份證號驗證(兼容15，18位) ，注冊驗證的時候可以用上。
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//比較菜鳥 第一次分享代碼
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//身份證號驗證
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protected function checkIdCard(){
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if(empty($_POST['idcard'])){
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return false;
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}
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$idcard = $_POST['idcard'];
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$City = array(11=>"北京",12=>"天津",13=>"河北",14=>"山西",15=>"內蒙古",21=>"遼寧",22=>"吉林",23=>"黑龍江",31=>"上海",32=>"江蘇",33=>"浙江",34=>"安徽",35=>"福建",36=>"江西",37=>"山東",41=>"河南",42=>"湖北",43=>"湖南",44=>"廣東",45=>"廣西",46=>"海南",50=>"重慶",51=>"四川",52=>"貴州",53=>"雲南",54=>"西藏",61=>"陝西",62=>"甘肅",63=>"青海",64=>"寧夏",65=>"新疆",71=>"台灣",81=>"香港",82=>"澳門",91=>"國外");
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$iSum = 0;
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$idCardLength = strlen($idcard);
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//長度驗證
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if(!preg_match('/^\d{17}(\d|x)$/i',$idcard) and!preg_match('/^\d{15}$/i',$idcard))
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{
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return false;
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}
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//地區驗證
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if(!array_key_exists(intval(substr($idcard,0,2)),$City))
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{
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return false;
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}
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// 15位身份證驗證生日，轉換為18位
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if ($idCardLength == 15)
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{
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$sBirthday = '19'.substr($idcard,6,2).'-'.substr($idcard,8,2).'-'.substr($idcard,10,2);
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$d = new DateTime($sBirthday);
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$dd = $d->format('Y-m-d');
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if($sBirthday != $dd)
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{
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return false;
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}
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$idcard = substr($idcard,0,6)."19".substr($idcard,6,9);//15to18
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$Bit18 = getVerifyBit($idcard);//算出第18位校驗碼
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$idcard = $idcard.$Bit18;
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}
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// 判斷是否大於2078年，小於1900年
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$year = substr($idcard,6,4);
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if ($year<1900 || $year>2078 )
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{
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return false;
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}
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//18位身份證處理
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$sBirthday = substr($idcard,6,4).'-'.substr($idcard,10,2).'-'.substr($idcard,12,2);
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$d = new DateTime($sBirthday);
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$dd = $d->format('Y-m-d');
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if($sBirthday != $dd)
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{
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return false;
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}
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//身份證編碼規范驗證
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$idcard_base = substr($idcard,0,17);
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if(strtoupper(substr($idcard,17,1)) != getVerifyBit($idcard_base))
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{
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return false;
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}
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return $_POST['idcard'];
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}
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// 計算身份證校驗碼，根據國家標准GB 11643-1999
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function getVerifyBit($idcard_base)
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{
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if(strlen($idcard_base) != 17)
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{
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return false;
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}
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//加權因子
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$factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
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//校驗碼對應值
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$verify_number_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4','3', '2');
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$checksum = 0;
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for ($i = 0; $i < strlen($idcard_base); $i++)
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{
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$checksum += substr($idcard_base, $i, 1) * $factor[$i];
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}
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$mod = $checksum % 11;
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$verify_number = $verify_number_list[$mod];
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return $verify_number;
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}
