function ctools_math_expr_stack::pop

Remove the most recently pushed value and return it.

Return value

mixed|null The most recently pushed value, or NULL if the stack was empty.

File

includes/math-expr.inc, line 857

Class

ctools_math_expr_stack

Class implementing a simple stack structure, used by ctools_math_expr.

Code

public function pop() {
    if ($this->count > 0) {
        $this->count--;
        return $this->stack[$this->count];
    }
    return NULL;
}