webERP Manual
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Developing New Scripts

Directory Structure

The scripts that make up the system are seperated into several directories. However, the main bulk of the webERP scripts are in the top level directory.

Construction of new scripts should make use of the following building blocks that are used throughout the system.

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This page must be included after the page has set the variable $PageSecurity to an appropriate integer (see the security schema section), has the following functons:

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This file should be included after the variable $Title has been set to the name of the page. This file relies on config.php being already loaded, so (which in turn includes config.php) must be included before The code in this script has the following functions:

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This file contains the small logo, company name and copyright notice with the closing "" tags.

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The variables in config.php are available to all of tcripts that have included There are not many now most of the configuration is stored in the database using the config table. However, the variables that give the software the information to connect to the database such as datbase user, password and host, together with the database type - dbtype - in fact only mysql is supported but there are two libraries that can be used the mysqli and the old mysql functions. There are a couple of other variables including the timezone, $RootPath which is the directory where the web server holds the system files. Also the php error_reporting code.

Having started the page with and - and then finishing with much of the work to ensure a consistent look and feel is already done.

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The only time when it is not appropriate to include or is when a pdf script is to be created. Here the file PDFStarter.php contains the initiation of the session and the check for proper user authentication and authorisation for the specific page using the $PageSecurity variable which must be defined before PDFStarter.php is included. Normally, config.php and are included seperately (and before in PDF scripts. PDF report scripts all make use of the FPDF class by Olivier Plathey but previously a differnt class was used so there is an extension to this which translates the calls to the old pdf class to the FPDF class. Probably better to write new scripts using the FPDF syntax.

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Database Abstraction -

Whilst the system has been developed using MySql it has always been envisaged that users should not be forced to use Mysql - in keeping with open source principles. For this reason all requests of the database are made via abstraction functions in This policy has been rigorously maintained and developing extensions to the system which do not conform to this scheme would destroy the portability currently available between databases. Instead of using the PHP database specific functions then the functions defined in should be used

The full list of functions should be reviewed from the file includes/ - which contains the mysql specific abstraction functions. Only these functions should be used in other scripts. Care has been taken to ensure that standards compliant SQL is used throughout, to ensure any database conversion issues are minimal. SQL specific to any RDBMS even mysql should be avoided in favour of generic standards compliant SQL. There are instances where mysql specific SQL has been used such as INTERVAL and SHOW TABLES - these are historical.

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This script holds a number of functions for manipulating dates used throughout the system - these functions all depend upon the system configuration for SESSION['DefaultDateFormat']. Amongst the most useful:

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This script has some common functions used throughout the system - in particular:

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This script holds miscellaneous functions:

locale_number_format($Number, $DecimalPlaces=0)
Displays numbers in locale of the user. See Indian Numbering System in Manual, Multilanguage, Technical Overview.
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