Do you have any short example script which produces this ??
Version of mysql?

--Jani

Addl. information...
This morning, I recompiled and installed both PHP and MySQL. The versions are:

php-4.0.4
mysql-3.23.29a-gamma

For installation, I used:
For PHP: ./configure --with-apxs=/usr/local/apache/bin/apxs --with-mysql=/usr/local/mysql

For MySQL, I used:
./configure --prefix=/usr/local/mysql

I have a sample script active at: http://lexx.nbm.com/mysqltest.php

I will cut-and-past the code (minus database login info) below (not sure if it will be readable...):
<CODE>
		if($UserName)
		{
			$mysql_link = mysql_connect("localhost","webdb","bongos");  //Connect to database server.
			mysql_select_db("webdata",$mysql_link);   //Select webdata database
			$query = "INSERT INTO phptest VALUES (\"$UserName\",\"$Color\")";
	      $mysql_result = mysql_query($query,$mysql_link);
			if(mysql_error())
			{
				Print("<H3>Submission failed. The error reported by mySQL was: ".mysql_error()."</H3>\n");
			}
			else
			{
				Print("<H3>Submission successful! No error was reported by mySQL</H3>");
			}
		}
		else
		{
			print("<H2 ALIGN=\"CENTER\">PHP/MySQL Test</H2>\n");
			print("<form method=\"post\" action=\"$SCRIPT_NAME\">\n");
			print("This script will simply try to add what you put in the next to fields into a simple database...<BR>\n");
			print("<p>Please enter your name: ");
			print("<input type=\"text\" name=\"UserName\" size=\"30\" maxlength=\"30\"><br>\n");
			print("Plesae enter youf favorite color: ");
			print("<input type=\"text\" name=\"Color\" size=\"30\" maxlength=\"30\"> \n");
			print("<INPUT TYPE=\"SUBMIT\" NAME=\"submit\" VALUE=\"Submit to database\"><BR>\n");
		}

</CODE>

I went through my running processes, and through httpd.conf, and cannot find anything else using mySQL or other versions of PHP loaded. Any help would be appreciated. Also, I never received an email in reference to this, so something is not working right with the email portion of this bug database.

Sincerely,
Todd Butler

Update:

Aside from the request above to set up a test script and database, I never heard back from anyone on the PHP team.

I followed all of the suggestions I have been able to find in this bug base to no avail, and verified that there were no other copies of MySQL or PHP running on the server. Because the error occurred after I used PHP's instructions for doing an upgrade using apxs with Apache, I suspect there is a problem with that procedure, although at that point- recompiling and installing it from scratch didn't fix the problem.

About two weeks after I set up the above test, the server crashed due to a hard disk failure, so I had to re-build it from scratch (I have yet to find a tape drive that I can get to work with Linux). After doing fresh installs of the newest versions of PHP, MySQL, and Apache, the problem I reported went away.  

Since the error message is completely bogus, as a workaround while I was still having the problem- I added the following line to my production scripts: 

error_reporting(4);

This sets PHP up to only report parse errors. The down-side is it won't report any database errors, valid or not, but I already had my own logging/debug routines for doing that. You can set this in the PHP config file too if you want to do it globally.

Beyond that, the only real solution seems to be to install everything from scratch.

Sincerely,
Todd