key_exists('bfm_current_site', $_COOKIE)=<pre>bool(true)
</pre>=<br>
$_COOKIE['bfm_current_site']=<pre>string(29) "санкт-петербург"
</pre>=<br>
$arr_radio_city[$_COOKIE['bfm_current_site']]=<pre>string(3) "spb"
</pre>=<br>
key_exists($_COOKIE['bfm_current_site'], $arr_radio_city)=<pre>NULL
</pre>=<br>
+++ =<pre>bool(true)
</pre>=<br>
if <br>
$_COOKIE['bfm_current_site']=<pre>string(29) "санкт-петербург"
</pre>=<br>
$_COOKIE=<pre>array(2) {
  ["PHPSESSID"]=>
  string(26) "pvhtbgj1goe2pi82tu7pvevfsj"
  ["bfm_current_site"]=>
  string(29) "санкт-петербург"
}
</pre>=<br>
18.03.2026 13:43:30