PHP实现中国公民身份证号码有效性验证示例代码

<?php
namespace comjdk5blogidvalidator;
 
class idvalidator {
 private static $gb2260;
 private static $instance;
 private static $cache = array();
 private static $util;
 function __construct() {
 if (!class_exists("comjdk5blogidvalidatorgb2260")){
 include 'gb2260.php';
 }
 if (!class_exists("comjdk5blogidvalidatorutil")){
 include 'util.php';
 }
 self::$gb2260 = gb2260::getgb2260 ();
 self::$util = util::getinstance();
 }
 public static function getinstance() {
 if (is_null ( self::$instance )) {
 self::$instance = new idvalidator ();
 }
 return self::$instance;
 }
 function isvalid($id) {
 $code = self::$util->checkarg ( $id );
 if ($code === false) {
 return false;
 }
 // 查询cache
 if (isset ( self::$cache [ $id ] ) && self::$cache [$id] ['valid'] !== false) {
 return self::$cache [$id] ['valid'];
 } else {
 if (! isset ( self::$cache [ $id ] )) {
 self::$cache [$id] = array ();
 }
 }
 
 $addr = substr ( $code ['body'], 0, 6 );
 $birth = $code ['type'] === 18 ? substr ( $code ['body'], 6, 8 ) :
 substr ( $code ['body'], 6, 6 );
 $order = substr ( $code ['body'], - 3 );
 
 if (! (self::$util->checkaddr ( $addr ) && self::$util->checkbirth ( $birth ) &&
 self::$util->checkorder ( $order ))) {
 self::$cache [$id] ['valid'] = false;
 return false;
 }
 
 // 15位不含校验码，到此已结束
 if ($code ['type'] === 15) {
 self::$cache [$id] ['valid'] = true;
 return true;
 }
 
 /* 校验位部分 */
 
 // 位置加权
 $posweight = array ();
 for($i = 18; $i > 1; $i --) {
 $wei = self::$util->weight ( $i );
 $posweight [$i] = $wei;
 }
 
 // 累加body部分与位置加权的积
 $bodysum = 0;
 $bodyarr = str_split( $code ['body'] );
 for($j = 0; $j < count ( $bodyarr ); $j ++) {
 $bodysum += (intval ( $bodyarr [$j], 10 ) * $posweight [18 - $j]);
 }
 
 // 得出校验码
 $checkbit = 12 - ($bodysum % 11);
 if ($checkbit == 10) {
 $checkbit = 'x';
 } else if ($checkbit > 10) {
 $checkbit = $checkbit % 11;
 }
 // 检查校验码
 if ($checkbit != $code ['checkbit']) {
 self::$cache [$id] ['valid'] = false;
 return false;
 } else {
 self::$cache [$id] ['valid'] = true;
 return true;
 }
 }
 // 分析详细信息
 function getinfo ($id) {
 // 号码必须有效
 if ($this->isvalid($id) === false) {
 return false;
 }
 // todo 复用此部分
 $code = self::$util->checkarg($id);
 
 // 查询cache
 // 到此时通过isvalid已经有了cache记录
 if (isset(self::$cache[$id]) && isset(self::$cache[$id]['info'])) {
 return self::$cache[$id]['info'];
 }
 
 $addr = substr($code['body'], 0, 6);
 $birth = ($code['type'] === 18 ? substr($code['body'], 6, 8) :
 substr($code['body'], 6, 6));
 $order = substr($code['body'], -3);
 
 $info = array();
 $info['addrcode'] = $addr;
 if (self::$gb2260 !== null) {
 $info['addr'] = self::$util->getaddrinfo($addr);
 }
 $info ['birth'] = ($code ['type'] === 18 ? (substr ( $birth, 0, 4 ) . '-' . substr ( $birth, 4, 2 ) . '-' . substr ( $birth, - 2 )) : ('19' . substr ( $birth, 0, 2 ) . '-' . substr ( $birth, 2, 2 ) . '-' . substr ( $birth, - 2 )));
 $info['sex'] = ($order % 2 === 0 ? 0 : 1);
 $info['length'] = $code['type'];
 if ($code['type'] === 18) {
 $info['checkbit'] = $code['checkbit'];
 }
 
 // 记录cache
 self::$cache[$id]['info'] = $info;
 
 return $info;
 }
 
 // 仿造一个号
 function makeid ($isfifteen=false) {
 // 地址码
 $addr = null;
 if (self::$gb2260 !== null) {
 $loopcnt = 0;
 while ($addr === null) {
 // 防止死循环
 if ($loopcnt > 50) {
  $addr = 110101;
  break;
 }
 $prov = self::$util->str_pad(self::$util->rand(66), 2, '0');
 $city = self::$util->str_pad(self::$util->rand(20), 2, '0');
 $area = self::$util->str_pad(self::$util->rand(20), 2, '0');
 $addrtest = $prov . $city . $area;
 if (isset(self::$gb2260[$addrtest])) {
  $addr = $addrtest;
  break;
 }
 $loopcnt ++;
 }
 } else {
 $addr = 110101;
 }
 
 // 出生年
 $yr = self::$util->str_pad(self::$util->rand(99, 50), 2, '0');
 $mo = self::$util->str_pad(self::$util->rand(12, 1), 2, '0');
 $da = self::$util->str_pad(self::$util->rand(28, 1), 2, '0');
 if ($isfifteen) {
 return $addr . $yr . $mo . $da
 . self::$util->str_pad(self::$util->rand(999, 1), 3, '1');
 }
 
 $yr = '19' . $yr;
 $body = $addr . $yr . $mo . $da . self::$util->str_pad(self::$util->rand(999, 1), 3, '1');
 
 // 位置加权
 $posweight = array();
 for ($i = 18; $i > 1; $i--) {
 $wei = self::$util->weight($i);
 $posweight[$i] = $wei;
 }
 
 // 累加body部分与位置加权的积
 $bodysum = 0;
 $bodyarr = str_split($body);
 for ($j = 0; $j < count($bodyarr); $j++) {
 $bodysum += (intval($bodyarr[$j], 10) * $posweight[18 - $j]);
 }
 
 // 得出校验码
 $checkbit = 12 - ($bodysum % 11);
 if ($checkbit == 10) {
 $checkbit = 'x';
 } else if ($checkbit > 10) {
 $checkbit = $checkbit % 11;
 }
 return ($body . $checkbit);
 }
}

<?php
header("content-type: text/html; charset=utf-8");

include 'idvalidator.php';
$v = comjdk5blogidvalidatoridvalidator::getinstance();

//生成一个18位身份证号
$id = $v->makeid();
//获取身份证信息
$info = $v->getinfo($id);
var_dump($info);
//生成一个15位身份证号
$id = $v->makeid(true);
$info = $v->getinfo($id);
var_dump($info);

//验证身份证号是否正确
var_dump($v->isvalid("123456789012345678"));