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