Fix some misspellings

Zend/zend_exceptions.c

@@ -761,7 +761,7 @@ static const zend_function_entry zend_funcs_throwable[] = {
  * such exceptions in that handler.
  * Also all getXY() methods are final because thy serve as read only access to
  * their corresponding properties, no more, no less. If after all you need to
- * override somthing then it is method __toString().
+ * override something then it is method __toString().
  * And never try to change the state of exceptions and never implement anything
  * that gives the user anything to accomplish this.
  */