Make a register page

In my register page I used different php functions to build up:

Firstly, connecting to database hosting which is initilized in config.php

require_once ('../../library/config.php');

then making function for string variable.

mysql_real_escape_string — Escapes special characters in a string for use in a SQL statement.
addslashes — Quote string with slashes.
strip_tags — Strip HTML and PHP tags from a string.

function protect ($string)
{
$string = mysql_real_escape_string ($string);
$string = strip_tags ($string);
$string = addslashes ($string);
return $string;
}

Next, process the form when user click on submit button



Checking data when processing the form





I repeat a register form which will appear the same time with all errors



If there is errror messages when validating all input data, then INSERT input data into hosting database.



When I am testing the register page, I archived some result: