roa3 questions

• Steps in implementing hashtable in PHP and Mysql
• Can I merge two MySQL queries into one?
• How to select multiple records (row) from a column in mysql?
• Should I use "id" or "unique username"?
• How does a hash table work? Is it faster than "SELECT * from .."
• What is the "?" symbol in URL used for in php?
• How to find a string in an array in PHP?

roa3 answers