我試圖盡可能地修改代碼，但我是初學者，任何幫助將不勝感激。啟動我的代碼時出現致命錯誤。此輸出有效public function renderMyBartag( $atts, $content = null ) {  extract( shortcode_atts( array(    'foo' => 'something',    'color' => '#FF0000'  ), $atts ) );  $content = wpb_js_remove_wpautop($content, true); // fix unclosed/unwanted paragraph tags in $content  $output = "<div style='color:{$color};' data-foo='${foo}'>{$content}</div>";  return $output;}這不public function renderMyBartag( $atts, $content = null ) {  extract( shortcode_atts( array(    'foo' => 'something',    'color' => '#FF0000'  ), $atts ) );  $content = wpb_js_remove_wpautop($content, true); // fix unclosed/unwanted paragraph tags in $content  $output = "<div class="container">    < class="learn-more">        <div class="circle">            <span class="icon arrow"></span>            </div>    <p class="button-text">{$foo}</p>     </button>    </div>";  return $output;}啟動我的代碼時出現致命錯誤。我只想將 html 代碼嵌入到我正在創建的短代碼中