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WordPress – Create Nestable Shortcodes

Occasionally you might want to nest shortcodes inside each other. Consider the following example:

[eg-option label="3 Day Ticket" price="550"]
[eg-option label="1 Day Ticket" price="225"]

Here is the example

 * This function generates a shortcode that provides wrapper code for the nested shortcode
function eg_product($atts, $content=null) {
    $form   =  '<form method="post" action="">';
    // Assume we want to add incremental numbers in this example
    $form   .= '<input type="number" size="5" min="1" name="quantity" value="1" />';
    $form   .= '<select name="product">';
    // Need to apply_filters on the nested shortcode so that WordPress knows to parse shortcode as shortcode
    $form   .= apply_filters('the_content', $content);
    $form   .= '</select>';
    $form   .= '</form>';
    return $form;
add_shortcode( 'eg-product', 'eg_product' );
 * This function generates the shortcode that will be parsed inside the eg-product shortcode
function eg_option($atts, $content=null) {
    // Attributes added by shortcode
    $atts = shortcode_atts( array(
        'label'     => '',
        'price'     => ''
    ), $atts, 'eg-option' );
    // Output shortcode content
    return '<option value='.$atts['price'].'>'.$atts['label'].'</option>';
add_shortcode( 'eg-option', 'eg_option' );



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