Demo: Check if Variable is Null in PHP

<?php
$variable ='HowToCodeSchool.com';
if (is_null($variable))
{
echo "Variable is NULL";
}
else
{
echo "Variable is not NULL";
}
?>

Output

Variable is not NULL.

<?php
$variable = NULL;
if (is_null($variable))
{
echo "Variable is NULL";
}
else
{
echo "Variable is not NULL";
}
?>

Output

Variable is NULL.

Complete Tutorial with Code

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