Escaping / encoding data before insert into a database?

1. How do I escape data before storing it in the database?
2. Should I encode HTML?
3. When should you escape data?
4. What does it mean to escape user input?
5. How do I encode a URL?
6. Do you need to escape in HTML?
7. How do you escape HTML encoding?
8. What is encode data on output?
9. Why do we encode output?
10. What is the difference between encoding and escaping?

How do I escape data before storing it in the database?

addslashes function enables us to escape data before storage into the database.

Should I encode HTML?

Don't HTML-encode your characters before storage. You should store as pure a form of your data as possible. HTML encoding is needed because you are going to display the data on an HTML page, so do the encoding during the processing of the data to create the page.

When should you escape data?

Escaping is the process of securing output by stripping out unwanted data, like malformed HTML or script tags, preventing this data from being seen as code. Escaping helps secure your data prior to rendering it for the end user and prevents XSS (Cross-site scripting) attacks.

What does it mean to escape user input?

User input is a string. Escaping is done when you want to insert some characters into some HTML / SQL / Whatever code which insists on interpreting some characters into special functionalities.

How do I encode a URL?

URL Encoding (Percent Encoding)

URLs can only be sent over the Internet using the ASCII character-set. Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format. URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits.

Do you need to escape in HTML?

In general, you should not escape spaces as   .   is not a normal space, it's a non-breaking space. You can use these instead of normal spaces to prevent a line break from being inserted between two words, or to insert extra space without it being automatically collapsed, but this is usually a rare case.

How do you escape HTML encoding?

These are used to escape characters that are markup sensitive in certain contexts:

1. & → & (ampersand, U+0026)
2. &lt; → < (less-than sign, U+003C)
3. &gt; → > (greater-than sign, U+003E)
4. &quot; → " (quotation mark, U+0022)
5. &apos; → ' (apostrophe, U+0027)

What is encode data on output?

Output encoding is the process of replacing HTML control characters (e.g. <, >, ", &, etc) into their encoded representatives. This is the best mitigtion against cross-site scripting attacks. Different contexts require different encoding types. Fortunately, there are two libraries out there to help you out.

Why do we encode output?

The purpose of output encoding is to convert untrusted input into a safe form where the input is displayed as data to the user without executing as code in the browser or in simple words , Encoding involves translating special characters into some equivalent that is no longer significant in the target interpreter.

What is the difference between encoding and escaping?

And what's the difference between escaping and encoding ? Encoding is transforming data from one format into another format. Escaping is a subset of encoding, where not all characters need to be encoded. Only some characters are encoded (by using an escape character).