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