<filter>

The W3 Total Cache filter hook.

Description

apply_filters( '<filter>', (unknown) $v ); 

Parameters (1)

0. $v (unknown)

The v.

Usage

To run the hook, copy the example below.

$v = apply_filters( '{$filter}', $v ); 
                         
if ( !empty( $v ) ) { 
                         
   // everything has led up to this point... 
                         
} 
  

The following example is for adding a hook callback.

// define the <filter> callback 
function filter_filter( $v ) { 
    // make filter magic happen here... 
    return $v; 
}; 
         
// add the filter 
add_filter( "{$filter}", 'filter_filter', 10, 1 ); 

To remove a hook callback, use the example below.

// remove the filter 
remove_filter( "{$filter}", 'filter_filter', 10, 1 );