Analysis of parameter passing issues when using curl to send get requests in PHP

function get_info($card){
 
  $url ="http://www.sdt.com/api/White/CardInfo?cardNo=".$bank_card; 
 
  $ch = curl_init();
  //设置选项，包括URL
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HEADER, 0);
 
  //执行并获取HTML文档内容
  $output = curl_exec($ch);
  //释放curl句柄
  curl_close($ch);
  return $output;
}

function get_bankcard_info($bank_card){
 
  $url ="https://ccdcapi.alipay.com/validateAndCacheCardInfo.json?_input_charset=utf-8&cardNo=".$bank_card."&cardBinCheck=true";
 
  $ch = curl_init();
 
  //设置选项，包括URL
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);//绕过ssl验证
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
 
  //执行并获取HTML文档内容
  $output = curl_exec($ch);
 
  //释放curl句柄
  curl_close($ch);
  return $output;
}