How to check for empty string in PHP ?

0 0 1 minute read

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"; 
} 
  
?>