<?php
/**
* This interface imposes a total ordering on the objects of each class that implements
* it. This ordering is referred to as the class's natural ordering, and the class's
* compareTo method is referred to as its natural comparison method
*/
interface Comparable {
/**
* Compares this object with the specified object for order. Returns a negative
* integer, zero, or a positive integer as this object is less than, equal to,
* or greater than the specified object
*
* @uses Compares this object with the specified object for order
* @param mixed $o - the object to be compared
* @return int a negative integer, zero, or a positive integer as this object is
* less than, equal to, or greater than the specified object
*/
public function compareTo($o);
/**
* Case Insensitive Comparator
* @param mixed $o - the object to be compared
* @return int a negative integer, zero, or a positive integer as this object is
* less than, equal to, or greater than the specified object
*/
public function compareToIgnoreCase($o);
}
?>
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