Description:
------------
openssl_x509_parse leaks memory, which is never freed again. Test certificate is the Let's Encrypt root certificate: https://letsencrypt.org/certs/isrgrootx1.pem.txt

https://bugs.php.net/bug.php?id=38261 is already closed and is only about invalid certificates.

Test script:
---------------
<?php

$pem = file_get_contents(__DIR__ . "/test.crt");
$i = 0;

while (true) {
    $cert = openssl_x509_read($pem);
    $info = openssl_x509_parse($cert); // <-- without it, it doesn't leak
    openssl_x509_free($cert);
    unset($cert);

    if ($i++ % 10000 === 0) {
        print PHP_EOL;
        print memory_get_usage(true);
        print PHP_EOL;
    }
}

Expected result:
----------------
2097152

2097152

2097152

2097152

2097152

2097152

2097152

2097152

Actual result:
--------------
2097152

2097152

4194304

4194304

6295552

6295552

6295552

8392704