如何在PHP中从路径中读取证书指纹

<?php
// 证书路径
$certPath = '/path/to/certificate.crt';

// 读取证书内容
$certContent = file_get_contents($certPath);

// 计算证书指纹
$sha1Fingerprint = openssl_x509_fingerprint($certContent, 'sha1');
$sha256Fingerprint = openssl_x509_fingerprint($certContent, 'sha256');
$md5Fingerprint = openssl_x509_fingerprint($certContent, 'md5');

// 输出指纹结果
echo "SHA1指纹：$sha1Fingerprint\n";
echo "SHA256指纹：$sha256Fingerprint\n";
echo "MD5指纹：$md5Fingerprint\n";
?>