What is the difference between null and empty?


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What does $globals mean?

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What function should you use to join array elements with a glue string?

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Why is used in php?

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Is age interval or ordinal data?

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Explain php parameterized functions.

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What is the use of mysql_fetch_assoc in php?

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What is difference between include and include_once in php?

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Tell me what is the use of isset() in php?

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If we login more than one browser windows at the same time with same user and after that we close one window, then is the session is exist to other windows or not? And if yes then why? If no then why?

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What is the current stable version of php?

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