PHP Battalion示例

示例#1

文件： late_static_binding.php 项目： alexprather/aca

<?php

class Army
{
    public static $strength = 20;
    public static function getStrength()
    {
        return static::$strength;
        // this is late static binding
        // this says if child classes have the property, use child, if not, use parent
    }
}
class Battalion extends Army
{
    public static $strength = 10;
}
class Unit extends Battalion
{
    public static $strength = 5;
}
echo 'Army strength: ' . Army::getStrength() . '<br>';
echo 'Battalion strength: ' . Battalion::getStrength() . '<br>';
echo 'Unit strength: ' . Unit::getStrength() . '<br>';

示例#2

文件： late_static_binding.php 项目： hwaunhwan/PHPIntermediate

<?php

class Army
{
    public static $strength = 20;
    public static function getStrength()
    {
        return static::$strength;
        // will check child class first then parent class
        //This is called late static binding
        //return self::$strength; will renter 20 for battalion
    }
}
class Battalion extends Army
{
    public static $strength = 10;
}
echo 'Army strength: ' . Army::getStrength() . "<br/>";
echo 'Battalion strength: ' . Battalion::getStrength() . "<br/>";
//Batallion str is 10 but it will render 20 because it will render the parent static as the default
//
class Unit extends Battalion
{
    public static $strength = 5;
}
echo 'Unit strength: ' . Unit::getStrength() . "<br/>";