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PHP | Ds\Collection isEmpty() Function
  • Last Updated : 21 Jan, 2019

The Ds\Collection::isEmpty() function is an inbuilt function in PHP which is used to returns whether collection is empty.

Syntax:

Ds\Collection::isEmpty ( void ) : bool

Parameters: This function does not accepts any parameters.

Return Value: It returns True if collection is empty or False otherwise.

Below programs illustrate the Ds\Collection::isEmpty() function in PHP:



Example 1:




<?php
  
// Create a collection
$collection = new \Ds\Vector([10, 15, 21, 13, 16, 18]);
  
// Use isEmpty function
$res = $collection->isEmpty();
  
// Display the result
var_dump($res);
  
// Create a collection
$collection = new \Ds\Vector();
  
// Use isEmpty function
$res = $collection->isEmpty();
  
// Display the result
var_dump($res);
?>

Output:

bool(false) 
bool(true) 

Example 2:




<?php
  
// Create a collection
$collection = new \Ds\Vector();
  
// display output
var_dump($collection->isEmpty());
  
// Create a collection
$collection = new \Ds\Vector([1, 3, 5, 2, 6]);
  
// Display output
var_dump($collection->isEmpty());
  
?>

Output:

bool(true) 
bool(false) 

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

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