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 accepts any parameters.
Return Value: This function does not returns any value.
Below programs illustrate the Ds\Stack::clear() function:
Program 1:
<?php // PHP program to illustarte the // 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 program to illustarte the // 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
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