Hex codes must be prefixed with 0x. For example, the Greek letter Omega , has a Unicode value of 937. If you were to encode the HTML special characters, the encoded SQL statement would look like this: INSERT INTO ACCOUNTS (NAME, CITY) VALUES ('Some Valid Name', 'Scranton');DROP TABLE ACCOUNTS;SELECT * FROM ACCOUNTS WHERE NAME='') Because the single quote was encoded into ', the CITY parameter was treated as one big string. With comments you can place notifications and reminders in your HTML code: This can be helpful if you hide content temporarily: You can also hide more than one line. Comments can be used to hide parts in the middle of the HTML code. WebServer Side Learn SQL Learn MySQL Learn PHP Learn ASP Learn Node.js HTML Global Attributes HTML Events HTML Colors HTML Canvas HTML Audio/Video HTML Character Sets HTML Doctypes HTML URL Encode HTML Language Codes HTML Country Codes HTTP but is the value that is sent to the server on "submit" to identify There are certain requirements like, store HTML document into the text column, but unfortunately it also contains HTML tags which required to remove. The current implementation is quite basic, and is mainly intended for debugging purposes. For example \