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if variable is null php
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How to check if submitted variable is null in PHP?

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March 18, 2011 at 4:05 PM

Check if Variable is NULL in PHP

You can use isset($var) to check if the variable is not defined or null in PHP. and after setting a variable, you might need to reset it too. In that case you can use...

unset($var);

This is useful in managing the session variable.

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