SSL Lookup Script. Queries a site's SSL information using the openSSL tool in Linux

lookup.php

<?php
public function getssldata( $d ){
        $domain = $d;
        $url = "www." . $domain;
        $ip = gethostbyname($url);
        $commonName = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -noout -subject | sed -e 's/.*CN=\*.//'");
        $sans = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -text | grep DNS | sed -e 's/DNS://g'");
        $expireDate = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -noout -dates | grep notAfter | sed -e s#notAfter=##");
        $issuer = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -noout -issuer | sed -e 's/.*CN=//' -e 's/\/OU.*//'");
        $signatureAlgorith = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -noout -text | grep 'Signature Algorithm' | head -1 | sed -e 's/.*m://'");
        $serialNumber = shell_exec("openssl s_client -servername {$domain} -connect {$domain}:443 2>/dev/null | openssl x509 -noout -serial | sed -e 's/.*al=//'");
        return array(
            "ip" => $ip,
            "commonName" => $commonName,
            "sans" => $sans,
            "expireDate" => $expireDate,
            "issuer" =>  $issuer,
            "signatureAlgorith" => $signatureAlgorith,
            "serialNumber" => $serialNumber,
        );
        
    }