYSQL. If unspecified, the default locations are searched.
Optionally, the --with-zlib-dir[=DIR] is used to set the path to the libz install prefix.
$ ./configure --with-pdo-mysql --with-mysql-sock=/var/mysql/mysql.sock
SSL support is enabled using the appropriate PDO_MySQL constants, which is equivalent to calling the » MySQL C API function mysql_ssl_set(). Also, SSL cannot be enabled with PDO::setAttribute because the connection already exists. See also the MySQL documentation about » connecting to MySQL with SSL.
| Version | Description |
|---|---|
| 5.4.0 | MySQL client libraries 4.1 and below are no longer supported. |
| 5.3.9 | Added SSL support with mysqlnd and OpenSSL. |
| 5.3.7 | Added SSL support with libmysql and OpenSSL. |
Predefined Constants
The constants below are defined by
this driver, and will only be available when the extension has been either
compiled into PHP or dynamically loaded at runtime. In addition, these
driver-specific constants should only be used if you are using this driver.
Using driver-specific attributes with another driver may result in
unexpected behaviour. PDO::getAttribute() may be used to
obtain the PDO_ATTR_DRIVER_NAME attribute to check the
driver, if your code can run against multiple drivers.
-
PDO::MYSQL_ATTR_USE_BUFFERED_QUERY(integer) -
If this attribute is set to
TRUEon a PDOStatement, the MySQL driver will use the buffered versions of the MySQL API. If you're writing portable code, you should use PDOStatement::fetchAll() instead.Example #1 Forcing queries to be buffered in mysql
<?php
if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
$stmt = $db->prepare('select * from foo',
array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
} else {
die("my application only works with mysql; I should use \$stmt->fetchAll() instead");
}
?> -
PDO::MYSQL_ATTR_LOCAL_INFILE(integer) -
Enable LOAD LOCAL INFILE.
Note, this constant can only be used in the
driver_optionsarray when constructing a new database handle. -
PDO::MYSQL_ATTR_INIT_COMMAND(integer) -
Command to execute when connecting to the MySQL server. Will automatically be re-executed when reconnecting.
Note, this constant can only be used in the
driver_optionsarray when constructing a new database handle. -
PDO::MYSQL_ATTR_READ_DEFAULT_FILE(integer) -
Read options from the named option file instead of from my.cnf. This option is not available if mysqlnd is used, because mysqlnd does not read the mysql configuration files.
-
PDO::MYSQL_ATTR_READ_DEFAULT_GROUP(integer) -
Read options from the named group from my.cnf or the file specified with
MYSQL_READ_DEFAULT_FILE. This option is not available if mysqlnd is used, because mysqlnd does not read the mysql configuration files. -
PDO::MYSQL_ATTR_MAX_BUFFER_SIZE(integer) -
Maximum buffer size. Defaults to 1 MiB. This constant is not supported when compiled against mysqlnd.
-
PDO::MYSQL_ATTR_DIRECT_QUERY(integer) -
Perform direct queries, don't use prepared statements.
-
PDO::MYSQL_ATTR_FOUND_ROWS(integer) -
Return the number of found (matched) rows, not the number of changed rows.
-
PDO::MYSQL_ATTR_IGNORE_SPACE(integer) -
Permit spaces after function names. Makes all functions names reserved words.
-
PDO::MYSQL_ATTR_COMPRESS(integer) -
Enable network communication compression. This is not supported when compiled against mysqlnd.
-
PDO::MYSQL_ATTR_SSL_CA(integer) -
The file path to the SSL certificate authority.
This exists as of PHP 5.3.7.
-
PDO::MYSQL_ATTR_SSL_CAPATH(integer) -
The file path to the directory that contains the trusted SSL CA certificates, which are stored in PEM format.
This exists as of PHP 5.3.7.
-
PDO::MYSQL_ATTR_SSL_CERT(integer) -
The file path to the SSL certificate.
This exists as of PHP 5.3.7.
-
PDO::MYSQL_ATTR_CIPHER(integer) -
A list of one or more permissible ciphers to use for SSL encryption, in a format understood by OpenSSL. For example: DHE-RSA-AES256-SHA:AES128-SHA
This exists as of PHP 5.3.7.
-
PDO::MYSQL_ATTR_KEY(integer) -
The file path to the SSL key.
This exists as of PHP 5.3.7.
Runtime Configuration
The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable |
|---|---|---|
| pdo_mysql.default_socket | "/tmp/mysql.sock" | PHP_INI_SYSTEM |
| pdo_mysql.debug | NULL | PHP_INI_SYSTEM |
Here's a short explanation of the configuration directives.
-
pdo_mysql.default_socketstring -
Sets a Unix domain socket. This value can either be set at compile time if a domain socket is found at configure. This ini setting is Unix only.
-
pdo_mysql.debugboolean -
Enables debugging for PDO_MYSQL. This setting is only available when PDO_MYSQL is compiled against mysqlnd and in PDO debug mode.
Table of Contents
- PDO_MYSQL DSN — Connecting to MySQL databases
add a note
User Contributed Notes
MySQL (PDO)
david at manifestwebdesign dot com
26-Oct-2011 08:22
curt at webmasterbond dot com
15-Apr-2011 11:54
Today's PHP snapshot now has SSL support for PDO. Follow the directions here ( http://dev.mysql.com/doc/refman/5.0/en/secure-create-certs.html ) to set up MySQL and then use the following connection options:
<?php
$pdo = new PDO(
'mysql:host=hostname;dbname=ssldb',
'username',
'password',
array(
PDO::MYSQL_ATTR_SSL_KEY =>'/path/to/client-key.pem',
PDO::MYSQL_ATTR_SSL_CERT=>'/path/to/client-cert.pem',
PDO::MYSQL_ATTR_SSL_CA =>'/path/to/ca-cert.pem'
)
);
?>
rgagnon24 at gmail dot com
01-Jun-2010 03:06
Note that the MySQL option PDO::MYSQL_ATTR_LOCAL_INFILE can only be set during the initial construction of your PDO object.
It is not supported by PDO::getAttribute() nor PDO::setAttribute() for MySQL PDO objects.
Davy Defaud
22-Apr-2009 06:30
This is the way to force mysql PDO driver to use UTF-8 for the connection :
<?php
$pdo = new PDO(
'mysql:host=hostname;dbname=defaultDbName',
'username',
'password',
array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")
);
?>
brian at diamondsea dot com
25-Jul-2008 05:26
SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. ...
After spending hours trying to track down why we were getting this error on a new server, after the same code ran fine on other servers, we found the problem to be an old MySQL _client_ library running on our web server, and a latest-version MySQL _server_ running on the database server's box.
Upgraded the MySQL client on the web server to the current revision and the problem went away.
miller_kurt_e at yahoo dot com
20-Jul-2008 08:03
SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. ...
This one can be a royal pain to deal with. Never stack statements to be executed in one go. Nobody ever mentions this possibility in all the posts I've seen dealing with this error.
This example is a Zend Framework example but the theory is the same.
As in:
<?php
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `ticket_hist` (
`tid` int(11) NOT NULL,
`trqform` varchar(40) NOT NULL,
`trsform` varchar(40) NOT NULL,
`tgen` datetime NOT NULL,
`tterm` datetime,
`tstatus` tinyint(1) NOT NULL
) ENGINE=ARCHIVE COMMENT='ticket archive';
CREATE TABLE IF NOT EXISTS `request_hist` (
`rqid` int(11) NOT NULL,
`rqtid` int(11) NOT NULL,
`rqsid` int(11) NOT NULL,
`rqdate` datetime NOT NULL,
`rqcode` tinyint(1) NOT NULL,
`rssid` int(11) NOT NULL,
`rsdate` datetime,
`rscode` tinyint(1)
) ENGINE=ARCHIVE COMMENT='request archive';
CREATE TABLE IF NOT EXISTS `relay_hist` (
`rqid` int(5) NOT NULL,
`sdesc` varchar(40) NOT NULL,
`rqemail` varchar(40) NOT NULL,
`sid` int(11) NOT NULL,
`rlsid` int(11) NOT NULL,
`dcode` varchar(5) NOT NULL
) ENGINE=ARCHIVE COMMENT='relay archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
?>
This will run fine but PDO will balk with the 'unbuffered' error if you follow this with another query.
Instead do:
<?php
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `ticket_hist` (
`tid` int(11) NOT NULL,
`trqform` varchar(40) NOT NULL,
`trsform` varchar(40) NOT NULL,
`tgen` datetime NOT NULL,
`tterm` datetime,
`tstatus` tinyint(1) NOT NULL
) ENGINE=ARCHIVE COMMENT='ticket archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `request_hist` (
`rqid` int(11) NOT NULL,
`rqtid` int(11) NOT NULL,
`rqsid` int(11) NOT NULL,
`rqdate` datetime NOT NULL,
`rqcode` tinyint(1) NOT NULL,
`rssid` int(11) NOT NULL,
`rsdate` datetime,
`rscode` tinyint(1)
) ENGINE=ARCHIVE COMMENT='request archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `relay_hist` (
`rqid` int(5) NOT NULL,
`sdesc` varchar(40) NOT NULL,
`rqemail` varchar(40) NOT NULL,
`sid` int(11) NOT NULL,
`rlsid` int(11) NOT NULL,
`dcode` varchar(5) NOT NULL
) ENGINE=ARCHIVE COMMENT='relay archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
?>
Chopping it into individual queries fixes the problem.
practicegoodtheory at gmail dot com
19-Jun-2008 05:56
On Windows, with Apache, it would not load php_pdo_mysql.dll until I put libmysql.dll in Apache's dll path (e.g. apache/bin)
rmottey at gmail dot com
08-Jan-2008 08:51
I have been getting the error below when performing multiple queries within a single page.
Setting the attribute below did not seem to work for me.
So building on previous example i am initilizing my stmt variable on every query and a fetch all into an array. Seems to be working for me.
Error:
PDO Error 1.1: Array ( [0] => xxx[1] => yyy[2] => Lost connection to MySQL server during query )
Fix:
(PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);)
<?
try {
$dbh = new PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'xxx', 'xxx', array( PDO::ATTR_PERSISTENT => false));
$stmt = $dbh->prepare("CALL getname()");
// call the stored procedure
$stmt->execute();
// fetch all rows into an array.
$rows = $stmt->fetchAll();
foreach ($rows as $rs)
{
$id = $rs['id'];
}
//initilise the statement
unset($stmt);
$stmt = $dbh->prepare("call secondprocedure(?);");
$stmt->bindValue(1, $id);
if ( ! $stmt->execute() )
{
echo "PDO Error 1.1:\n";
print_r($stmt->errorInfo());
exit;
}
unset($stmt);
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
?>
marty at excudo dot net
16-Oct-2007 11:13
Davey wrote:
> To use "PDO::MYSQL_ATTR_USE_BUFFERED_QUERY" you should call
> PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);
>
>It will not work when passed into PDO::prepare()
>
> - Davey
Almost correct. It should be:
PDO::setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true);
so, without the quotes.
otherwise it still won't work :)
bratwizard at yahoo dot com
22-Sep-2007 06:59
> konrads dot smelkovs at gmail dot com
> 18-Jul-2007 03:39
> A note for the eager:
>> There is no way how to get returned row count from an executed prepared statement without fetching the rows.
Sure there is, just do something like this:
if ($sth = $pdo->prepare($sql)) {
$sth->execute($values);
$sth->fetch();
// get count of rows in result set
if ($sth_rc = $this->getDataset()->query('SELECT FOUND_ROWS()')) {
$row_count = $sth_rc->fetchColumn(0);
}
}
konrads dot smelkovs at gmail dot com
17-Jul-2007 09:39
A note for the eager:
There is no way how to get returned row count from an executed prepared statement without fetching the rows.
davey at php dot net
06-Jun-2007 07:46
To use "PDO::MYSQL_ATTR_USE_BUFFERED_QUERY" you should call
PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);
It will not work when passed into PDO::prepare()
- Davey
dibakar at talash dot net
11-Sep-2006 05:31
PDO is much better option for calling procedures, views or triggers of mysql 5.x versions from PHP instead of using mysqli extension. Following is a simple demo script which can help anybody on how to call and use mysql procedures through php
try {
$dbh = new PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'xxx', 'xxx', array( PDO::ATTR_PERSISTENT => false));
$stmt = $dbh->prepare("CALL getname()");
// call the stored procedure
$stmt->execute();
echo "<B>outputting...</B><BR>";
while ($rs = $stmt->fetch(PDO::FETCH_OBJ)) {
echo "output: ".$rs->name."<BR>";
}
echo "<BR><B>".date("r")."</B>";
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}