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what is the use of isset() in php?

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what is the use of isset() in php?
posted Mar 13, 2017 by Kavyashree

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1 Answer

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isset() function

The isset () function is used to check whether a variable is set or not. If a variable is already unset with unset() function, it will no longer be set. The isset() function return false if testing variable contains a NULL value.
Syntax
isset(variable1, variable2......)
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answer May 2, 2017 by Pooja Singh
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