What is the use of isset() in php?


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What is the method to register a variable into a session?

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What are php magic methods/functions?

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What is reference variable php?

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Tell me what is needed to be able to use image function?

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When you will get the error "Cannot add header information"?

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How can we know the number of days between two given dates using PHP? How can we know the number of days between two given dates using MySQL?

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How to find the length of a string?

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