/********************php驗(yàn)證身份證號(hào)碼是否正確函數(shù)*********************/ 
function is_idcard( $id ) 
{ 
  $id = strtoupper($id); 
  $regx = "/(^\d{15}$)|(^\d{17}([0-9]|X)$)/"; 
  $arr_split = array(); 
  if(!preg_match($regx, $id)) 
  { 
    return FALSE; 
  } 
  if(15==strlen($id)) //檢查15位 
  { 
    $regx = "/^(\d{6})+(\d{2})+(\d{2})+(\d{2})+(\d{3})$/"; 
 
    @preg_match($regx, $id, $arr_split); 
    //檢查生日日期是否正確 
    $dtm_birth = "19".$arr_split[2] . '/' . $arr_split[3]. '/' .$arr_split[4]; 
    if(!strtotime($dtm_birth)) 
    { 
      return FALSE; 
    } else { 
      return TRUE; 
    } 
  } 
  else      //檢查18位 
  { 
    $regx = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/"; 
    @preg_match($regx, $id, $arr_split); 
    $dtm_birth = $arr_split[2] . '/' . $arr_split[3]. '/' .$arr_split[4]; 
    if(!strtotime($dtm_birth)) //檢查生日日期是否正確 
    { 
      return FALSE; 
    } 
    else 
    { 
      //檢驗(yàn)18位身份證的校驗(yàn)碼是否正確。 
      //校驗(yàn)位按照ISO 7064:1983.MOD 11-2的規(guī)定生成，X可以認(rèn)為是數(shù)字10。 
      $arr_int = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); 
      $arr_ch = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); 
      $sign = 0; 
      for ( $i = 0; $i < 17; $i++ ) 
      { 
        $b = (int) $id{$i}; 
        $w = $arr_int[$i]; 
        $sign += $b * $w; 
      } 
      $n = $sign % 11; 
      $val_num = $arr_ch[$n]; 
      if ($val_num != substr($id,17, 1)) 
      { 
        return FALSE; 
      } //phpfensi.com 
      else 
      { 
        return TRUE; 
      } 
    } 
  } 
 
} 

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($id_card); 
 }else{ 
 return false; 
 } 
} 
// 計(jì)算身份證校驗(yàn)碼，根據(jù)國(guó)家標(biāo)準(zhǔn)GB 11643-1999 
function idcard_verify_number($idcard_base){ 
 if(strlen($idcard_base)!=17){ 
 return false; 
 } 
 //加權(quán)因子 
 $factor=array(7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2); 
 //校驗(yàn)碼對(duì)應(yīng)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]; 
 } 
 $mod=$checksum % 11; 
 $verify_number=$verify_number_list[$mod]; 
 return $verify_number; 
} 
// 將15位身份證升級(jí)到18位 
function idcard_15to18($idcard){ 
 if(strlen($idcard)!=15){ 
 return false; 
 }else{ 
 // 如果身份證順序碼是996 997 998 999，這些是為百歲以上老人的特殊編碼 
 if(array_search(substr($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 $idcard; 
} 
// 18位身份證校驗(yàn)碼有效性檢查 
function idcard_checksum18($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; 
 } 
}