How to check whether an array is empty using PHP?
Given an array and the task is to check whether the array is empty or not using PHP.
Below are the approaches to check whether an array is empty or not using PHP:
Table of Content
Using empty() Function
This function determines whether a given variable is empty. This function does not return a warning if a variable does not exist.
Example: In this example, we are using the empty() function.
<?php
// Declare an array and initialize it $non_empty_array =
//array('URL' => 'https://www.geeksforgeeks.org/');
// Declare an empty array
$empty_array = array();
// Condition to check array is empty or not
if(!empty($non_empty_array))
echo "Given Array is not empty <br>";
if(empty($empty_array))
echo "Given Array is empty";
?>
Output
Given Array is empty
Using count() Function
This function counts all the elements in an array. If number of elements in array is zero, then it will display empty array.
Example: In this example, we are using the count() function.
<?php
// Declare an empty array
$empty_array = array();
// Function to count array
// element and use condition
if(count($empty_array) == 0)
echo "Array is empty";
else
echo "Array is non- empty";
?>
Output
Array is empty
Using sizeof() function
This method check the size of array. If the size of array is zero then array is empty otherwise array is not empty.
Example: In this example, we are using the sizeof() function.
<?php
// Declare an empty array
$empty_array = array();
// Use array index to check
// array is empty or not
if( sizeof($empty_array) == 0 )
echo "Empty Array";
else
echo "Non-Empty Array";
?>
Output
Empty Array
Using not (!) operator
In this method, we are checking whether the given array is empty or not by using not operator.
Example: In this example, we are using the not operator.
<?php
// Declare an empty array
$empty_array = array();
// Use array index to check
// array is empty or not
if( ! $empty_array)
echo "Empty Array";
else
echo "Non-Empty Array";
?>
Output
Empty Array
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