srfm_ipapi_api_key

/**
* filter source (Free) inc/helper.php 
*/
$api_key = apply_filters( 'srfm_ipapi_api_key', '' );

/**
* filter source (Free) inc/helper.php 
*/
$api_key = apply_filters( 'srfm_ipapi_api_key', '' );

add_filter( 'srfm_ipapi_api_key', 'my_callback', 10, 1 ); 
function my_callback( $api_key ) { 
return 'your-api-key'; 
}

add_filter( 'srfm_ipapi_api_key', 'my_callback', 10, 1 ); 
function my_callback( $api_key ) { 
return 'your-api-key'; 
}

add_filter( 'srfm_ipapi_api_key', 'my_callback', 10, 1 ); 
function my_callback( $api_key ) { 
return 'your-api-key'; 
}

add_filter( 'srfm_ipapi_api_key', 'my_callback', 10, 1 ); 
function my_callback( $api_key ) { 
return 'your-api-key'; 
}