special-characters - w3toppers.com

What is the difference between \r and \n?

They’re different characters. \r is carriage return, and \n is line feed. On “old” printers, \r sent the print head back to the start of the line, and \n advanced the paper by one line. Both were therefore necessary to start printing on the next line. Obviously that’s somewhat irrelevant now, although depending on the … Read more

In PHP when submitting strings to the database should I take care of illegal characters using htmlspecialchars() or use a regular expression?

There are no “illegal” characters for the database. Database that cannot store some characters is a nonsense. There are some service characters, like quotes, used to delimit strings. These characters should be just escaped, not eliminated. To send a query to the database, you have 2 options: Build a query usual way, to make it … Read more