This question could mean one of two things. It might be, "How do I write Perl or PHP code that uses a MySQL or...
PostgreSQL database?" Or, it might be, "Is it possible to write functions and procedures in MySQL and PostgreSQL using Perl or PHP?" For the former, there are a few choices. PHP offers extensions specific to MySQL and to PostgreSQL, so you might write code using mysql_query or pg_query. You can also use PDO or ODBC to connect in a more or less database agnostic manner.
With the aid of some user defined functions and a thread-safe compilation, it is possible to write functions for MySQL using Perl and PHP. See http://www.linuxjournal.com/article/6841 and http://www.sklar.com/page/article/myphp for details. It is possible that future versions of MySQL will allow a more "plug and play" approach to coding procedures in other languages.
Related Q&A from Scott Noyes
Get suggestions for choosing MySQL character sets and field collations from expert Scott Noyes.continue reading
A MySQL expert describes two ways that the multi-master support can be used.continue reading
An expert describes where to find information on detection deadlock algorithms in MySQL.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.