I am designing a php mysql webapp. In that, a database usage log has to be maintained , which will record
1.User ip
2.Timestamp
3.operation performed(Add,edit or delete)
4.Colmns changed
5.rowid
6.old value
7.new value
Please suggest any example scripts.
If you are using your own database class, just add this logging to that class. Otherwise you will have to make a database class to do it and start using that class instead of using mysql_query directly.
There are many DB profilers available. You can configure that and use them. You can use XDebug.
Another link : http://particletree.com/features/php-quick-profiler/
Related
I'm trying to do some migrations from an old site to a new site. The old site uses MySQL and the new site uses PostgreSQL. My problem is I wrote a migration script in PHP that queries info from the old DB so that I can insert them into the new DB within that same script. The reason I need the script is I have to call other functions that do things and manipulate the data since the table columns aren't a one for one match so I can't just do a backup and restore type situation. I have a class for both DB's that I use.
The mysql queries work but postgres' don't. They get error messages saying pg_query(): 19 is not a valid PostgreSQL link resource in xxx
So is it possible to run them both in the same script? If I call the two scripts separately it works ok but I can't get the data from the old server to the new one.
I've looked everywhere and don't see many questions needing to use both DB's in one file.
Any help would be cool.
You are using the same variable for both resources and passing the mysql resource to the postgresql function
I just found out that PHP and APEX contrast each other. What I'd like to do is manipulate the Oracle database using PHP instead of APEX.
The main reason I'd want to do this is to use an Oracle database free of charge.
As a beginner, you might find this useful:
http://php.net/manual/en/function.oci-connect.php
Also see the documentation of the other related functions used in the codes of that page (they can be found in that site as well).
You might need some other tools like Oracle SQL Developer, or TOAD for Oracle - to do some of the initial database manipulation works (i.e - unlocking users) and other related tasks (like manually executing queries to check the correctness of the query, checking whether the database / table getting modified / updated / altered according to the application logic).
I have a site under drupal (using mysql) but need it to read from a external sql database and make quires/reports, maybe using views2?
Is is at all possible? I been looking for a solution to just read (not import, its thousands of entries...) from an external database for hours and not sure if its even possible.
Drupal can access external databases, assuming that they are one of the types Drupal supports.
I will refer you to this handbook page: How to connect to multiple databases within Drupal.
However, to actually access data in the external database, you will need to write custom code, probably in a custom module. Essentially, you will need to do something like:
// Set Database API to use the other database.
db_set_active('external_db');
// Query the database.
db_query("SELECT * FROM {your_table} WHERE condition = 'value'");
// Set the Database API back to the default db.
db_set_active('default');
Essentially, point the database to the external database, make your reads and writes, and switch back. If you forget to switch back, Drupal will crash as it's core functions will try to work with the non-Drupal database.
It's possible to define several database connections in your settings.php and use db_set_active to select which database to use.
If you want to do this with views, you might need to do some extra work and embed the view after setting the active database to the external one.
Without writing code, you should be able to create views of the secondary database using the Table Wizard module. However, given how Drupal 6 handles its database abstraction, this will require that the secondary database be the same type as the main Drupal database (eg, either both are MySQL or both are Postgresql).
I have a working PHP server. Now I want to use databases (MySQL or something similar). Is it possible to create a database from PHP?
I would like to emphasize that in my case I do not have any user-name and password which I can use to connect to MySQL server. I also do not have a control-panel where I could create a database or a table in an existing database.
ADDED:
I think SQLite is what I need. But if I try to create a new database from PHP I see that PHP tries to create a file in a directory which is different from the directory where my files are supposed to be. Then it reports that it is unable to create the database and I think it is because it tries to create in the directory to which I have no permission to write. Can I force PHP to create SQLite in a specific directory?
I'm assuming you want to create an SQL database without access to a stand-alone database server. You could use SQLite, which is a library that creates a lightweight database in a single file without separate processes.
It's not quite as efficient as a standalone database server, however, so if you need performance, use a proper database server. It's not an unreasonable requirement for a high-performance web app.
Mysql,no. SqlLite is a possibility, you only need write permissions on the filesystem.
www.sqlite.org/
I would like to emphasize that in my
case I do not have any user-name and
password to which I can use to connect
to MySQL server. I also do not have a
control-panel where I could create a
database or a table in an existing
database.
This question is confusing to me, because if you're using MySQL you should be able to create a database, with a username and password to connect, using their command line admin tool. That's also the way to create a database or a table as well.
Are you saying you don't have access to the admin tool? You don't have an account? If so, you'll need to ask for them from the person who does have such access.
An option is to set up an SQLite database in a directory outside of your htdocs folder. This is so people can't type in the name of the database file and download the entire database, severely compromising security.
If you are so inclined, you can even set up a layer of abstraction between PHP and the DBMS using PDO. Then, in order to create the database object, you would specify a DSN specific to SQLite write something like this:
$pdo_obj = new PDO('sqlite:/path/to/my_database.sqlite3');
and then query it like a normal PDO object using the PDO functions.
This method would better allow for easier migration to using a client-server DBMS once you can get one set up; it would just be a matter of copying the table structure and data over to the new database, and changing the DSN to something appropriate.
Creating a database through PHP is possible, but for that you need a connection to the database, which needs a username/password pair or some kind of authentication. Unless your database allows anonym logins or something similar, it's not possible.
Yes, just fire a create database sql query from PHP
http://dev.mysql.com/doc/refman/5.0/en/create-database.html
I have a windows program which generates PGP forms which will be filled in later.
Those PHP forms will populate a database. It looks very much like MySql, but I can't be certain, so let's call it ODBC.
And, yes, it does have to be a windows program.
There will also be PHP forms which query the database - examine which tables and fields it contains and then generates forms which can be used to search the database (e.g, it finds a table with fields "employee_name", etc and generates a form which lets you search based on employee name.
Let's call that design time and run time.
At design time, some manager or IT guy or similar gets to define the nature of the database and at runtime 1) a worker fills in the form daily and 2) management can extract reports.
Here's my question: given that the database is defined at "design time" (and populated at run time), where and how is best to do so?
1 I could use an ODBC interface from the windows program, but I am having difficulty finding something good to work with Delphi. Things like ADO and firebird tend to expect you to already have a database and allow you to manipulate it, but I can find no code example of how to create a database and some tables, so ...
2 I could used DOS commands from Delphi in my windows program. I just tried and got a response to MySql --version, but am not sure if MySql etc are more interactive. That is, can I use a script file or a very long stacked command with semicolons and returns separating? e.g 'CREATE DATABASE db; CREATE TABLE t1;'
3) Since the best way to work with databases seems to be PHP, perhaps my windows program could spit out a PHP page which would, when run in a browser, create the database.
I have tried to make this as uncomplicated as I can, but please feel free to ask questions. It may be that there are several valid ways, but there is probably one 'better' solution in terms of ease of implementation or maintenance.
Better scratch option 3. What if the user later wants to come back and have the windows program change the input form? It needs to update the database too.
Creating a database is usually a database administrator task. Unless it is a local database, maybe an embedded one, the user would need to know where and how create the database on the remote server, and she can have no clue about it. Where to store the database files? Which disks are available? And there could be many more parameters to set (memoery buffers size, etc.), users to be created and so on. And also you need very elevate privileges to be able to create a database, not something you give to average users or applications.
Thereby usually you ask the database administrator to create your database/schema, he will give you the credentials you need to connect, and then your application (or its setup) will create and initialize the needed objects (tables, etc.). Creating table (and other object) is usually as simple as running "CREATE TABLE...." statements. Just remember SQL takes one command only, if you need to run several commands you have to send them one after another yourself, although there are Delphi components which are able to split a script in commands and run one after another.