s2_email_headers

The Subscribe2 s2 email headers hook.

Description

apply_filters( 's2_email_headers', (unknown) $header ); 

Parameters (1)

0. $header (unknown)

The header.

Usage

To run the hook, copy the example below.

$header = apply_filters( 's2_email_headers', $header ); 
                         
if ( !empty( $header ) ) { 
                         
   // everything has led up to this point... 
                         
} 
  

The following example is for adding a hook callback.

// define the s2_email_headers callback 
function filter_s2_email_headers( $header ) { 
    // make filter magic happen here... 
    return $header; 
}; 
         
// add the filter 
add_filter( 's2_email_headers', 'filter_s2_email_headers', 10, 1 ); 

To remove a hook callback, use the example below.

// remove the filter 
remove_filter( 's2_email_headers', 'filter_s2_email_headers', 10, 1 );