PHP 8 compytibility

PLEASE do this

/wp-content/plugins/post-state-tags/post-state-tags.php

// $iconname = $icon_list[$this->pfx . sanitize_key($lkey) . $this->icon];
$v1 = $this->pfx;$v2 = sanitize_key($lkey);$v3 = $this->icon;$vges =$v1.$v2.$v3;
if (isset($icon_list[$vges])) {
	$iconname = $icon_list[$vges];
}