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What are the differences between php3 and php4 and php5? What is the current stable version of php? What advance thing in php7?
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What are escaping characters? Explain with an example?
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we store and display scores of users in different games. In MySQL, records are stored as tuples (user-id, game-id, score). Now we need to support ranks of users, i.e., each user should be informed of his current rank in the community. The challenge is to come up with the best way to store the data in MySQL so that the requirements are efficiently met.
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