Spatie\Certificate\Certificate::getParentCertificateURL PHP Method

    public function getParentCertificateURL()
    {
        $x509 = new X509();
        $certProperties = $x509->loadX509($this->contents);
        foreach ($certProperties['tbsCertificate']['extensions'] as $extension) {
            if ($extension['extnId'] == 'id-pe-authorityInfoAccess') {
                foreach ($extension['extnValue'] as $extnValue) {
                    if ($extnValue['accessMethod'] == 'id-ad-caIssuers') {
                        return $extnValue['accessLocation']['uniformResourceIdentifier'];
                    }
                }
            }
        }
        return '';
    }

    public function testCertificate()
    {
        $certificateContents = '-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----' . PHP_EOL;
        $certificate = new Certificate($certificateContents);
        $this->specify('it can get the contents of a certificate', function () use($certificate, $certificateContents) {
            $this->assertSame(str_replace("\r", '', $certificate->getContents()), str_replace("\r", '', $certificateContents));
        });
        $this->specify('it can determine if the certificate has a parent', function () use($certificate, $certificateContents) {
            $this->assertEquals($certificate->hasParentInTrustChain(), true);
        });
        $this->specify('it can determine the issuer DN of a certificate', function () use($certificate, $certificateContents) {
            $this->assertEquals($certificate->getIssuerDN(), 'C=ZA, O=Thawte Consulting (Pty) Ltd., CN=Thawte SGC CA');
        });
        $this->specify('it can determine the URL of the parent certificate', function () use($certificate, $certificateContents) {
            $this->assertEquals($certificate->getParentCertificateURL(), 'http://www.thawte.com/repository/Thawte_SGC_CA.crt');
        });
    }