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PHP Ds / Stack peek () function

Syntax:
mixedpublic DsStack::peek (void) 
Parameters: this function takes no parameters.Return value:This function returns the element at the top of the stack.The following programs illustrate the function Ds / Stack::peek()in PHP:Program 1:  
// PHP illustration program
// peek() function 
// Create a stack instance $stack = new DsStack();  
// Push items onto the stack $stack -> push ( "Welcome" ); $stack -> push ( "to" ); $stack -> push ( "GfG" );  
// Print top element print_r ( $stack -> peek());  
?>
Output:
GfG 
Program 2:  
// PHP illustration program
// peek() function 
// Create a stack instance $stack = new DsStack();  
// Put elements with mixed values ​​on the stack $stack -> push ( "Welcome" ); $stack -> push ( "to" ); $stack -> push ( "GfG" ); $stack -> push (10); $stack -> push (5.5);  
// Print top element print_r ( $stack -> peek());  
?>
Output:
5.5 
Link : http://php.net/manual/en/ds-stack.peek.php

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