Function Module

Function Module – Module to handle SQL function abstraction

Description

The Function module provides methods for executing non-standard SQL database functions in a consistent way. The following document lists the available methods, providing examples of their use. To include the Function module functionality, you need to load it first.

Loading the Function module

<?php
require_once 'MDB2.php';
$dsn 'pgsql://someuser:apasswd@somehost';
$mdb2 =& MDB2::factory($dsn);
if (
PEAR::isError($mdb2)) {
    die(
$mdb2->getMessage());
}

// loading the Function module
$mdb2->loadModule('Function');
?>

After including the module, you can access its methods like this:

Get the length of a string expression

<?php
// PHP5
$mdb2->length('expression');
// PHP4 and PHP5
$mdb2->function->length('expression');
?>

Further in the document the PHP5-compatible way will be used.

Concatenate strings

<?php
$mdb2
->concat('string1''string2');
?>

Execute a Stored Procedure

Supposing we have the following Stored Procedure (MySQL syntax):

DELIMITER //
CREATE PROCEDURE procedure1 (IN parameter1 INTEGER)
BEGIN
  DECLARE variable1 CHAR(10);
  IF parameter1 = 17 THEN
    SET variable1 = 'birds';
  ELSE
    SET variable1 = 'beasts';
  END IF;
  INSERT INTO table1 VALUES (variable1);
END 
//
DELIMITER ;

we can call it this way:

Execute a Stored Procedure

<?php
$params 
= array(17);
$mdb2->executeStoredProc('procedure1'$params);
?>
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Last updated: Thu, 31 Jul 2014 — Download Documentation
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