xiaoming
//php验证身份证合法性
//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; $i < strlen($idcard_base); $i++){
$checksum += substr($idcard_base, $i, 1) * $factor[$i];
}
$mod = strtoupper($checksum % 11);
$verify_number = $verify_number_list[$mod];
return $verify_number;
}
//18位身份证校验码有效性检查function idcard_checksum18($idcard){
if (strlen($idcard) != 18){ return false; }
$aCity = array(11 => "北京",12=>"天津",13=>"河北",14=>"山西",15=>"内蒙古",
21=>"辽宁",22=>"吉林",23=>"黑龙江",
31=>"上海",32=>"江苏",33=>"浙江",34=>"安徽",35=>"福建",36=>"江西",37=>"山东",
41=>"河南",42=>"湖北",43=>"湖南",44=>"广东",45=>"广西",46=>"海南",
50=>"重庆",51=>"四川",52=>"贵州",53=>"云南",54=>"西藏",
61=>"陕西",62=>"甘肃",63=>"青海",64=>"宁夏",65=>"新疆",
71=>"台湾",81=>"香港",82=>"澳门",
91=>"国外");
//非法地区
if (!array_key_exists(substr($idcard,0,2),$aCity)) {
return false;
}
//验证生日
if (!checkdate(substr($idcard,10,2),substr($idcard,12,2),substr($idcard,6,4))) {
return false;
}
$idcard_base = substr($idcard, 0, 17);
if (idcard_verify_number($idcard_base) != strtoupper(substr($idcard, 17, 1))){
return false;
}else{
return true;
}
}
