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PHP Ds / Deque filter () function

|
Syntax:
public DsDeque::filter ($callback): DsDeque
Parameters: This function takes one parameter, $callback, which is a callback function that contains the filter definition for the items from the queue.Return value:this function returns a new Deque that contains all values ​​for which the callback returns True, or all values ​​that convert to True if no callback was provided.The programs below illustrate the Ds / function Deque::filter()in PHP:Program 1: < ? php  
// Create a deck $deque = new DsDeque ([1, 2, 3, 4, 5, 6]); echo ( " Elements in the deque are " ); print_r ( $deque );  
// Use the filter() function to filter
// elements as required print_r ( $deque -> filter ( function ( $value ) { return $value % 2 == 0; }));  
?>
Exit:
Elements in the deque are DsDeque Object ([0] = > 1 [1] = > 2 [2] = > 3 [3] = > 4 [4] = > 5 [5] = > 6) DsDeque Object ([0] = > 2 [1] = > 4 [2] = > 6)
Program 2:  
// Deque creation $deque = new DsDeque ([10, 20, 3, 40, 50, 6]); echo ( " Elements in the deque are " ); print_r ( $deque );  
// Use the filter() function to filter
// elements as required print_r ( $deque -> filter ( function ( $value ) { return $value % 10! = 0; }));  
?>
Exit:
Elements in the deque are DsDeque Object ([0] = > 10 [1] = > 20 [2] = > 3 [3] = > 40 [4] = > 50 [5] = > 6) DsDeque Object ([0] = > 3 [1] = > 6)
Link: http://php.net/manual/en/ds-deque.filter.php

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