htmlentities and editing text

1. Is Htmlentities enough to prevent XSS?
2. How do you use Htmlentities?
3. What is the Htmlspecialchars () function describe at least three used of this function?
4. What is Ent_quotes?
5. What's the difference between Htmlentities () and htmlspecialchars ()?
6. Should I use Htmlspecialchars?
7. What converts special characters to HTML entities?
8. What is HTML entities used for?
9. What is a special character?
10. How do I get special characters in a URL?
11. How do you send a special character in a post request?

Is Htmlentities enough to prevent XSS?

htmlentities vs htmlspecialchars

Both will prevent XSS attacks. The difference is in the characters each encodes. htmlentities will encode ANY character that has an HTML entity equivalent. htmlspecialchars ONLY encodes a small set of the most problematic characters.

How do you use Htmlentities?

The htmlentities() function converts characters to HTML entities. Tip: To convert HTML entities back to characters, use the html_entity_decode() function. Tip: Use the get_html_translation_table() function to return the translation table used by htmlentities().

What is the Htmlspecialchars () function describe at least three used of this function?

The htmlspecialchars() function is used to converts special characters ( e.g. & (ampersand), " (double quote), ' (single quote), < (less than), > (greater than)) to HTML entities ( i.e. & (ampersand) becomes &amp, ' (single quote) becomes &#039, < (less than) becomes &lt; (greater than) becomes &gt; ).

What is Ent_quotes?

ENT_QUOTES is needed if the data is being substituted into an HTML attribute, e.g. echo '<input type="text" value="' . htmlentities($string, ENT_QUOTES) . ... This ensures that quotes are encoded, so they won't terminate the value="..." attribute prematurely.

What's the difference between Htmlentities () and htmlspecialchars ()?

htmlspecialchars() function convert the special characters to HTML entities. htmlentities() function convert all applicable characters to HTML entities.

Should I use Htmlspecialchars?

You use htmlspecialchars EVERY time you output content within HTML, so it is interperted as content and not HTML. If you allow content to be treated as HTML, you have just opened the door to bugs at a minimum, and total XSS hacks at worst. Save the exact thing that the user enters into the database.

What converts special characters to HTML entities?

The htmlspecialchars() function converts some predefined characters to HTML entities.

What is HTML entities used for?

An HTML entity is a piece of text ("string") that begins with an ampersand ( & ) and ends with a semicolon ( ; ) . Entities are frequently used to display reserved characters (which would otherwise be interpreted as HTML code), and invisible characters (like non-breaking spaces).

What is a special character?

: a symbol used in writing, typing, etc., that represents something other than a letter or number.

How do I get special characters in a URL?

Use URLEncoder to encode your URL string with special characters.
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2 Answers

1. The alphanumeric characters "a" through "z", "A" through "Z" and "0" through "9" remain the same.
2. The special characters ".", "-", "*", and "_" remain the same.
3. The space character " " is converted into a plus sign "+".

How do you send a special character in a post request?

In a http restful request, the http GET request must be url encoded, which means that most special characters must be encoded in a way understandable by a webserver. As such, characters such as the plus sign (+) or the question mark (?)