How to check if a Set is Empty in PHP

How to check if a Set is Empty in PHP ?

Answer

To check if a Set is empty in PHP, you can use the empty() function or check the size of the Set using the count() function.

✐ Examples

1 Check if Set is Empty using empty()

In this example,

We declare a Set named $set and initialize it with some elements, or an empty Set if there are no elements.
We use the empty() function to check if the Set $set is empty.
If the Set is empty, the empty() function returns true; otherwise, it returns false.
We print the result to the standard output to indicate whether the Set is empty or not.

PHP Program

<?php
$set = new Set(); // Or new Set(['a', 'b', 'c']) for a non-empty Set
$isEmpty = empty($set);
if ($isEmpty) {
    echo 'The Set is empty';
} else {
    echo 'The Set is not empty';
}
?>

Output

The Set is empty

2 Check if Set is Empty using count()

In this example,

We declare a Set named $set and initialize it with some elements, or an empty Set if there are no elements.
We use the count() function to get the number of elements in the Set $set.
If the count is 0, it means the Set is empty.
We print the result to the standard output to indicate whether the Set is empty or not.

PHP Program

<?php
$set = new Set(); // Or new Set(['a', 'b', 'c']) for a non-empty Set
$isEmpty = count($set) === 0;
if ($isEmpty) {
    echo 'The Set is empty';
} else {
    echo 'The Set is not empty';
}
?>

Output

The Set is empty

Summary

In this tutorial, we learned How to check if a Set is Empty in PHP language with well detailed examples.

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How to check if a Set is Empty in PHP

How to check if a Set is Empty in PHP ?

Answer

✐ Examples

1 Check if Set is Empty using empty()

PHP Program

Output

2 Check if Set is Empty using count()

PHP Program

Output

Summary

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