[wakish]

Hi,

I would like to know the reason of filtering every ouput, even after being sanitized, with the following statement: return apply_filters(‘sanitized_string’, $string, $original_string, $context);

I can’t understand the purpose of this (surplus?) filtration..

And the “apply_filters” also have another sister function like “merge_filters” and “remove_filters”.

I would be glad to know the purpose of these, thanks!

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Function details:

1) found in file ./bb-includes/wp-functions.php as from line 579

2) the function:

function apply_filters($tag, $string) {

global $wp_filter, $merged_filters;

if ( !isset( $merged_filters[ $tag ] ) )

merge_filters($tag);

if ( !isset($wp_filter[$tag]) )

return $string;

reset( $wp_filter[ $tag ] );

$args = func_get_args();

do{

foreach( (array) current($wp_filter[$tag]) as $the_ )

if ( !is_null($the_) ){

$args[1] = $string;

$string = call_user_func_array($the_, array_slice($args, 1, (int) $the_));

}

} while ( next($wp_filter[$tag]) !== false );

return $string;

}