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Home Backend Development PHP Tutorial PHP如何验证输入的银行卡是否有效

PHP如何验证输入的银行卡是否有效

Jun 23, 2016 pm 02:22 PM

php,代码,验证,银行卡

PHP如何验证输入的银行卡是否有效,我现在在做一个失物录入,录入银行卡的时候,我想验证这个银行卡是否有效,就好像是身份证一样,能验证这串字符是否符合,求完整的代码!听说有个luhn算法,不过这个貌似不太完整。谁给我一个能马上用的function

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在线等~~~~!!求大神

LUHN算法,主要用来计算信用卡等证件号码的合法性。
1、从卡号最后一位数字开始,偶数位乘以2,如果乘以2的结果是两位数,将两个位上数字相加保存。
2、把所有数字相加,得到总和。
3、如果信用卡号码是合法的,总和可以被10整除。

由此可得

function luhn($s) {  $n = 0;  for($i=strlen($s)-1; $i>=0; $i--) {    if($i % 2) $n += $s{$i};    else {      $t = $s{$i} * 2;      if($t > 9) $t = $t{0} + $t{1};      $n += $t;    }  }  return ($n % 10) == 0;}
Copy after login
Copy after login
Copy after login

LUHN算法,主要用来计算信用卡等证件号码的合法性。
1、从卡号最后一位数字开始,偶数位乘以2,如果乘以2的结果是两位数,将两个位上数字相加保存。
2、把所有数字相加,得到总和。
3、如果信用卡号码是合法的,总和可以被10整除。

由此可得

function luhn($s) {  $n = 0;  for($i=strlen($s)-1; $i>=0; $i--) {    if($i % 2) $n += $s{$i};    else {      $t = $s{$i} * 2;      if($t > 9) $t = $t{0} + $t{1};      $n += $t;    }  }  return ($n % 10) == 0;}
Copy after login
Copy after login
Copy after login

你这个代码貌似只能检测信用卡是否正确的吧?那借记卡呢?

那你去找算法描述呀

那你去找算法描述呀
刚测试了一下,貌似信用卡也测不了,测了几个卡不行

这没办法,我那个算法描述是在网上找的
如果你说不对的话,除非你给出你认为正确的算法描述

一般都是验证后4位


LUHN算法,主要用来计算信用卡等证件号码的合法性。
1、从卡号最后一位数字开始,偶数位乘以2,如果乘以2的结果是两位数,将两个位上数字相加保存。
2、把所有数字相加,得到总和。
3、如果信用卡号码是合法的,总和可以被10整除。

由此可得

function luhn($s) {  $n = 0;  for($i=strlen($s)-1; $i>=0; $i--) {    if($i % 2) $n += $s{$i};    else {      $t = $s{$i} * 2;      if($t > 9) $t = $t{0} + $t{1};      $n += $t;    }  }  return ($n % 10) == 0;}
Copy after login
Copy after login
Copy after login

你这个代码貌似只能检测信用卡是否正确的吧?那借记卡呢? 是不是还得传名字??没接触过



php信用卡卡号验证函数
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