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
