What is the HTML entity for a search icon? [duplicate]

Question 1

HTML

Use 🔍 for 🔍 and 🔎 for 🔎

CSS (content string)

Use '\1F50D' for 🔍 and '\1F50E' for 🔎

As noted in comments, this depends on font and unicode support.

I suggest you stick with using an image or sprite sheet for this purpose to ensure that it's supported.

Update: Fonts

A new method for this is through the use of special font frameworks, which use a combination of web fonts and CSS helper classes. One example is Font Awesome (the example below uses the search icon):

<i class="fas fa-search" aria-hidden="true"></i>

Using this method has the benefit of having something that can be resized without a change in quality, as well as being subject to CSS rules like any other text, so rules like color and text-shadow can affect it.

Question 2

How about using css and html only? This is what I did (can be improved):

<!DOCTYPE html>
<html>
    <head>
        <meta charset= "UTF-8">
        <title> A css trick </title>
        <style type="text/css">
             body{
            background-size: 100%; 
            background-color: #000; 
            color: orange;
            font-size: 18px;
            margin: 0 auto;
            text-align: center;         
            }
            #search_box{width: 60px; position: relative; margin: 0 auto; transform: rotate(26deg)}
            #search{width:10px; height: 10px; border: 3px solid #f5f5f5; border-radius: 10px; float: left;}
            #cabe{width: 8px;display: block; border: 2px solid #fff;color: #f6f6f6; font-weight: bold; text-shadow: 2px 0px #fff; position: absolute; top: 6px; left: 13px; font-size: 16px; border-radius: 10px;}

        </style> 
    </head>
    <body>
        <h1>CSS TRICK</h1>
        <div id="search_box"><div id="search"></div><span id="cabe"></span></div>

    </body>  

</html>

Question 3

There is no HTML entity that could be reasonably regarded as denoting a “search icon”.

Depending on what you mean by “search icon”, there may or may not be a Unicode character that represents it. See Is there Unicode glyph Symbol to represent "Search". If there is, then it can be written as a character reference in HTML, though this is rather immaterial; the important thing is that most fonts would not contain it.