#40394 [Com]: mssql_bind() converts empty strings to null

ID: 40394 Comment by: alexr at oplot dot com Reported By: rnerovich at gmail dot com Status: Assigned Bug Type: MSSQL related Operating System: XP/2003 server PHP Version: 5.2.0 Assigned To: fmk New Comment: Guys, I was fix (temporarily) this bug, please see the http://bugs.php.net/bug.php?id=44325 Previous Comments: ------------------------------------------------------------------------ [2007-06-21 10:12:22] smargroth at hotmail dot com I have the same problem and it makes me a headache all the time. This bug is very annoying, as empty string is normal and valid value, and is different from NULL value. I have non-NULL-able columns, and I cannot insert empty strings because of this stupid bug. The only workaround is to make NULL-able columns, but then I could not distinguish between omitted (NULL) or valid empty string. ------------------------------------------------------------------------ [2007-02-07 23:27:04] tony2001@php.net Assigned to the maintainer. ------------------------------------------------------------------------ [2007-02-07 23:19:24] rnerovich at gmail dot com Just tried the new snapshot with the same result. 885: [02/07] [17:17:30] *** array ( 0 => 'ükÁ#ðÌæM†TèÇS±í°', 'ucode' => 'ükÁ#ðÌæM†TèÇS±í°', 1 => NULL, 'phone' => NULL, 2 => NULL, 'account' => NULL, 3 => '423998059-130628001', 'ealoc' => '423998059-130628001', 4 => '2007-02-07 17:17:21', 'time' => '2007-02-07 17:17:21', 5 => 'g÷r}Q\'N°¥@Iñ*¬', 'recid' => 'g÷r}Q\'N°¥@Iñ*¬', 6 => NULL, 'prbstr' => NULL, ) ------------------------------------------------------------------------ [2007-02-07 22:48:56] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php5.2-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.2-win32-latest.zip ------------------------------------------------------------------------ [2007-02-07 22:36:18] rnerovich at gmail dot com Description: ------------ When using mssql_bind() to pass an empty string to a stored procedure, the empty string is converted to NULL. This problem has been reported by others, but either closed or marked as BOGUS, which is not the case, as I've reproduced this on both development and deployed systems. Reproduce code: --------------- CREATE PROCEDURE REC_PROC_INSERT_MS_INTF @UCODE UNIQUEIDENTIFIER, @PHONE VARCHAR(10), @ACCOUNT VARCHAR(25), @EALOC VARCHAR(38), @TIME DATETIME, @RECID UNIQUEIDENTIFIER, @PRBSTR VARCHAR(30) AS SELECT @UCODE as ucode, @PHONE as phone, @ACCOUNT as account, @EALOC as ealoc, @TIME as time, @RECID as recid, @PRBSTR as prbstr RETURN 1 GO $sp = mssql_init('REC_PROC_INSERT_MS_INTF',$dblink->dbresource); mssql_bind($sp,"RETVAL",&$rc,SQLINT4,TRUE,TRUE,4); mssql_bind($sp,"@UCODE",$ucode,SQLVARCHAR,FALSE,FALSE,strlen($ucode)); mssql_bind($sp,"@PHONE",$phone,SQLVARCHAR,FALSE,FALSE,10); mssql_bind($sp,"@ACCOUNT",$account,SQLVARCHAR,FALSE,FALSE,25); mssql_bind($sp,"@EALOC",$ealoc,SQLVARCHAR,FALSE,FALSE,38); mssql_bind($sp,"@TIME",$currtime,SQLVARCHAR,FALSE,FALSE,strlen($currtime)); mssql_bind($sp,"@RECID",$recId,SQLVARCHAR,FALSE,FALSE,strlen($recId)); mssql_bind($sp,"@PRBSTR",$problem,SQLVARCHAR,FALSE,FALSE,30); $result = mssql_execute($sp); if($result){ $row = mssql_fetch_array($result); global $log; $log->Writelog(var_export($row,true)); } Expected result: ---------------- I would expect the empty strings to stay empty. This causes major problems with NON-NULLABLE SQL fields!!! array ( 0 => 'ükÁ#ðÌæM†TèÇS±í°', 'ucode' => 'ükÁ#ðÌæM†TèÇS±í°', 1 => '', 'phone' => '', 2 => '', 'account' => '', 3 => '423998059-130628001', 'ealoc' => '423998059-130628001', 4 => '2007-02-07 16:20:54', 'time' => '2007-02-07 16:20:54', 5 => 'g÷r}Q\'N°¥@Iñ*¬', 'recid' => 'g÷r}Q\'N°¥@Iñ*¬', 6 => '', 'prbstr' => '', ) Actual result: -------------- when any of the strings (not uniqueidentifiers) are set to an empty string ($phone = '') the following is received from the var_export() array ( 0 => 'ükÁ#ðÌæM†TèÇS±í°', 'ucode' => 'ükÁ#ðÌæM†TèÇS±í°', 1 => NULL, 'phone' => NULL, 2 => NULL, 'account' => NULL, 3 => '423998059-130628001', 'ealoc' => '423998059-130628001', 4 => '2007-02-07 16:20:04', 'time' => '2007-02-07 16:20:04', 5 => 'g÷r}Q\'N°¥@Iñ*¬', 'recid' => 'g÷r}Q\'N°¥@Iñ*¬', 6 => NULL, 'prbstr' => NULL, ) the GUIDS look like garbage, but are correct. The strings however are all NULL if they were sent in as '' This is what var_export() reports if all strings are set to ' ' (one space) array ( 0 => 'ükÁ#ðÌæM†TèÇS±í°', 'ucode' => 'ükÁ#ðÌæM†TèÇS±í°', 1 => ' ', 'phone' => ' ', 2 => ' ', 'account' => ' ', 3 => '423998059-130628001', 'ealoc' => '423998059-130628001', 4 => '2007-02-07 16:20:54', 'time' => '2007-02-07 16:20:54', 5 => 'g÷r}Q\'N°¥@Iñ*¬', 'recid' => 'g÷r}Q\'N°¥@Iñ*¬', 6 => ' ', 'prbstr' => ' ', ) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=40394&edit=1