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How to check for empty string in PHP ?

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  • Last Updated : 07 Oct, 2021

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

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