PHP SplHeap isEmpty() Function

PHP | Ds\Vector isEmpty() Function

Last Updated : 22 Aug, 2019

The Ds\Vector::isEmpty() function is an inbuilt function in PHP which is used to check the vector is empty or not. Syntax:

bool public Ds\Vector::isEmpty( void )

Parameters: This function does not accept any parameter. Return Value: This function returns true if the vector is empty, false otherwise. Below programs illustrate the Ds\Vector::isEmpty() function in PHP: Program 1:

PHP

<?php

// Create new vector
$vector = new \Ds\Vector([1, 2, 4, 5]);

// Use isEmpty() function to
// check vector
var_dump($vector->isEmpty());

// Use clear() function to remove
// vector elements
$vector->clear();

// Use isEmpty() function
var_dump($vector->isEmpty());

?>

Output:

bool(false)
bool(true)

Program 2:

PHP

<?php

// Create new vector
$vector = new \Ds\Vector(["geeks", "for", "geeks"]);

// Use isEmpty() function to
// check vector
var_dump($vector->isEmpty());

// Use clear() function to remove
// vector elements
$vector->clear();

// Use isEmpty() function
var_dump($vector->isEmpty());

?>

Output:

bool(false)
bool(true)

Reference: http://php.net/manual/en/ds-vector.isempty.php

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