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last_insert_id always returns the same non-zero value

I am using last_insert_id to try to retrieve the id of the last record added to a table, just after the insert was done. The key field is auto_increment.

However, I ALWAYS get "Resource id #26", regardless of how many records there are in the table.

Even when the "next autoindex" figure (according to phpMyAdmin) is up around 31, I still get 26. I even tried completely clearing the table, but, there it was again - 26.

This is still a system in testing, and I am wondering if I have stuffed about with the table so much it needs rebuilding.

I am not sure what code or other details might be relevant.

All help appreciated!

Thanks,
Christine.

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hielo

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geckogully

ASKER

I have changed the last_insert_id to mysql_insert_id, and now I always get a value of spaces (null?) returned.

I am calling the mySQL utilities via functions (i am using php). I moved the mysql_insert_id one into the main part of the program, rather than via a function, but it still always returns zero.

Should I move the insert into the main program too, so that it is the very last statement executed before the mysql_insert_id?

Or does that not matter, as long as it was the last sql action called?

I have attached code from the main program, followed by the insert function code.

Christine.

		$insert = $db->insert($glob['dbprefix']."CubeCart_inventory", $record_prod);
 
		$result = mysql_query(" select mysql_insert_id() from ".$glob['dbprefix']."CubeCart_inventory");
		echo ("1: result = ");  echo ($result);
 
And the insert function:
 
	function insert ($tablename, $record)
	{
		if(!is_array($record)) die ($this->debug("array", "Insert", $tablename));
		
		$count = 0;
		foreach ($record as $key => $val)
		{
			if ($count==0) {$fields = "`".$key."`"; $values = $val;}
			else {$fields .= ", "."`".$key."`"; $values .= ", ".$val;}
			$count++;
		}	
		
		$query = "INSERT INTO ".$tablename." (".$fields.") VALUES (".$values.")";
		
		$this->query = $query;
		mysql_query($query, $this->db);
		
		if ($this->error()) die ($this->debug());
		
		if ($this->affected() > 0) return true; else return false;
		
	} // end insert

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SOLUTION

Guy Hengel [angelIII / a3]