How to validate an email address format

There are several ways of validating an email address format. Normally, I do it the following way: 1. I first define the regular expression for the email format: define (“FORMAT”,”^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$”); 2. To validate the email address provided is correct: if ( !eregi (FORMAT, $email)) echo “The email provided has an […]


PHP security considerations

When developing a script wether if it’s in PHP or any other language you should always consider the security aspect. I’m sure the last thing you want is to get your script (and ultimately your data) hacked. To make sure this does not happen there are a few steps you […]


How to identify a MySQL query problem

Sometimes you happen to have a problem with one of your MySQL queries and you simply can’t seem to understand why. Well, one thing that helps is to use the mysql_error() function. This function returns the message of the MySQL error you’re getting. Example: $action = “INSERT INTO table (name, […]


Update Linklist dynamically

Some people dread the idea of having to update the Linklist dynamically but in fact it’s a very simple process: Update the PROGxx member that your system uses from PARMLIB: Add/remove libraries as required Change the LNKLSTnn reference to LNKLSTnn+1 Issue the following MVS commands: SETPROG LNKLST,UNALLOCATE P LLA SET […]