php - How to remove single and double quotes from a string

Question

When I run a phrase that contains double quotes through this function, its replacing the quotes with quot.

I want to completely remove them (also single quotes). How can I alter the function to do that?

function string_sanitize($s) {
    $result = preg_replace("/[^a-zA-Z0-9]+/", "", $s);
    return $result;
}

Update:

Example 1: This is 'the' first example 
returns: Thisis030the039firstexample 
Errors: Warning: preg_match_all() [function.preg-match-all]: Unknown modifier '0' in C


Example 2: This is my "second" example
returns: Thisismyquotsecondquotexample
Errors: Invalid express in Xpath

Answer 1

I would not call that function string_sanitize(), as it is misleading. You could call it strip_non_alphanumeric().

Your current function will strip anything that isn't an upper or lowercase letter or a number.

You can strip just ' and " with...

$str = str_replace(array(''', '"'), '', $str);