The Ds\Collection::copy() function is an inbuilt function in PHP which is used to returns the copy of collection element.
Syntax:
Ds\Collection::copy ( void ) : Ds\Collection
Parameters: This function does not accept any parameter.
Return Value: It returns the copy of collection element.
Below programs illustrate the Ds\Collection::copy() function in PHP:
Example 1:
<?php // Create a collection $collection = new \Ds\Vector([10, 15, 21, 13, 16, 18]); // Display the collection element print_r($collection); // Use copy() function to remove elements $collection->copy(); // Display the collection element print_r($collection); ?> |
Output:
Ds\Vector Object (
[0] => 10
[1] => 15
[2] => 21
[3] => 13
[4] => 16
[5] => 18
)
Ds\Vector Object (
[0] => 10
[1] => 15
[2] => 21
[3] => 13
[4] => 16
[5] => 18
)
Example 2:
<?php // Create a collection $collection = new \Ds\Vector([10, 15, 21, 13, 16, 18]); // Display the collection element print_r($collection); // Use copy() function to remove elements $collection->copy(); // Pop an element from collection $collection->pop(); // Display the collection element print_r($collection); ?> |
Output:
Ds\Vector Object (
[0] => 10
[1] => 15
[2] => 21
[3] => 13
[4] => 16
[5] => 18
)
Ds\Vector Object (
[0] => 10
[1] => 15
[2] => 21
[3] => 13
[4] => 16
)
Reference: http://php.net/manual/en/ds-collection.copy.php
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