169 lines
6.8 KiB
PHP
169 lines
6.8 KiB
PHP
<?php
|
|
/************************************************************
|
|
DBF reader Class v0.04 by Faro K Rasyid (Orca)
|
|
orca75_at_dotgeek_dot_org
|
|
v0.05 by Nicholas Vrtis
|
|
vrtis_at_vrtisworks_dot_com
|
|
1) changed to not read in complete file at creation.
|
|
2) added function to read individual rows
|
|
3) added support for Memo fields in dbt files.
|
|
4) See: http://www.clicketyclick.dk/databases/xbase/format/dbf.html#DBF_STRUCT
|
|
for some additional information on XBase structure...
|
|
5) NOTE: the whole file (and the memo file) is read in at once. So this could
|
|
take a lot of memory for large files.
|
|
|
|
Input : name of the DBF( dBase III plus) file
|
|
Output : - dbf_num_rec, the number of records
|
|
- dbf_num_field, the number of fields
|
|
- dbf_names, array of field information ('name', 'len', 'type')
|
|
|
|
Usage example:
|
|
$file= "your_file.dbf";//WARNING !!! CASE SENSITIVE APPLIED !!!!!
|
|
$dbf = new dbf_class($file);
|
|
$num_rec=$dbf->dbf_num_rec;
|
|
$num_field=$dbf->dbf_num_field;
|
|
|
|
for($i=0; $i<$num_rec; $i++){
|
|
$row = $dbf->getRow($i);
|
|
for($j=0; $j<$num_field; $j++){
|
|
echo $row[$j].' ');
|
|
}
|
|
echo('<br>');
|
|
}
|
|
|
|
Thanks to :
|
|
- Willy
|
|
- Miryadi
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the GNU Lesser General Public License for more details.
|
|
|
|
**************************************************************/
|
|
class dbf_class {
|
|
|
|
var $dbf_num_rec; //Number of records in the file
|
|
var $dbf_num_field; //Number of columns in each row
|
|
var $dbf_names = array(); //Information on each column ['name'],['len'],['type']
|
|
//These are private....
|
|
var $_raw; //The raw input file
|
|
var $_rowsize; //Length of each row
|
|
var $_hdrsize; //Length of the header information (offset to 1st record)
|
|
var $_memos; //The raw memo file (if there is one).
|
|
|
|
function dbf_class($filename) {
|
|
if ( !file_exists($filename)) {
|
|
echo 'Not a valid DBF file !!!'; exit;
|
|
}
|
|
$tail=substr($filename,-4);
|
|
if (strcasecmp($tail, '.dbf')!=0) {
|
|
echo 'Not a valid DBF file !!!'; exit;
|
|
}
|
|
|
|
//Read the File
|
|
$handle = fopen($filename, "r");
|
|
if (!$handle) { echo "Cannot read DBF file"; exit; }
|
|
$filesize = filesize($filename);
|
|
while(!feof($handle)) {
|
|
$this->_raw = fread ($handle, 1024);
|
|
}
|
|
fclose ($handle);
|
|
//Make sure that we indeed have a dbf file...
|
|
if(!(ord($this->_raw[0]) == 3 || ord($this->_raw[0]) == 131) && ord($this->_raw[$filesize]) != 26) {
|
|
echo 'Not a valid DBF file !!!'; //exit;
|
|
}
|
|
// 3= file without DBT memo file; 131 ($83)= file with a DBT.
|
|
$arrHeaderHex = array();
|
|
for($i=0; $i<32; $i++){
|
|
$arrHeaderHex[$i] = str_pad(dechex(ord($this->_raw[$i]) ), 2, "0", STR_PAD_LEFT);
|
|
}
|
|
//Initial information
|
|
$line = 32;//Header Size
|
|
//Number of records
|
|
$this->dbf_num_rec= hexdec($arrHeaderHex[7].$arrHeaderHex[6].$arrHeaderHex[5].$arrHeaderHex[4]);
|
|
$this->_hdrsize= hexdec($arrHeaderHex[9].$arrHeaderHex[8]);//Header Size+Field Descriptor
|
|
//Number of fields
|
|
$this->_rowsize = hexdec($arrHeaderHex[11].$arrHeaderHex[10]);
|
|
$this->dbf_num_field = floor(($this->_hdrsize - $line ) / $line ) ;//Number of Fields
|
|
|
|
//Field properties retrieval looping
|
|
for($j=0; $j<$this->dbf_num_field; $j++){
|
|
$name = '';
|
|
$beg = $j*$line+$line;
|
|
for($k=$beg; $k<$beg+11; $k++){
|
|
if(ord($this->_raw[$k])!=0){
|
|
$name .= $this->_raw[$k];
|
|
}
|
|
}
|
|
$this->dbf_names[$j]['name']= $name;//Name of the Field
|
|
$this->dbf_names[$j]['len']= ord($this->_raw[$beg+16]);//Length of the field
|
|
$this->dbf_names[$j]['type']= $this->_raw[$beg+11];
|
|
}
|
|
if (ord($this->_raw[0])==131) { //See if this has a memo file with it...
|
|
//Read the File
|
|
$tail=substr($tail,-1,1); //Get the last character...
|
|
if ($tail=='F'){ //See if upper or lower case
|
|
$tail='T'; //Keep the case the same
|
|
} else {
|
|
$tail='t';
|
|
}
|
|
$memoname = substr($filename,0,strlen($filename)-1).$tail;
|
|
$handle = fopen($memoname, "r");
|
|
if (!$handle) { echo "Cannot read DBT file"; exit; }
|
|
$filesize = filesize($memoname);
|
|
$this->_memos = fread ($handle, $filesize);
|
|
fclose ($handle);
|
|
}
|
|
}
|
|
|
|
function getRow($recnum) {
|
|
$memoeot = chr(26).chr(26);
|
|
$rawrow = substr($this->_raw,$recnum*$this->_rowsize+$this->_hdrsize,$this->_rowsize);
|
|
$rowrecs = array();
|
|
$beg=1;
|
|
if (ord($rawrow[0])==42) {
|
|
return false; //Record is deleted...
|
|
}
|
|
for ($i=0; $i<$this->dbf_num_field; $i++) {
|
|
$col=trim(substr($rawrow,$beg,$this->dbf_names[$i]['len']));
|
|
if ($this->dbf_names[$i]['type']!='M') {
|
|
$rowrecs[]=$col;
|
|
} else {
|
|
$memobeg=$col*512; //Find start of the memo block (0=header so it works)
|
|
$memoend=strpos($this->_memos,$memoeot,$memobeg); //Find the end of the memo
|
|
$rowrecs[]=substr($this->_memos,$memobeg,$memoend-$memobeg);
|
|
}
|
|
$beg+=$this->dbf_names[$i]['len'];
|
|
}
|
|
return $rowrecs;
|
|
}
|
|
|
|
function getRowAssoc($recnum) {
|
|
$rawrow = substr($this->_raw,$recnum*$this->_rowsize+$this->_hdrsize,$this->_rowsize);
|
|
$rowrecs = array();
|
|
$beg=1;
|
|
if (ord($rawrow[0])==42) {
|
|
return false; //Record is deleted...
|
|
}
|
|
for ($i=0; $i<$this->dbf_num_field; $i++) {
|
|
$col=trim(substr($rawrow,$beg,$this->dbf_names[$i]['len']));
|
|
if ($this->dbf_names[$i]['type']!='M') {
|
|
$rowrecs[$this->dbf_names[$i]['name']]=$col;
|
|
} else {
|
|
$memobeg=$col*512; //Find start of the memo block (0=header so it works)
|
|
$memoend=strpos($this->_memos,$memoeot,$memobeg); //Find the end of the memo
|
|
$rowrecs[$this->dbf_names[$i]['name']]=substr($this->_memos,$memobeg,$memoend-$memobeg);
|
|
}
|
|
$beg+=$this->dbf_names[$i]['len'];
|
|
}
|
|
return $rowrecs;
|
|
}
|
|
}//End of Class
|
|
?>
|