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How to delete a variable in PHP

There are three ways to delete defined variables in PHP: unset($var) $var = (unset)$var $var = null Only the first

In this tutorial, we’re going to see two ways to compare variables for equality in PHP. The general behavior

NULL stands for a variable without value. To check if a variable is NULL you can either use is_null($var) or

The following methods and operators are useful to determine whether a particular variable is an object of a specified class:

Boolean variables contain true or false values. To find out if any variable contains a Boolean value, different approaches can

Which methods are available in PHP to check if a variable is a String? In this tutorial, we are going

Which methods are available in PHP to check if a variable is an Integer? In this tutorial, we are going

Which methods are available in PHP to check if a variable is a float or a double? In this tutorial,

In this tutorial, we are going to see how to check if a variable is an array in PHP?

Which methods are available in PHP to check if a variable or an array key is defined? Check with