如何使用PHP将数组从方法传递给属性

Question

Actually I want to change the color of current topic... Here is my CSS code:

.active{
    color: red;
    border-left: 1px solid red;
}

Also here is my PHP class:

class Languages
{
    public $active;
    public $data = '<div class="menu">
                        <ul>
                            <li $active["en"]>English</li>
                            <li $active["fr"]>French</li>
                        </ul>
                    </div>';

    function English()
    {
        // other codes
        $this->active["en"] = 'active';
        return $active;
    }

    function French()
    {
        // other codes
        $this->active["fr"] = 'active';
        return $active;
    }

}

But the above code does not work, why?! And how can I fix it?

Answer 1

There are a few issues with your code. Firstly, using single quotes (') instructs PHP to NOT interpolate values. Secondly, I suspect that your data value will never actually update as the values in $active change. Also, you should be using class="active" not simply adding the word 'active' into your li element. A more effective solution may be something like the following

class Languages
{
    public $active;

    function English()
    {
        // other codes
        $this->active["en"] = 'active';
        return $active;
    }

    function French()
    {
        // other codes
        $this->active["fr"] = 'active';
        return $active;
    }

    function data()
    {
        return = '<div class="menu">
                        <ul>
                            <li class="' . $this->active["en"] . '">English</li>
                            <li class="' . $this->active["fr"] . '">French</li>
                        </ul>
                        </div>';
    }

}

Then you can access the generated html by calling the $object->data() method and your generated HTML will always reflect the current values in $active. Alternatively you could still store $data as a member variable and simply have a function that regenerates it with new values such as function updateData().