PHP实现身份证验证函数
欢迎进入Linux社区论坛，与200万技术人员互动交流 >>进入 PHP实现身份证验证函数 function validation_filter_id_card（$id_card）{ if（strlen（$id_card） == 18） { return idcard_checksum18（$id_card）； }elseif（（strlen（$id_card） == 15））{ $i
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PHP实现身份证验证函数
function validation_filter_id_card（$id_card）{
if（strlen（$id_card） == 18） {
return idcard_checksum18（$id_card）；
}elseif（（strlen（$id_card） == 15））{
$id_card = idcard_15to18（$id_card）；
return idcard_checksum18（$id_card）；
}else{
return false;
}
}
// 计算身份证校验码，根据国家标准GB 11643-1999
function idcard_verify_number（$idcard_base）{
if（strlen（$idcard_base） != 17）{
return false;
}
//加权因子
$factor = array（7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2）；
//校验码对应值
$verify_number_list = array（'1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'）；
$checksum = 0;
for （$i = 0; $i
$checksum += substr（$idcard_base, $i, 1） * $factor[$i];
}
$mod = $checksum % 11;
$verify_number = $verify_number_list[$mod];
return $verify_number;
}
// 将15位身份证升级到18位
function idcard_15to18（$idcard）{
if （strlen（$idcard） != 15）{
return false;
}else{
// 如果身份证顺序码是996 997 998 999,这些是为百岁以上老人的特殊编码
if （array_search（substr（$idcard, 12, 3）， array（'996', '997', '998', '999'）） !== false）{
$idcard = substr（$idcard, 0, 6） . '18'. substr（$idcard, 6, 9）；
}else{
$idcard = substr（$idcard, 0, 6） . '19'. substr（$idcard, 6, 9）；
}
}
$idcard = $idcard . idcard_verify_number（$idcard）；
return $idcard;
}
// 18位身份证校验码有效性检查
function idcard_checksum18（$idcard）{
if （strlen（$idcard） != 18）{
return false;
}
$idcard_base = substr（$idcard, 0, 17）；
if（idcard_verify_number（$idcard_base） != strtoupper（substr（$idcard, 17, 1）））{
return false;
}else{
return true;
}
}
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