plague questions

plague answers

• Simultaneous SELECT and UPDATE - Locking to prevent concurrency problems
• How to install PHP extension locally on WAMP?
• How do I protect a page only for logged users?
• What is the MySQL equivalent of PostgreSQL's EXPLAIN ANALYZE
• What's the easiest way to deal with project configuration files?
• How can I count the number of rows that match a query, but only return a subset in SQL?