初步验证身份证是否正确，验证是否为手机号php

function idcard_checksum18($idcard){    if (strlen($idcard) == 15) {        $idcard = idcard_15to18($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;    }}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 $verify_number;}function idcard_15to18($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;}