PHP | Ds\Collection clear() Function

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The Ds\Collection::clear() function is an inbuilt function in PHP which is used to remove all values from the collection.

Syntax:

Ds\Collection::clear( void )

Parameters: This function does not accepts any parameters.

Return Value: This function does not return any value.

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

Example 1:

<?php 
  
// Create a collection 
$collection = new \Ds\Vector([1, 2, 3, 4, 5, 6]); 
  
// Display the collection element 
print_r($collection); 
  
// Use clear() function to remove elements 
$collection->clear(); 
  
// Display the collection element 
print_r($collection); 
  
?> 

Output:

Ds\Vector Object ( 
    [0] => 1 
    [1] => 2 
    [2] => 3 
    [3] => 4 
    [4] => 5 
    [5] => 6 
)
Ds\Vector Object ( 
)

Example 2:

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

Output:

object(Ds\Vector)#1 (6) { 
    [0]=> int(10) 
    [1]=> int(15) 
    [2]=> int(21) 
    [3]=> int(13) 
    [4]=> int(16) 
    [5]=> int(18) 
} 
object(Ds\Vector)#1 (0) { 

}

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