PHP实现根据银行卡号判断银行

header('Content-type:text/html;charset=utf-8'); require_once('bankList.php'); function bankInfo($card,$bankList) {   $card_8 = substr($card, 0, 8);   if (isset($bankList[$card_8])) {     echo $bankList[$card_8];     return;   }   $card_6 = substr($card, 0, 6);   if (isset($bankList[$card_6])) {     echo $bankList[$card_6];     return;   }   $card_5 = substr($card, 0, 5);   if (isset($bankList[$card_5])) {     echo $bankList[$card_5];     return;   }   $card_4 = substr($card, 0, 4);   if (isset($bankList[$card_4])) {     echo $bankList[$card_4];     return;   }   echo '该卡号信息暂未录入'; }  bankInfo('6228481552887309119',$bankList);