re.place is a module wich acts as a content filter. It searches for pre-defined 
regular expressions and replaces matches with pre-defined replacements.
It is possible to specify different replacements based on several 
“replacement restrictions” — for authenticated users and guests, 
for pages and non-pages currently (see “Screenshots”).
For example, you can implement the functionality of cross-linker module, while 
adding the possibility to insert “target” parameter, “rel=nofollow”, style 
information, etc.
As another example, you can insert in your posts custom smiles or the like.
As another example, you can add custom markup to you blog, like 
 Google(something) would insert link to <code>www.google.com/search?q=something</code>, 
 TouTube(youtube_id) will insert <code><object ...></code>, wich displays that video, 
etc-etc. See “Other notes” for more examples.
You can replace http links with some other stuff for guests, leaving as is for 
authenticated users (see https://wordpress.org/support/topic/297405).
Every entry can have custom “order” number, so you can chain your replacements.
re.place stores entries in database.
Management GUI provided to list entries, add, edit or delete entries.
See changelog for some changes tracking.
<h3>A brief examples</h3>
<ol>
<li>
As a search field, use ‘<code>_—</code>‘ (space in place of <code>_</code>!), 
as a replace — ‘<code>#160;—</code>‘. This will insert non-breaking space 
before every em-dash.
Mmm… You may wish even use ‘<code><span 
style="letter-spacing:0.1ex;">#160;—</code>‘ as a replase to insert 
narrower non-breaking space… If you love typography too much… And you 
can make space after dot wider…
</li>
<li>
Search for ‘<code>:-)</code>‘ and replace with:
‘<code><img src="http://www.kolobok.us/smiles/standart/smile3.gif"' . 
 'alt=":-)" title=":-) (nice smile -- http://www.kolobok.us/smiles/standart/smile3.gif)"' . 
 'style="vertical-align: middle;" /></code>‘
</li>
<li>
Search pattern: <code>YouTube\(([a-zA-Z_0-9\-]*)\)</code>
Replace pattern:
‘<code><object width="425" height="344" data="http://www.youtube.com/v/\1" type="application/x-shockwave-flash"> 
 <param name="movie" value="http://www.youtube.com/v/\1"></param> 
</object></code>‘
This will allow you to use markups like <code>YouTube(TMCf7SNUb-Q)</code> to insert 
Youtube video fragments easily.
</li>
<li>
How to Mass Remove Link (mass deactivate URL Linked text inside posts)? 
(https://wordpress.org/support/topic/288020)
Search pattern: <code><a [^>]*>([^<]*)<\/a></code>
Replace pattern: <code>\1</code>
This will “deactivate” all links in all posts 
(e.g. replace <code><a href="...">Try!</a></code> with just <code>Try!</code>). 
Note, you can activate them back, deactivating this <code>re.place</code> entry.
</li>
<li>
Want to insert drop caps easily?.. Use ‘<code><drop>L</drop>orem ipsum...</code>‘ in your 
posts and replace it with <code>\1</code>‘. Use angle brackets, 
and if you (accidentally) deactivate re.place, these “tags” won’t mess you page.
</li>
<li>
New — in v0.1.3 — [beta-] feature: you can specify different replace patterns 
for authenticated users and “guests”. Sorry, i’ll update screenshots and doc 
ASAP. 🙂
</li>
</ol>

re.place

re.place adds content filter wich searches in posts for specified patterns (regular expressions) and replaces matches found with specified strings.

mehdi jalili

The plugin provides an optimized replace function. It incorporates a dynamic real-time word/text replacing feature.
<h3>More Details</h3>
Ideal for bulk updates and site migrations, it offers powerful tools to find and replace any text and special characters across your website.
The real-time replacement employs an advanced word masking technique to search and replace text and special characters, leaving no trace behind. The find and replace process takes place before the website is 
rendered in the browser and does not impact any other files or databases. With this ultimate solution, replace the particular text you want in the header, body, footer credits, 
or any other content within your website without touching the database, with the help of an easy-to-use user interface.
<h3>Key Features</h3>
<ul>
<li>Entire Website – if you want to apply rules all over the website</li>
<li>Particular Page – if you want to apply rules on particular pages</li>
<li>Particular Post – if you want to apply rules on particular posts</li>
<li>Unicode – replace Unicode characters</li>
<li>Easy-to-use and user-friendly options</li>
<li>Replace any text without touching the database</li>
<li>Replace text loaded by Ajax/jQuery</li>
<li>Remove or change footer credit without touching the database or HTML code</li>
<li>Mask bad words posted in comments </li>
<li>Change different languages’ content to your own language</li>
<li>Real-time replace compatible with Gutenberg and other block/page builders</li>
<li>Ultimate easy solution to restore data you have replaced by mistake</li>
<li>Replace Unicode characters UTF-8 (e.g.: U+0026, REČA)</li>
<li>Easy to undo the changes by removing the specific rule</li>
</ul>
<h4>Questions and Feature Requests</h4>
<blockquote>
<h4>For quick support, feature requests, and bug reporting</h4>
<ul>
<li> For more dedicated support or feature requests, write to us at <a href="mailto:jalilimehdi.1366@gmail.com" rel="nofollow ugc">jalilimehdi.1366@gmail.com</a></li>
</ul>
<h4>As it’s open source, check our GitHub development status</h4>
<ul>
<li> Check development status or issues on <a href="https://github.com/mehdi-jalili/w-replace" rel="nofollow ugc">github.com/mehdi-jalili/w-replace</a></li>
</ul>
</blockquote>

Word Replace

Easily Replace text, footer credits, jQuery/Ajax loaded text or anything in real-time.

re.place vs Word Replace