How to check if a variable is empty in PHP?

The empty() function is an in-built function in PHP which is used to check whether a variable is empty or not.

Example of empty function:

<?php
$var1 = "";
if(empty($var1))
{
echo"Yes, variable is empty";
}
else
{
echo"No, variable is not empty";
}
?>

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Here is the list of values, that are returned as an empty

• “” (an empty string)
• 0(as an integer)
• 0.0(o as a float)
• “0”(o as a string)
• Null
• False
• array() (an empty array)

• Next Interview Question

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Tutorials
PHP Variables

Exercises & Assignments
Write a program to print “Hello World” using echo
Write a program to print “Hello PHP” using variable
Write a program to print a string using echo+variable.
Write a program to print two variables in single echo

Interview Questions & Answers
How to check if a variable is empty in PHP?
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What are the different data types in PHP?