[SOLVED] Validation?

[random1]

I have a class that performs validation (isString, isBoolean etc):

 

....

 

// Checks the input data for consistency and correctness

function checkInput($variable)

{

  strip_tags($variable);

}

 

// Checks the output data for consistency and correctness

function checkOutput($variable)

{

  htmlspecialchars($variable);

  nl2br($variable);

}

 

How can I improve this code to:

 

1) Remove javascript tags

2) Remove HTML tags

3) Remove BB tags

4) Remove UBB tags

5) Clean the data completely

[phpQuestioner]

you could create a regex to identify and replace those tags.

[mr_mind]

The two functions below will make it able to go into the database and come out properly.

 

It will show the tags instead of having the tags parsed by the browser

 

<?php
function sanitize($str) {
	$str = htmlentities($str, ENT_NOQUOTES);
	$str = mysql_escape_string($str);
	return $str;
}
function desanitize($str) {
	$str = html_entity_decode($str, ENT_NOQUOTES);
	$str = stripslashes($str);
	$str = str_replace(array('<','>'), array('<', '>'), $str);
	return $str;
}
$string = "<strong> Hello World! </strong>";
print 'Original string: ' . $string . '<br />';
print 'Sanitized String: ' . sanitize($string) . '<br />';
print 'Desanitized String: ' . desanitize($string) . '<br />';
?>