dba_sync
I know lots of you dosent really use dbase, but i've builded a class to help the one how dose.
(sorry for bad english)
- dbase.php
<?php
set_time_limit (0);
// site_path defined by parent
require_once (SITE_PATH. '/server/php/libs/dbase/handler.php');
/* DBase (dbf)
* manage dbf files, exports and search functionality
* with buildin optimizers for fast performance
*/
class DBase
{
private $handler = false;
private $searchopt = array (); // Search optimizer
private function unload ()
{
if ($this-> handler !== false)
unset ($this-> handler);
}
public function __construct ($file = false)
{
if ($file !== false)
$this-> load ($file);
}
public function __destruct ()
{
$this-> unload ();
}
public function load ($file)
{
$resource = dbase_open ($file, 0);
$this-> handler = new DBase_Handler ($resource);
return $this-> handler;
}
/* Search
* search for string inside header
* returns record number
* false returned if not found or error occurred
* limit_results gets int or false, limit_results equels one will limit the
* search results for one result only, false for no limit
*/
public function search ($headerText, $string, $limit_results = false, $handler = false)
{
if ($handler === false)
$handler = $this-> handler;
if ($this-> searchopt [$headerText][$string])
return $this-> searchopt [$headerText][$string];
else
{
$size = $handler-> getSize ();
if ( ( $headerNumber = $handler-> getHeaderNumber ($headerText) ) !== false)
{
$results = array ();
for ($i = 1; $i < $size; $i++)
{
$record = $handler-> getRecord ($i, false); // Disabled optimizer to prevent memory overflow
if (trim ($record [$headerNumber]) == $string)
{
$results[] = $i;
if ( ($limit_results !== false) && (sizeof ($results) == $limit_results) )
break;
}
}
if (sizeof ($results) > 0)
{
$this-> searchopt [$headerText][$string] = $results;
return $this-> search ($headerText, $string, $handler);
}
return false;
} else
return false;
}
}
}
?>
- dbase_handler.php
<?php
/* DBase Handler (dbf)
* handles dbase resource
*/
class DBase_Handler
{
private $resource;
private $size; // Records Count
private $header = array ();
private $dataopt = array (); // Data optimizer
private function setHeader ()
{
$this-> header = dbase_get_header_info ($this-> resource);
}
public function __construct ($resource)
{
$this-> resource = $resource;
$this-> setHeader ();
$this-> size = dbase_numrecords ($this-> resource);
}
public function __destruct ()
{
dbase_close ($this-> resource);
}
public function getRecord ($record_number, $dataopt = true)
{
if ($record_number > $this-> size)
return false;
else
{
if ($this-> dataopt [$record_number])
return $this-> dataopt [$record_number];
else
{
$record = dbase_get_record ($this-> resource, $record_number);
if ($dataopt === true) // Data saving optimizer
{
$this-> dataopt [$record_number] = $record;
return $this-> getRecord ($record_number);
} else
return $record;
}
}
}
public function getHeaderNumber ($headerText)
{
foreach ($this-> header as $index => $header)
{
if ($header ['name'] == $headerText)
{
return $index;
break;
}
}
return false;
}
public function getHeader ($headerNumber)
{
if ($headerNumber <= sizeof ($this-> header))
return $this-> header [$headerNumber];
else
return false;
}
public function getSize ()
{
return $this-> size;
}
}
?>
XXVI. dBase Functions
Introduction
These functions allow you to access records stored in dBase-format (dbf) databases.
dBase files are simple sequential files of fixed length records. Records are appended to the end of the file and delete records are kept until you call dbase_pack().
The types of dBase fields available are:
Table 50. Available types of fields
| Field | dBase Type | Format | Additional information |
|---|---|---|---|
| M | Memo | n/a | This type is not supported by PHP, such field will be ignored |
| D | Date | YYYYMMDD | The field length is limited to 8 |
| N | Number | A number | You must declare a length and a precision (the number of digits after the decimal point) |
| C | String | A string | You must declare a length. When retrieving data, the string will be right-padded with spaces to fit the declared length. |
| L | Boolean | T or Y for TRUE, F or N for FALSE | Stored and returned as an integer (1 or 0) |
| F | Float | A float number | Support for this type of field was added in PHP 5.2.0 |
Warning
There is no support for indexes or memo fields. There is no support for locking, too. Two concurrent web server processes modifying the same dBase file will very likely ruin your database.
We recommend that you do not use dBase files as your production database. Choose any real SQL server instead; » MySQL or » Postgres are common choices with PHP. dBase support is here to allow you to import and export data to and from your web database, because the file format is commonly understood by Windows spreadsheets and organizers.
Installation
In order to enable the bundled dbase library and to use these functions, you must compile PHP with the --enable-dbase option.
Runtime Configuration
This extension has no configuration directives defined in php.ini.
Resource Types
This extension has no resource types defined.
Examples
Many examples in this reference require a dBase database. We will use /tmp/test.dbf that will be created in the example of dbase_create().
Predefined Constants
This extension has no constants defined.
Table of Contents
- dbase_add_record — Adds a record to a database
- dbase_close — Closes a database
- dbase_create — Creates a database
- dbase_delete_record — Deletes a record from a database
- dbase_get_header_info — Gets the header info of a database
- dbase_get_record_with_names — Gets a record from a database as an associative array
- dbase_get_record — Gets a record from a database as an indexed array
- dbase_numfields — Gets the number of fields of a database
- dbase_numrecords — Gets the number of records in a database
- dbase_open — Opens a database
- dbase_pack — Packs a database
- dbase_replace_record — Replaces a record in a database
add a note
User Contributed NotesdBase Functions
bi.idan AT gmail.com
16-Apr-2007 04:40
16-Apr-2007 04:40
Hadi Rusiah / deegos at yahoo dot com
08-May-2004 10:33
08-May-2004 10:33
If you are using PHP < 5, you can use this function to retrieve dbf header
<?
function get_dbf_header($dbfname) {
$fdbf = fopen($dbfname,'r');
$dbfhdrarr = array();
$buff32 = array();
$i = 1;
$goon = true;
while ($goon) {
if (!feof($fdbf)) {
$buff32 = fread($fdbf,32);
if ($i > 1) {
if (substr($buff32,0,1) == chr(13)) {
$goon = false;
} else {
$pos = strpos(substr($buff32,0,10),chr(0));
$pos = ($pos == 0?10:$pos);
$fieldname = substr($buff32,0,$pos);
$fieldtype = substr($buff32,11,1);
$fieldlen = ord(substr($buff32,16,1));
$fielddec = ord(substr($buff32,17,1));
array_push($dbfhdrarr, array($fieldname,$fieldtype,$fieldlen,$fielddec));
}
}
$i++;
} else {
$goon = false;
}
}
fclose($fdbf);
return($dbfhdrarr);
}
$arr = get_dbf_header('/data/file.dbf');
print_r($arr);
?>