What is isset and unset in php?


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More PHP Interview Questions

How can we increase execution time of a php script?

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How to check your php installation?

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Differentiate between php5 and php7?

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How to convert a string to lowercase in php?

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What is the use of "echo" in php?

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How stop the execution of a php scrip?

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Tips to optimize the php script..... Suggestion for exception handling in php...

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Why is php so popular?

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So if md5() generates the most secure hash, why would you ever use the less secure crc32() and sha1()?

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How to join multiple strings into a single string?

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What does $_env mean?

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This is regarding file uploading. 1. Who will be the owner of the uploaded file ? 2. What permission you will give for an uploaded file ? 3. What is mean by user, group and others and what kind of permission you will give for each user and explain the reason?

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