filter_id - PHP

filter_id

WE can get the filter id of the particular filter in PHP by using filter_id function. We will input the name of the filter and get the associated id of it. The list containing name of filter is available at filter_list page. Here is the syntax.

Int filter_id(filter name)

Here is one example echo filter_id('validate_url'); The output of above line is here

273

We can also display the associated id of all the filters in a single list. Here is the sample code.

$ar=filter_list();
while (list ($key, $val) = each ($ar)) {
echo "$key -> $val : ( ".filter_id($val). " ) <br>";
} 

The output is here

0 -> int : ( 257 ) 
1 -> boolean : ( 258 ) 
2 -> float : ( 259 ) 
3 -> validate_regexp : ( 272 ) 
4 -> validate_url : ( 273 ) 
5 -> validate_email : ( 274 ) 
6 -> validate_ip : ( 275 ) 
7 -> string : ( 513 ) 
8 -> stripped : ( 513 ) 
9 -> encoded : ( 514 ) 
10 -> special_chars : ( 515 ) 
11 -> full_special_chars : ( 522 ) 
12 -> unsafe_raw : ( 516 ) 
13 -> email : ( 517 ) 
14 -> url : ( 518 ) 
15 -> number_int : ( 519 ) 
16 -> number_float : ( 520 ) 
17 -> magic_quotes : ( 521 ) 
18 -> callback : ( 1024 )