ADOdb

Database Abstraction Layer for PHP

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v5:database:pdo [2019/01/06 04:22] – mnewnhamv5:database:pdo [2022/02/20 23:47] (current) – [Setting Construction Parameters] mnewnham
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 ====== PDO ====== ====== PDO ======
 ~~NOTOC~~ ~~NOTOC~~
-<WRAP right box> +
-== See Also == +
-[[http://wiki.hashphp.org/PDO_Tutorial_for_MySQL_Developers|Tutorial On PDO Connections]] +
-</WRAP>+
 ===== Description ===== ===== Description =====
-This driver supports connections using the standardized [[http://php.net/manual/en/book.pdo.php|PHP Data Objects]] connection. The ''pdo'' driver itself cannot be used, it must be used with one of the supported drivers:+ 
 +This driver supports connections using the standardized [[http://php.net/manual/en/book.pdo.php|PHP Data Objects]].  
 + 
 +Supported drivers:
  
 ^PHP Driver^Description^ADOdb Connector^ ^PHP Driver^Description^ADOdb Connector^
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 |pdo_sqlsrv|SQL Server using Windows Native Client|sqlsrv| |pdo_sqlsrv|SQL Server using Windows Native Client|sqlsrv|
    
 +<WRAP important>
 +Note that the //pdo// driver cannot be used on its own. It is a technical component that is used internally by the above drivers. 
 +</WRAP>
 +
 +
 ===== Establishing A Connection ===== ===== Establishing A Connection =====
 To establish a connection, the **//DSN//** style of connection must be used, the first argument of the DSN string being the database type, e.g. to connect to a MySQL database: To establish a connection, the **//DSN//** style of connection must be used, the first argument of the DSN string being the database type, e.g. to connect to a MySQL database:
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 $user     = 'pdo-user'; $user     = 'pdo-user';
 $password = 'pdo-pass'; $password = 'pdo-pass';
-$dsnString= 'host=localhost;dbname=employees;charset=utf8mb4'+$dsnString= 'host=localhost;dbname=employees;charset=utf8mb4';
 $db->connect('mysql:' . $dsnString,$user,$password); $db->connect('mysql:' . $dsnString,$user,$password);
  
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 ===== Preferred Drivers ===== ===== Preferred Drivers =====
-In all cases, using native drivers (listed below) provide better functionality, as well as performance, than the equivalent PDO driver.+ 
 +Using ADOdb effectively eliminates the need to use the PHP PDO driver as it hides the PHP level command: 
 + 
 +  * It provides true database abstraction, for example, the ADOdb method ''selectLimit()'' provides a true abstraction of the row limiting and offset of all databases. With PDO, you still need to provide the database specific syntax. 
 +  * In all cases, using native drivers (listed below) provide better functionality, as well as performance, than the equivalent PDO driver. This is true at both the ADOdb and PHP level 
 + 
 + 
 +===== Setting Construction Parameters ===== 
 +Certain attributes need to be passed to the [[https://www.php.net/manual/en/pdo.construct.php|PDO Constructor]], for example, changing the error mode. To facilitate this, a PDO specific settable array **'' ADOConnection::pdoParameters ''** is provided: 
 + 
 +<code php> 
 +$db = newAdoConnection('pdo'); 
 + 
 +$db->pdoParameters = [ 
 +\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION 
 +]; 
 + 
 +$dsnString= 'host=localhost;dbname=employee.fdb'; 
 +$db->connect('firebird:' . $dsnString,"SYSDBA", "password"); 
 + 
 +</code> 
 ===== The PDO setAttribute function ===== ===== The PDO setAttribute function =====
-As of ADOdb 5.21, the PDO::setAttribute() method can be emulated using [[v5:reference:connection:setconnectionparameter|setConnectionParameter()]].+For parameters that are set after the class is instantiated, The PDO::setAttribute() method can be populated using [[v5:reference:connection:setconnectionparameter|setConnectionParameter()]]. 
 ===== Individual Driver Status ==== ===== Individual Driver Status ====
 ----------------------- -----------------------
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 ^Driver Name|pdo| ^Driver Name|pdo|
 ^Data Provider|pdo| ^Data Provider|pdo|
-^Status|Inactive((This driver is not supported by ADOdb project members, but you can contribute to this driver if you have the expertise))|+^Status|Active((This driver is supported by ADOdb project members))|
 ^Windows|Yes| ^Windows|Yes|
-^Unix|No|+^Unix|Yes|
 ^ADOdb V5|Yes| ^ADOdb V5|Yes|
 ^ADOdb V6|Yes| ^ADOdb V6|Yes|
 </WRAP> </WRAP>
-The current status of this driver is unknown+== Limitations == 
 + 
 + 
 +  * There is no support for the complex binding features available in the Native Driver 
 +  * Some MetaFunctions are unavailable 
 + 
 +---------------------------------------- 
 +=== Sample Connection String === 
 +If you are using the instantclient, and there is no tsnames.ora defined, you can define a connection like this 
 +<code php> 
 + 
 +//Connecting to Oracle Express on 192.168.86.86 
 +$tns = "  
 +(DESCRIPTION = 
 +    (ADDRESS_LIST = 
 +      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.86.86)(PORT = 1521)) 
 +    ) 
 +    (CONNECT_DATA = 
 +      (SERVICE_NAME = XEPDB1) 
 +    ) 
 +  ) 
 +"; 
 +$dsnString="oci:dbname=$tns"; 
 +$db->connect($dsnString,$userName,$password); 
 + 
 +</code>
 ------------------------------------------ ------------------------------------------
 ==== pdo_pgsql ==== ==== pdo_pgsql ====
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   * Dates are always returned as strings   * Dates are always returned as strings
   * Most //**Meta**// functions are unsupported   * Most //**Meta**// functions are unsupported
-  * [[v5:reference:connection:setconnectionparameter|setConnectionParameter()]] is not supported, so changing the character set at run-time is not available.+  * [[v5:reference:connection:setconnectionparameter|setConnectionParameter()]] is not supported
   * This driver can also be used on Linux platforms, beginning with PHP Version 7. The program relies on the Microsoft drivers for Linux. For more information, see the [[v5:database:microsoft_sql_server|mssqlnative driver]]   * This driver can also be used on Linux platforms, beginning with PHP Version 7. The program relies on the Microsoft drivers for Linux. For more information, see the [[v5:database:microsoft_sql_server|mssqlnative driver]]
 +  * You cannot change the character set in the driver. This is a limitation of the PDO driver, not ADOdb
 +  * No support for parameter binding
  
 ---------------------------------------------------------------------------- ----------------------------------------------------------------------------
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 ==== pdo_firebird ==== ==== pdo_firebird ====
-<WRAP info> 
-This driver is available from version 5.21 
-</WRAP> 
 <WRAP right box round 300px> <WRAP right box round 300px>
 == Native Driver == == Native Driver ==
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 </code> </code>
 +
 +{{tag>tier2}}
 +
v5/database/pdo.1546744965.txt.gz · Last modified: 2019/01/06 04:22 by mnewnham