This is very very strange.

What username/password are you using?? (or if you don't want to give the password, just say if you are using '\' or '"' chars in it.

Nuno

Host is localhost
username is root 
password does not contain '\' or '"'--strictly alphanumeric
don't know if this makes any difference, but in the versions that don't work, when the error message prints, it puts both the username and hostname in single quotes

such as: 
Error 1045:Access denied for user 'root'@'localhost' (using password:YES)

I can't believe that this is caused by any difference between ' and ". Is your code really so simple? Don't you use any variables or escape sequences inside strings?

Are you using new passwords or old in MySQL? You can check this by "SELECT Password FROM mysql.user WHERE Host = 'localhost' AND User = 'root'". If the password begin with * it's new otherwise it's old. MySQL extension doesn't work with new passwords (but with different error message), MySQLi does.

The code listed is simple because I was taking this one step at a time.  I wanted to be sure I could attach to the DB before writing more complex code to actually do anything.  I did not want to put in the work at a full application until I knew that the motor would turn over, so to speak.

Here is the course of the issue, as it evolved:

I installed MySQl several months ago (upgraded to 4.1.7 when that was released) and have been using it via ASP using ODBC and also through the native MySQL clients successfully.  However, for portability reasons, want to migrate to the PHP scripting language and use the built in mySQL (or mySQLi) functions rather than ODBC.  So I installed Apache 2.0 and PHP 5.0.3 to gain this advantage.

However, what I found was that every attempt to do even the simplest things with mySQL via PHP were stymied by the fact that the function would not connect to the server--threw the 1045 error.

I tried several solutions--including updating the mysqllib.dll and modifying php.ini, my.ini and Apache configurations.  I tried setting the MySQL server to use only Old Passwords.  None of this had any affect on the ability of the script to even connect with the server.  Essentially, I tried every solution mentioned in various forums and help documents found on the PHP, MySQL and other sites.

I finally found one example online that used single quotes rather than double quotes on the function arguments.  When I tried using this syntax, PHP connected and continues to function correctly.  All queries issued using this connection format work perfectly.  Double quotes throw the error.

I'm sure that it must be something odd about my setup here, but since I saw several web posts mentioning trouble with this very issue, wanted to put it out as a tip for something others could try if they are having similar issues.

And I do use variables and escape sequences in strings.  What I meant (sorry I wasn't clear) is that there is nothing in the strings that comprise the actual username "root" or password "hoo25boy" (not the real password) that were formatted like escape sequences or variables and that could have been misinterpreted somehow by the PHP or MySQL engines.

I agree this is very very odd.  A simple change like going from 

$mysqli = new mysqli("host_name","user_name",
"password", "database");  

to

$mysqli = new mysqli('host_name','user_name',
'password', 'database');

shouldn't have affected this--but in test after test here it does. 


Thanks.

> I saw several web posts mentioning trouble with this very
> issue.

Can you please give us links to these posts? There can be some clue to understand this problem.

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Look in your ini file to set up quotes to work the way you want them to.  Also check the setting for 'magic-quotes'.

for the "password: yes" issue, you have to go to the terminal, then root@none, and allow the user in mysql access from there, and then set pass for the user there too.  You can't do it from PHPmyadmin, even with the masteradmin grant privs.

This report looks bogus.