ssl-info.php

<?php

$g = stream_context_create(
        array("ssl" => array(
            "capture_peer_cert" => true
        )
    )
);

$url = 'itomic.com.au';
$url = 'transact.nab.com.au';
        
$r = stream_socket_client(
    "ssl://$url:443", 
    $errno, 
    $errstr, 
    30,
    STREAM_CLIENT_CONNECT, 
    $g
);
    
    
var_dump($r);
    
$cont = stream_context_get_params($r);

var_dump($cont["options"]["ssl"]["peer_certificate"]);

$parsed = openssl_x509_parse($cont["options"]["ssl"]["peer_certificate"]);

var_dump($parsed);

echo '<br />';
echo serialize($parsed);
echo '<br />';
echo '<br />';
echo '<br />';
echo json_encode($parsed);
echo '<br />';