1：在商户进件接口api中报错 string(59) "{"code":"PARAM_ERROR","message":"平台私钥解密失败"}" 2:用证书给需要加密的参数加的密 方法如下 function getEncrypt($str){ //$str是待加密字符串 $public_key_path = 'cert.pem'; $public_key = file_get_contents($public_key_path); $encrypted = ''; if (openssl_public_encrypt($str,$encrypted,$public_key,OPENSSL_PKCS1_OAEP_PADDING)) { //base64编码 $sign = base64_encode($encrypted); } else { throw new Exception('encrypt failed'); } return $sign; } （加密生成的字符串可以用私钥反向解密成原字符串） 3：调用商户进件接口api后报错 string(59) "{"code":"PARAM_ERROR","message":"平台私钥解密失败"}