$array['AVG Free']['OK'];
$array['Avast']['OK']; и т.д.

$hashF = "DEBUG: get from host AVG Free:OK Avast:OK Dr.Web:OK Kaspersky Antivirus:OK ESET NOD32:OK Opera:OK Roskomnadzor:OK Sophos:OK Trend Micro Internet Security:OK abuseat.org:OK DNS Blocked Domain:OK Google Chrome:OK Comodo:OK cyscon SIRT:OK Firefox Phishing and Malware Protection:OK Google Safe Browsing:OK hpHosts:OK IE8 Security Filter:OK K7 Ultimate:OK MalwareBlacklist.com:OK Malware Domain List:OK Malware Domain Blocklist:OK MalwareURL:OK McAfee SiteAdvisor:OK McAfee RBL:OK MyWot.com (Panda):OK Norton SafeWeb:OK PhishTank:OK rfc-ignorant.org:OK SpyEyeTracker:OK SpamCop:OK Spamhaus:OK VIPRE:OK Yandex:OK ZeuS domain blocklis:OK ZeuS IP blocklist:OK";

$pieces = explode(" ", $hashF);
echo $pieces[0];
echo $pieces[1];
echo $pieces[2];
echo $pieces[3];
echo $pieces[4];
echo $pieces[5];
echo $pieces[6];