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vendor/yiisoft/yii2/widgets/Spaceless.php 1.95 KB
abf1649b   andryeyev   Чистая установка ...
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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="navbar"><!-- other tags --></div><div class="content"><!-- other 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()));
      }
  }