Adding social links in header – Supreme

Hello,I have added an Instagram icon/link into the supreme header. I am also trying to add a icon/link for linkedin and Soundcloud. But with my following code, the social links now only show up if ALL files are populated. Should I be doing something differently? Thank you.

add_filter('sd_details_output_social','_my_extra_social_details',10);
function _my_extra_social_details($output){
	global $post;

	if(isset($post->geodir_instagram) && $post->geodir_instagram){

if (strpos($output, 'fa-external-link-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-external-link-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_instagram) . '"><i class="fa fa-instagram"></i></a>',$output);
}elseif (strpos($output, 'fa-facebook-official') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-facebook-official"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_instagram) . '"><i class="fa fa-instagram"></i></a>',$output);
}elseif (strpos($output, 'fa-twitter-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-twitter-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_instagram) . '"><i class="fa fa-instagram"></i></a>',$output);
}else{
$output = str_replace('<div class="sd-contacts">','<div class="sd-contacts"><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_instagram) . '"><i class="fa fa-instagram"></i></a>',$output);
}
	  
	if(isset($post->geodir_linkedin) && $post->geodir_linkedin){

if (strpos($output, 'fa-external-link-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-external-link-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_linkedin) . '"><i class="fa fa-linkedin"></i></a>',$output);
}elseif (strpos($output, 'fa-facebook-official') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-facebook-official"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_linkedin) . '"><i class="fa fa-linkedin"></i></a>',$output);
}elseif (strpos($output, 'fa-twitter-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-twitter-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_linkedin) . '"><i class="fa fa-linkedin"></i></a>',$output);
}else{
$output = str_replace('<div class="sd-contacts">','<div class="sd-contacts"><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_linkedin) . '"><i class="fa fa-linkedin"></i></a>',$output);
}
	  
	if(isset($post->geodir_soundcloud) && $post->geodir_soundcloud){

if (strpos($output, 'fa-external-link-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-external-link-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_soundcloud) . '"><i class="fa fa-soundcloud"></i></a>',$output);
}elseif (strpos($output, 'fa-facebook-official') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-facebook-official"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_soundcloud) . '"><i class="fa fa-soundcloud"></i></a>',$output);
}elseif (strpos($output, 'fa-twitter-square') !== false) {
$output = str_replace('fa-external-link-square"></i></a>','fa-twitter-square"></i></a><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_soundcloud) . '"><i class="fa fa-soundcloud"></i></a>',$output);
}else{
$output = str_replace('<div class="sd-contacts">','<div class="sd-contacts"><a rel="nofollow" target="_blank" href="' . esc_url($post->geodir_soundcloud) . '"><i class="fa fa-soundcloud"></i></a>',$output);
}

// replace some icons
$output = str_replace('fa-facebook-official','fa-facebook',$output);
$output = str_replace('fa-linkedin','fa-linkedin',$output);
$output = str_replace('fa-twitter-square','fa-twitter',$output);
$output = str_replace('fa-phone-square','fa-phone',$output);
$output = str_replace('fa-external-link-square','fa-link',$output);

	}
	return $output;
}}}