Dynamically name array in Wordpress loop - add/get values

Question

I have a page set up like Page One, Page Two, Page Three

Each page has a tag of 'content'.

In the Wordpress loop I would like to create an array for each page with the page title as the array name.

I would then like to add and get values from the array using the array name.

I have some demo code here.

If I try to get the length of the array using the array name it returns '0' and the keys/values are not returned.

    <?php
        $mt_test_args = array(
            'post_type' => 'page',
            'tag' => 'content',
            'order' => 'ASC'
        );

        $mt_test_loop = new WP_Query($mt_test_args);

        if($mt_test_loop->have_posts()):
            while($mt_test_loop->have_posts()):
                $mt_test_loop->the_post();  

        // create array for each page   
        $arr_name = get_the_title();
        $arr_name = str_replace(' ','_',$arr_name);
        $$arr_name = array();// The page array

        // Add text and color keys to array
        $$arr_name[$text] = 'Page Text';
        $$arr_name[$color] = 'red';

    ?>  

    <option><?php the_title(); ?></option>

    <?php endwhile; endif; ?>

    <?php wp_reset_postdata(); ?>

    <?php 
        print_r($Page_One);
        echo count($Page_One); // no echo
        echo $Page_One[$text]; // no value
    ?>

Answer 1

From the PHP manual:

Variable names follow the same rules as other labels in PHP. A valid variable name starts with a letter or underscore, followed by any number of letters, numbers, or underscores. As a regular expression, it would be expressed thus: '[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*'

Hence before diving into your code further:

1. It would need much more than $arr_name = str_replace(' ','_',get_the_title()); to make this fail-safe. Currently, your code is bound to fail as soon as the page title contains any non-alphanumeric characters.

2. Because of the above, among other reasons, I'd strongly suggest you reconsider the general architectural approach. Ask yourself this: Why would you need variable variable in the first place? (I don't see a reason and I doubt this to be the most viable solution, even if a valid reason exists.)