Use WP Shortcode as an attribute in another Shortcode - wordpress

Question

I'm trying to use the Advanced Custom Fields plugin shortcode as a attribute in another shortcode.
The company my theme was made by is not offering custom support at this time.
The original shortcode is made list this
public function plan( $atts, $content )
{
$html = array();
extract( shortcode_atts( array(
'price' => '',
'price_info' => '',
'type' => '',
'delay' => '',
'class' => '',
), $atts ) );
$html[] = '<div class="' . ( $class ) . '">';
$html[] = '<div class="plan has-animation" data-delay="' . ( (int)$delay ) . '">';
$html[] = '<div class="plan-container">';
$html[] = '<ins class="plan-price">' .( $price ) . '</ins>';
$html[] = '<span class="price-info">' . ( $price_info ) . '</span>';
$html[] = '<h2 class="second_color">' . ( $type ) . '</h2>';
$html[] = do_shortcode( $content );
$html[] = '</div>';
$html[] = '</div>';
$html[] = '</div>';
return implode("\n", $html);
}
And when i call the shortcode [pt_plan price="$12.99" price_info="per month" type="Standard" delay="400" class="col-lg-4 col-md-4 col-sm-4"] I want to make the price attribute allow a shortcode as a value to take advantage of Advanced Custom Fields.
However, if I place [acf field='session_price_1'] as the attribute value, like this, [pt_plan price="[acf field='session_price_1']" price_info="per month" type="Standard" delay="400" class="col-lg-4 col-md-4 col-sm-4"] it comes out as if that was a string and breaks the original pt_plan shortcode.
Could someone point me in the right direction? I thought it would be to add do_shortcode() to the $price variable in the plan shortcode, but it did not work.
Hope all this makes sense and thanks in advance!!

Answer 1

I actually got it to work.
Because the way shortcodes work in WP, the ending ] of the nested shortcode was closing off the original shortcode, screwing everything up.
To get around this, I did the following:
$html[] = '<div class="plan-price">'.do_shortcode('['.$price.']').'</div>';
and
[pt_plan price="acf field='session_price_1'" price_info="per month" type="Standard" delay="400" class="col-lg-4 col-md-4 col-sm-4"]
and that worked great!
Basically I just typed the text of the shortcode and ' instead of " into the attribute, concatenated the [ and ] in when it prints the attribute value into the , and used do_shortcode() to run the shortcode.