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- <?php
- /**
- * @link http://www.yiiframework.com/
- * @copyright Copyright (c) 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
- */
-
- namespace yii\widgets;
-
- use yii\base\Widget;
-
- /**
- * Spaceless widget removes whitespace characters between HTML tags. Whitespaces within HTML tags
- * or in a plain text are always left untouched.
- *
- * Usage example:
- *
- * ```php
- * <body>
- * <?php Spaceless::begin(); ?>
- * <div class="nav-bar">
- * <!-- tags -->
- * </div>
- * <div class="content">
- * <!-- tags -->
- * </div>
- * <?php Spaceless::end(); ?>
- * </body>
- * ```
- *
- * This example will generate the following HTML:
- *
- * ```html
- * <body>
- * <div class="nav-bar"><!-- tags --></div><div class="content"><!-- tags --></div></body>
- * ```
- *
- * This method is not designed for content compression (you should use `gzip` output compression to
- * achieve it). Main intention is to strip out extra whitespace characters between HTML tags in order
- * to avoid browser rendering quirks in some circumstances (e.g. newlines between inline-block elements).
- *
- * Note, never use this method with `pre` or `textarea` tags. It's not that trivial to deal with such tags
- * as it may seem at first sight. For this case you should consider using
- * [HTML Tidy Project](http://tidy.sourceforge.net/) instead.
- *
- * @see http://tidy.sourceforge.net/
- * @author resurtm <resurtm@gmail.com>
- * @since 2.0
- */
- class Spaceless extends Widget
- {
- /**
- * Starts capturing an output to be cleaned from whitespace characters between HTML tags.
- */
- public function init()
- {
- ob_start();
- ob_implicit_flush(false);
- }
-
- /**
- * Marks the end of content to be cleaned from whitespace characters between HTML tags.
- * Stops capturing an output and echoes cleaned result.
- */
- public function run()
- {
- echo trim(preg_replace('/>\s+</', '><', ob_get_clean()));
- }
- }
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