Custom template tag for formating an ACF date field.php

/*** Custom template tag for styling an ACF date field
Tag format: {{dateformat.field_name|D M j}}
–––––––––––––––––––––––––––––––––––––––––––––––––– ***/
add_filter("render_block", "wsv_date_format_tags", 11, 2); // Note the priority is set to 11, to ensure it runs after tct_template_tags

function wsv_date_format_tags($block_content, $block) {
    // Updated pattern to allow a broader range of characters in the format, including commas, spaces, and common date format characters
    $pattern = "/{{dateformat\.([\w-]+)\|([,\w\s-]+)}}/";

    $new_content = preg_replace_callback($pattern, function ($matches) {
        if (!function_exists("get_field")) return $matches[0]; // Ensure ACF is active

        $field_name = trim($matches[1]);
        $format = $matches[2];
        $field_value = get_field($field_name);

        // Attempt to convert the ACF field value to a DateTime object
        if ($field_value && ($date = DateTime::createFromFormat('Ymd', $field_value))) {
            // If conversion is successful and a format is specified, format the date
            return $date->format($format);
        }

        // If conversion fails or there's no field value, return original tag (or consider returning an empty string or a fallback message)
        return $matches[0];
    }, $block_content);

    return $new_content;
}