Scott Reilly

This plugin allows you to easily define text or HTML that should be used in your posts in place of words or phrases that are actually present in the posts. This is a handy technique for creating shortcuts to common, lengthy, or frequently changing text/HTML, or for smilies.
Additional features of the plugin controlled both via settings and filters:
<ul>
<li>Text replacement can be enabled for comments (it isn’t by default)</li>
<li>Text replacement can be made case insensitive (it is case sensitive by default)</li>
<li>Text replacement can be limited to doing only one replacement per term, per post (by default, all occurrences of a term are replaced)</li>
<li>Text replacement can be handled early or late in WordPress’s text filtering process (it’s early by default)</li>
<li>Text replacement can be expanded to affect other filters</li>
</ul>
A few things to keep these things in mind:
<ul>
<li>
Your best bet with defining shortcuts is to define something that would never otherwise appear in your text. For instance, bookend the shortcut with colons:
:wp: => <a href='https://wordpress.org' rel="ugc">WordPress</a> 
:aol: => <a href='http://www.aol.com' rel="nofollow ugc">America Online, Inc.</a>
</li>
</ul>
Otherwise, you risk proper but undesired replacements:
<pre><code>Hi => Hello
</code></pre>
Would have the effect of changing “His majesty” to “Hellos majesty”.
<ul>
<li>
If you intend to use this plugin to handle smilies, you should probably disable WordPress’s default smilie handler on the Writing Settings admin page.
</li>
<li>
This plugin is set to filter ‘the_content’, ‘the_excerpt’, ‘widget_text’, and optionally, ‘get_comment_text’ and ‘get_comment_excerpt’. Filters from popular plugins such as Advanced Custom Fields (ACF) and Elementor are also handled by default (see FAQ for specifics). The “More filters” setting can be used to specify additional filters that should be handled by the plugin. The filter ‘c2c_text_replace_filters’ can also be used to add or modify the list of filters affected.
</li>
<li>
Text inside of HTML tags (such as tag names and attributes) will not be matched. So, for example, you can’t expect the :mycss: shortcut to work in <code><a href="" style=":mycss:">text</a></code>
</li>
<li>
SPECIAL CONSIDERATION: Be aware that the shortcut text that you use in your posts will be stored that way in the database. While calls to display the posts will see the filtered, text-replaced version, anything that operates directly on the database will not see the expanded replacement text. So if you only ever referred to “America Online” as “:aol:” (where <code>:aol: => <a href='http://www.aol.com'>America Online</a></code>), visitors to your site will see the linked, expanded text due to the text replace, but a database search would never turn up a match for “America Online”.
</li>
<li>
However, a benefit of the replacement text not being saved to the database and instead evaluated when the data is being loaded into a web page is that if the replacement text is modified, all pages making use of the shortcut will henceforth use the updated replacement text.
</li>
</ul>
Links: <a href="https://coffee2code.com/wp-plugins/text-replace/" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/plugins/text-replace/" rel="ugc">Plugin Directory Page</a> | <a href="https://github.com/coffee2code/text-replace/" rel="nofollow ugc">GitHub</a> | <a href="https://coffee2code.com" rel="nofollow ugc">Author Homepage</a>
<h3>Developer Documentation</h3>
Developer documentation can be found in <a href="https://github.com/coffee2code/text-replace/blob/master/DEVELOPER-DOCS.md" rel="nofollow ugc">DEVELOPER-DOCS.md</a>. That documentation covers the numerous hooks provided by the plugin. Those hooks are listed below to provide an overview of what’s available.
<ul>
<li><code>c2c_text_replace_filters</code> : Customize what hooks get text replacement applied to them.</li>
<li><code>c2c_text_replace_third_party_filters</code> : Customize what third-party hooks get text replacement applied to them.</li>
<li><code>c2c_text_replace_filter_priority</code> : Override the default priority for the ‘c2c_text_replace’ filter.</li>
<li><code>c2c_text_replace</code> Customize or override the setting defining all of the text replacement shortcuts and their replacements.</li>
<li><code>c2c_text_replace_comments</code> : Customize or override the setting indicating if text replacement should be enabled in comments.</li>
<li><code>c2c_text_replace_case_sensitive</code> : Customize or override the setting indicating if text replacement should be case sensitive.</li>
<li><code>c2c_text_replace_once</code> : Customize or override the setting indicating if text replacement should be limited to once per term per piece of text being processed regardless of how many times the term appears.</li>
</ul>

Text Replace

Replace text with other text. Handy for creating shortcuts to common, lengthy, or frequently changing text/HTML, or for smilies.

ShippeR

Plugin contains a complete system for evaluating contests. It allows you create tasks queue for future days (such as task-1 for first week, task-2 for weekend etc.).
Tasks changing is based on date. Once you set parameters and you no longer have to worry about anything. All is doing automatically.
When one task expirate, next task is followed and summary email is sended to you with results. You can manualy confirm user answer, if you think it’s right. No problem, only hit one button.
<h4>Creating tasks</h4>
It’s absolutely easy.
<ol>
<li>Go to admin menu on page Encryption contest and hit create new task. </li>
<li>Fill expirate date (from – to) with right solution, what user should answer. </li>
<li>Choose code from checkbox and save it.</li>
</ol>
<h4>Interface</h4>
First one is front-end created by shortcode <code>[encryption-contest]</code>. You can place it on any page and user can start it using immediately. There is set one default Task for your inspiration, how does it works.
Second interface is options page Encryption contest. This page is for administrators only and you will visit that only once for general settings. There you can manage data displayed in frontend (if countdown should be displayed etc). You can manage capatibility, what user need for creating tasks, it means that plugin isn’t limited only to admins. It depend’s on your settings.
Thirth interface is admin menu page Encryption contest. This is place, where you can create or edit all Tasks for users. It’s simply. Admin insert text, what user should answer and plugin will compare it with user answer. If text from admin is similar with text from user, user will be automatically set as right solution.
<h4>Codes to use</h4>
Plugin consists of eight most used codes in general public. If you create your task with this prepared codes, many people it can encrypt. Predefined codes are:
<ul>
<li>Move letter about X in alphabet</li>
<li>Text backwards with random gaps</li>
<li>Every second letter</li>
<li>Substitution behind the numbers Z = 26</li>
<li>Snail from center</li>
<li>Great poland cross</li>
<li>Morse code</li>
<li>Reverse Morse code</li>
</ul>
Of course this plugin contain way to insert your own cyphre. It can be text or just image. If you want make any complex cyphre, this is only way. You must translate to code manually.
<h4>Multilangual</h4>
This plugin is fully prepared for translation. Actually are supported languages:
<ul>
<li>English</li>
<li>Czech</li>
</ul>

Encryption contest

This plugin allows you create competition based on time for all logged users.

Text Replace vs Encryption contest