Coding

Filter Some Keys in Multi Dimensional Arrays in Php

/** * Cleans up multi-dimensional arrays. * 1st dimension is a simple index * 2nd dimension includes the desired keys * * @param mixed $array * @param mixed $keysToInclude */ public function cleanUpArray($array, $keysToInclude) { $returnArray = array(); $i = 0; foreach($array as $item){ foreach($keysToInclude as $key){ $returnArray[$i][$key] = $item[$key]; } $i++; } return $returnArray; }

MySQL Update If Exist Else Insert Procedure

Are you tired of checking data in your code before inserting? Well MySQL procedures are here to rescue. This simple procedure shows how you can do that: CREATE PROCEDURE ` update_insert_user ` ( IN uid2 int ) BEGIN DECLARE last_login2 DATETIME; SELECT ` last_login ` INTO last_login2 FROM ` user ` WHERE ` uid ` = uid2 LIMIT 1 ; IF last_login2 IS NULL THEN INSERT INTO ` user ` ( ` uid ` , ` last_login ` ) values (uid2, now()); ELSE UPDATE ` user ` SET ` last_login ` = now() WHERE ` uid ` = uid2 LIMIT 1 ; END IF ; END

Codeigniter Creates a New Session With Each Page Load

Just spent 3 hours debugging a session bug in my webapp. CodeIginter was creating a brand new session with each page load. The issue was a misconfiguration with my config file. Fix was simple, in /application/config/config.php, make sure correct domain is set for $config['cookie_domain'].

Codeigniter Out of Memory Error

Query Saving is a feature of CI’s database class that stores the results of every query in memory until the controller is finished executing. As it turns out, in version 1.6.0, the ability to turn this off was added. The addition of the save_queries variable is listed in the Change Log, but as of the latest release of 2.0.0 last week, it still hasn’t made the documentation. $this->db->save_queries = FALSE; via Undocumented CodeIgniter | Green Egg Media. ...

ssh_exchange_identification: Connection closed by remote host

I tried to login to my server tonight but kept getting following error message: ssh_exchange_identification: Connection closed by remote host The fix was simple, at least if you have access to server via cPanel. Just restart sshd service via cPanel/WHM.

Setting Up Pentaho BI on Windows Box

I am not sure if this works anymore or not. I don’t use Pentaho now but this post seems popular, so leaving it here for now. Contact me if this is incorrect and needs to be corrected or taken down. Download Pentaho BI Pre-Configured Installation from [http://www.pentaho.org/download/ga.php] Install JDK5. Open C:\pentaho-demo\pentaho-solutions\system\publisher_config.xml. Add a password for publishing reports. Delete all folders except reporting under C:\pentaho-demo\pentaho-solutions\samples. Delete all .xaction and .properties files under reporting. Copy JDBC driver for your database under C:\pentaho-demo\jboss\server\default\lib. I used Oracle 10g driver, it is called ojdbc.jar. Edit .jsp file to change the look of default Pentaho website under C:\pentaho-demo\jboss\server\default\deploy\pentaho.war\jsp. Add path to your JDK in start-pentaho.bat located under C:\pentaho-demo. For example, set JAVA\_HOME=C:\Program Files\Java\jdk1.5.0\_11 Double click on start-pentaho.bat. Open C:\pentaho-demo\jboss\server\default\deploy\pentaho.war\WEB-INF\web.xml. Search for base-url and add your server’s ip. Now you should be able to publish reports to Pentaho using Report Wizard or Report Designer. Once you publish report, you will need to go to C:\pentaho-demo\jboss\server\default\deploy and open newly created data source file named something like ???????-ds.xml. If your database is Oracle you will need to change driver class property to oracle.jdbc.driver.OracleDriver And your newly published report should be accessible via Pentaho now.

Useful Sar Sysstat Examples for Unix Linux Performance Monitoring

Using sar, you can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks. via 10 Useful Sar (Sysstat) Examples for UNIX / Linux Performance Monitoring.