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English:
This plugin to select blocks of code takes advantage of JavaScript-library ‘google-code-prettify’. If it is for his work simply insert frame <pre> tag with class ‘prettyprint’.
*** Tip: In order to optimize the use of resources, try to use only one option – ‘Automatically replace the tags <pre> to <pre class=”prettyprint linenums”> before saving post.’
Russian:
Данный плагин для выделения блоков кода использует возможности JavaScript-библиотеки ‘google-code-prettify’. При это для его работы достаточно просто обрамлять вставки тегом <pre> с классом ‘prettyprint’.
***Совет: в целях оптимизации потребления ресурсов старайтесь использовать только 1 флажок – ‘Автоматически заменять <pre> на <pre class=”prettyprint linenums”> перед сохранением записи.’

Code Prettify Syntax Highlighter

Highlighting the code in the post with JavaScript library «google-code-prettify».

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This plugin will add a button to both the visual and HTML WordPress Editor panel allowing you to easily insert code for WP-Syntax. WP-Syntax is a syntax highlighting plugin for WordPress which can be downloaded from https://wordpress.org/extend/plugins/wp-syntax/
Usage
<ol>
<li>Select the text you want to have highlighted by WP-Syntax</li>
<li>Click the button pre (WP-Syntax) in HTML editing mode or the icon with colored lines in visual editing mode</li>
<li>Enter the language and starting line separated by a comma. The later is optional.</li>
</ol>

WP-Syntax Editor Integration Plugin

Adds new buttons to the visual and html editor window which allow to use WP-Syntax.

Code Prettify Syntax Highlighter vs WP-Syntax Editor Integration Plugin