Check if Variable is Empty in PHP

In this tutorial we will learn How To Check if Variable is Empty in PHP. PHP empty() function is a built-in function which can be used to check whether a variable is empty or it has a value.

PHP empty() Function

PHP empty() Function checks if a variable has a value or not.

In this example we will also use empty() function to check whether a variable is empty or it has a value.

<?php
$variable = "HowToCodeSchool.com";
if(empty($variable))
{
echo "Variable is Empty";
}
else
{
echo "Variable is Not Empty";
}
?>

In above code, else block will be executed since the variable is not empty.

<?php
$variable = "";
if(empty($variable))
{
echo "Variable is Empty";
}
else
{
echo "Variable is Not Empty";
}
?>

While in second example, variable is empty since it has no value.

Note: 0, "0", "", NULL, FALSE and array() are considered as empty values.

Equal Operator

We can also use simple equal operator to check if variable is empty or not.

<?php
$variable = "";
if($variable == '')
{
echo "Variable is Empty";
}
else
{
echo "Variable is Not Empty";
}
?>

Demo

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