How to check for empty string in PHP ?

In this article, we will see how to check for empty string in PHP. String is a set of characters. A string is said to be empty, if it contains no characters. We can use empty() function to check whether a string is empty or not.

The function is used to check whether the string is empty or not. It will return true if the string is empty.

Syntax:

bool empty(string)

Parameter: Variable to check whether it is empty or not.

Return Value: If string is empty, it returns true and false otherwise.

Example 1: PHP program to check whether the string is empty or not.

PHP

<?php

// Consider a string which is empty
$s = "";

// Return a message if string is empty
if(empty($s)) {
    echo "Empty string";
}
else {
    echo "Not empty";
}

?>

Output

Empty string

Example 2:

PHP

<?php

// Consider a string which is not empty
$s = "Welcome to GFG";

// Return a message if string is empty
if(empty($s)) {
    echo "Empty string";
}
else {
    echo "Not empty";
}

?>

Output

Not empty