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filter_listWe can display list of available filters by using filter_list function. This function returns an array with list of available filters as elements. Here is the example.
print_r(filter_list());
The output is here
Array ( [0] => int [1] => boolean [2] => float [3] => validate_regexp
[4] => validate_url [5] => validate_email [6] => validate_ip [7] => string
[8] => stripped [9] => encoded [10] => special_chars
[11] => full_special_chars [12] => unsafe_raw [13] => email
[14] => url [15] => number_int
[16] => number_float [17] => magic_quotes [18] => callback )
Now we will modify it by displaying in a formatted output.We used standard array display techniques to display the elements of the array
Here is the code to display output
$ar=filter_list();
while (list ($key, $val) = each ($ar)) {
echo "$key -> $val <br>";
}
The output is here ( Note that the serial number is the key number of the array filter_list not the filter ID number )
0 -> int
1 -> boolean
2 -> float
3 -> validate_regexp
4 -> validate_url
5 -> validate_email
6 -> validate_ip
7 -> string
8 -> stripped
9 -> encoded
10 -> special_chars
11 -> unsafe_raw
12 -> email
13 -> url
14 -> number_int
15 -> number_float
16 -> magic_quotes
17 -> callback
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