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