The Ds\Stack::clear() function of PHP is used to remove all elements from a Stack and clear it. This function simply removes all of the elements from the Stack but not completely deletes it. It just empties it.
Syntax:
void public Ds\Stack::clear ( void )
Parameters: This function does not accept any parameters.
Return Value: This function does not return any value.
Below programs illustrate the Ds\Stack::clear() function:
Program 1:
PHP
<?php // PHP program to illustrate the // Ds\stack::clear() function // Create a Stack instance $stack = new \Ds\Stack();
// Pushing elements to Stack $stack ->push( "Welcome" );
$stack ->push( "to" );
$stack ->push( "GfG" );
// Print the stack print_r( $stack );
// clear the stack $stack ->clear();
// Print the stack again print_r( $stack );
?> |
Output:
Ds\Stack Object ( [0] => GfG [1] => to [2] => Welcome ) Ds\Stack Object ( )
Program 2:
PHP
<?php // PHP program to illustrate the // Ds\stack::clear() function // Create a Stack instance $stack = new \Ds\Stack();
// Pushing Mixed value elements to Stack $stack ->push( "Welcome" );
$stack ->push( "to" );
$stack ->push( "GfG" );
$stack ->push(10);
$stack ->push(5.5);
// Print the stack print_r( $stack );
// clear the stack $stack ->clear();
// Print the stack again print_r( $stack );
?> |
Output:
Ds\Stack Object ( [0] => 5.5 [1] => 10 [2] => GfG [3] => to [4] => Welcome ) Ds\Stack Object ( )
Reference: http://php.net/manual/en/ds-stack.clear.php