Help filter the HTML and script tags.

I have my first php site runs fully almost ready to go live, except that I have not allowed for filtering of tags HTML and scripts from my forms, form fields, and the URL.

User input has been validated to match my criteria, values are escaped before the entry of the database.

I'm usually plans to use preg_match against different regex filter HTML and script tags and some of my forms that already have in place when you post (all the php) but for the rest of the filtering, I have some queries, concerns and questions about php filter_var for sanitation.

First of all:

My free text fields need work.

I need to allow users to be able to type a description of the use of General punctuation.

Would this work: (not sure if the regular expression is correct and if it isn't the best way to address filtering)

If isset Post textfield

allow only letters, numbers, General Liposuction and 265 character limit

$check = ' / ^ [a-zA-Z0 - 9\s.-,] {$1-265} / '.

{If (preg_match (& check, {$_GET ['textfield']}))}

allow

} else {...

Or is there a better way to do it with filter_var, this would allow users to type what they needed and just remove whatever it is a threat, such as:

If isset Post textfield

$var = $_POST ["textfield"]

(filter_var ($var, FILTER_SANITIZE_STRING);)

then check match my criteria

If ok enter the database

Second:

On the URL where the variables are passed is - that enough to filter variables using one of the methods above, this would actually use only a verification of the figures or letters of my variables (no punctuation). Or still is there a better way to do it with the filter_var: OR am I misunderstanding the filter_var function, it seems too easy is it really get rid all the bad things.

{if (isset($_GET['var1']))}

(filter_var ($var1, FILTER_SANITIZE_URL));

}

then continue with the code

Finally again to about the url, even though the variables are not passed when a page is loaded must I verify that the url is just the url? And how can I do this? Using filter_var?

As always, any help is very appreciated.

Thank you in advance.

Given that the information comes from the berries of $_GET and $_POST, use filter_input().

If you control $_POST ["textfield"]:

$sanitized = filter_input(INPUT_POST, 'textfield', FILTER_SANITIZE_STRING);

$sanitized contains the string stripped of all tags.

If you are var1 through the table control $_GET:

$clean_var1 = filter_input(INPUT_GET, 'var1', FILTER_SANITIZE_STRING);

Tags: Dreamweaver

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