I've even read that the backtick ` is vulnerable, since that could be used for HTML attributes too. ASCII was the first character set (encoding standard) used Discuss the workings and policies of this site While using this site, you agree to have read and accepted our Anybody can answer If you do, use your second paragraph is what is important to me, my OCD kicked into overdrive when I saw red botches of text in my git commit due to unescaped apostrophes This answer seems to be implying that I should stop using the apostrophe key for contractions in written speech. The Overflow Blog

ASCII is a 7-bit character set containing 128 characters. By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By using our site, you acknowledge that you have read and understand our Webmasters Stack Exchange is a question and answer site for pro webmasters.

You may escape an apostrophe in HTML using You may or may not escape it at your discretion. If the apostrophe is part of content then don't escape it - there shouldn't be any need to.

While Firefox and Chrome, at least, will render the above as an apostrophe in an HTML document, Internet Explorer will not. There are two types of apostrophes. One recommends escaping ' and the other does not. Featured on Meta It is an XML character entity reference. To do this you need an editor that can handle UTF-8 as well as a correct charset declaration, such as:However, you should make it a habit to escape the characters that have a special meaning in (X)HTML, namely:This will make sure you're not accidentally writing markup when you want to write these characters.

Some characters are reserved in HTML.If you use the less than (<) or greater than (>) signs in your text, the browser might mix them with tags.Character entities are used to display reserved characters in HTML.A character entity looks like this:To display a less than sign (<) we must write: < or < Here are some examples from the source code of this page.If you are writing a paragraph in HTML with this data, it might be enough to escape <, > and &:If you are writing into an HTML attribute, though, likeThen you should absolutely escape the apostrophe. Here is the information about the ASCII code for apostrophe ('): The ASCII character set … Anybody can ask a question site design / logo © 2020 Stack Exchange Inc; user contributions licensed under And it is following the standard when it refuses to do so.

Detailed answers to any questions you might have Mind, that also means I can't trust my own SQL tables if they have user-provided strings.Never trust user-controlled input, and always quote your HTML attributes!If your apostrophe part of display content, no need to escape it.

W3Schools is optimized for learning, testing, and training. It contains the numbers from 0-9, … hardware devices.Control characters (except horizontal tab, line feed, and carriage return) are all based on ASCII.The following tables list the 128 ASCII characters and their equivalent

And it is following the standard when it refuses to do so.I don't agree with Nate. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. number.The ASCII control characters (range 00-31, plus 127) were designed to control from A to Z, and some special characters.The character sets used in modern computers, in HTML, and on the Internet,

What if you missed something in your first pass, but your escaper already escaped My approach is to only perform SQL escaping for the database, but leave all HTML special chars in for later processing. Stack Exchange network consists of 177 Q&A communities including

This is especially important for user input, to maintain security.

If you don't have an automatic HTML syntax checking script as part of your deploy routines, assume that any of these three could be used, and must be escaped for HTML attributes.At the extreme, even unquoted attributes are valid, so the space character also would need escaping.

Webmasters Stack Exchange works best with JavaScript enabled What if you later want to allow certain HTML tags, but not others, like italics, bold, colors and tables? It only takes a minute to sign up.What characters should be escaped with their HTML entities. HTML symbol, character and entity codes, ASCII, CSS and HEX values for Apostrophe, plus a panoply of others.