先临时记个代码

//得到cer(cem编码)的内容
function verifyReturn($data, $signature, $filePath)
{
    //shell:openssl x509 -in TrustPay.cer -inform der -text -noout
    $certificateCAcerContent = file_get_contents($filePath);

    $certificateCApemContent =  ‘-----BEGIN CERTIFICATE-----‘ . PHP_EOL
        . chunk_split(base64_encode($certificateCAcerContent), 64, PHP_EOL)
        . ‘-----END CERTIFICATE-----‘ . PHP_EOL;
    $pubkeyid = openssl_get_publickey($certificateCApemContent);
    $cerList = openssl_x509_parse($certificateCApemContent);
    //有需要可以加入签名和数据,这里只是需要读取证书内容,所以第一个和第二个参数不需要
    return $cerList;
}
$cerFile = "C:\Users\Administrator\aaa.cer";
var_dump(verifyReturn(‘‘, ‘‘, $cerFile));


//读取pfx
$cerContent = file_get_contents("C:\Users\Administrator.DESKTOP-4PF1LET\Desktop\cer.pfx");
$result = openssl_pkcs12_read($cerContent, $cer, "11");
if (!$result) {
    echo "证书无法读取，请检查证书路径、文件名以及密码是否正确";
}
var_dump(openssl_x509_parse($cer[‘cert‘]));

php cer.pfx证书读取