Syntax:

public DsDeque::pop (void): mixed

Parameters: this function takes no parameters.Return value:this function returns the last deleted item from Deque.The following programs illustrate the Ds function / Deque::pop()in PHP:Program 1:  
// Declare deque $deck = new DsDeque ([10, 20, 30, 40, 50, 60]); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
// last item in the deck echo ( "Last element of deque:" );  
// Use the pop() function to remove the last
// element from Deque and display it print_r ( $deck -> pop()); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
?> Exit:

Elements of Deque DsDeque Object ([0] = > 10 [1] = > 20 [2] = > 30 [3] = > 40 [4] = > 50 [5] = > 60) Last element of deque : 60 Elements of Deque DsDeque Object ([0] = > 10 [1] = > 20 [2] = > 30 [3] = > 40 [4] = > 50)

Program 2:  
// Declare deque $deck = new DsDeque ([ "engineer" , "for" , " engineer " , " practice " ]); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
// last item in the deck echo ( "Last element of deque:" );  
// Use the pop() function to remove the last
// element from Deque and display it print_r ( $deck -> pop()); echo ( " Elements of Deque " );  
// Show Deque elements print_r ( $deck );  
?> Exit:

Elements of Deque DsDeque Object ([0] = > engineer [1] = > for [2] = > engineer [3] = > practice) Last element of deque: practice Elements of Deque DsDeque Object ([0] = > engineer [1] = > for [2] = > engineer)

Link: http://php.net/manual/en/ds-deque.pop.php