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Bug #46282 Corrupt DBF When Using DATE
Submitted: 2008-10-12 14:03 UTC Modified: 2009-01-17 17:22 UTC
Avg. Score:4.6 ± 0.8
Reproduced:15 of 15 (100.0%)
Same Version:1 (6.7%)
Same OS:0 (0.0%)
From: mattias dot geniar at gmail dot com Assigned:
Status: Closed Package: dBase related
PHP Version: 5.2.6 OS: CentOS 5.2
Private report: No CVE-ID: None
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From: mattias dot geniar at gmail dot com
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 [2008-10-12 14:03 UTC] mattias dot geniar at gmail dot com
Creating a dBase file with a DATE-field type, will corrupt the database. Work-around as for now is to use a CHAR-type and convert it later manually.

This bug is similar to #42261, which dates back to August 2007.

Reproduce code:
	// database "definition"
	$def = array(
	  array("date",     "D"),
	  array("name",     "C",  50),
	  array("email",    "C", 128),
	  array("ismember", "L")

	// creation
	if (!dbase_create('test.dbf', $def)) {
	  echo "Error, can't create the database\n";

	// open in read-write mode
	$db = dbase_open('test.dbf', 2);

	if ($db) {
		for ($i = 0; $i < 5; $i++) {
			dbase_add_record($db, array(
		              'Name #'. $i,
		              'Email #'. $i,

Expected result:
A simple database with 5 lines, where DATE, Name & Email are entered correctly.

Actual result:
The code above will create file called "test.dbf", which is corrupted when opening it with any normal DBF-viewer (CDBF, DBF Manager, ...). If the DATE-field is replaced with a CHAR-field, all works fine. Date-format is taken from the PHP.NET website and confirmed by the dBase-format.


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 [2008-11-10 11:32 UTC]
Please try using this CVS snapshot:
For Windows:

 [2008-11-18 01:00 UTC] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2009-01-15 10:48 UTC] no at spam dot net
I have the same problem on FreeBSD 6.3-STABLE, PHP5.2.8
 [2009-01-17 13:44 UTC] arne at bukkie dot nl
The problem is that a record of type D (date) as well as type L (logical) get's into the database with the length of 0 and not 8 (or 1 in the case of L). 

I traced down this bug to the put_dbf_field() function in dbf_head.c In there the record is written to disk, but in neither of the D and L types the length of the field is put in the correct struct. The fix is to remove both the cases for D and L so the length is set using the default case.


196     switch (dbf->db_type) {
197         case 'N':
198         dbfield.dbf_flen[0] = dbf->db_flen;
199         dbfield.dbf_flen[1] = dbf->db_fdc;
200         break;
201         case 'D':
202         dbf->db_flen = 8;
203         break;
204         case 'L':
205         dbf->db_flen = 1;
206         break;
207         default:
208             put_short(dbfield.dbf_flen, dbf->db_flen);


196     switch (dbf->db_type) {
197         case 'N':
198         dbfield.dbf_flen[0] = dbf->db_flen;
199         dbfield.dbf_flen[1] = dbf->db_fdc;
200         break;
201         default:
202             put_short(dbfield.dbf_flen, dbf->db_flen);
203     }       

I am aware this is not the way to submit fixes but I'm limited by time and still wanted to share the knowledge I did proceed using comments to specify this. Hopefully someone with an CVS account can use this info to get the change into the repository.
 [2009-01-17 17:22 UTC]
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
Thank you for the report, and for helping us make PHP better.

Fixed, thanks for the patch!
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