PHP 常用方法 (二)

无限级分类(一维数组)

/**
 * 无限级分类(一维数组)
 * @param array $data
 * @param array $fieldNameArr
 * @param int $pid
 * @param int $level
 * @param int $showLevel
 *
 * @return array
 */
function getTree(&$data, $fieldNameArr = ['pid', 'id'], $pid = 0, $level = 0, $showLevel = 3)
{
    if ($level >= $showLevel) {
        return $data['new'];
    }

    if (!isset($data['old'])) {
        $data = [
            'old' => $data,
            'new' => []
        ];
    }

    foreach ($data['old'] as $k => $v) {
        if ($v[$fieldNameArr[0]] == $pid) {
            $v['level'] = $level;
            $data['new'][] = $v;
            unset($data['old'][$k]);
            getTree($data, $fieldNameArr, $v[$fieldNameArr[1]], $level + 1, $showLevel);
        }
    }
    return $data['new'];
}

无限级分类(多维数组)

/**
 * 无限级分类(多维数组)
 *
 * @param array $data
 * @param array $fieldNameArr
 *
 * @return array
 */
function getTreeT($data, $fieldNameArr = ['pid', 'id'])
{
    $dataArr = [];
    foreach ($data as $d) {
        $dataArr[$d[$fieldNameArr[1]]] = $d;
        $dataArr[$d[$fieldNameArr[1]]]['child'] = array();
    }
    foreach ($dataArr as $k => $v) {
        if ($v[$fieldNameArr[0]] != 0) {
            $dataArr[$v[$fieldNameArr[0]]]['child'][$v[$fieldNameArr[1]]] = &$dataArr[$v[$fieldNameArr[1]]];
        }
    }
    foreach ($dataArr as $tk => $tv) {
        if ($tv[$fieldNameArr[0]] != 0 || !isset($tv[$fieldNameArr[0]])) {
            unset($dataArr[$tk]);
        }
    }

    return $dataArr;
}

获取某个分类下的所有子类

/**
 * 获取某个分类下的所有子类
 * @param array $data
 * @param int $parentId
 * @param array $fieldNameArr
 * @return array $dataArr
 */
function getCateChild($data, $parentId, $fieldNameArr = ['pid', 'id'], &$dataArr = array())
{
    foreach ($data as $k => $v) {
        if ($v[$fieldNameArr[0]] == $parentId) {
            $dataArr[] = $v[$fieldNameArr[1]];
            getCateChild($data, $v[$fieldNameArr[1]], $fieldNameArr, $dataArr);
        }
    }

    return $dataArr;
}

IP转换为整数

/**
 * IP转换为整数
 * IP段地址：http://ipblock.chacuo.net/down/t_txt=c_CN
 *
 * @param boolean $rand 获取国内随机IP
 *
 * @return array
 */
function get_ip_convert($rand = false)
{
    if ($rand) {
        $ipLong = [
            ['610271232', '618659839'],     // 36.96.0.0    -   36.223.255.255
            ['1002434560', '1008730111'],   // 59.191.240.0 -   60.31.255.255
            ['1861222400', '1866465279'],   // 110.240.0.0  -   111.63.255.255
            ['-569376768', '-564133889'],   // 222.16.0.0   -   222.95.255.255
            ['-1224736768', '-1220018177'], // 183.0.0.0    -   183.71.255.255
            ['-1212678144', '-1207959553'], // 183.184.0.0  -   183.255.255.255
            ['1879048192', '1883504639'],   // 112.0.0.0    -   112.67.255.255
        ];
        $randKey = mt_rand(0, count($ipLong));
        $ipArr = [long2ip(mt_rand($ipLong[$randKey][0], $ipLong[$randKey][1]))];
    } else {
        $ipArr = [$_SERVER['REMOTE_ADDR'] == '::1' ? '127.0.0.1' : $_SERVER['REMOTE_ADDR']];
    }

    $ipArr[1] = sprintf('%u', ip2long($ipArr[0]));
    return $ipArr;
}

笛卡尔积

function cartesianProduct(array $params): array
{
    $result = array_shift($params);
    while ($item = array_shift($params)) {
        $temp = [];
        foreach ($result as $res) {
            !is_array($res) && $res = [$res];
            foreach ($item as $val) {
                !is_array($val) && $val = [$val];
                $temp[] = array_merge($res, $val);
            }
        }

        $result = $temp;
    }

    return $result;
}

客户端类型校验

/**
 * 客户端类型校验
 *
 * @param int $type 1:微信内置浏览器, 2:支付宝内置浏览器, 3:IOS, 4:Android
 *
 * @return bool
 */
function clientTypeValidator(int $type): bool
{
    $mobileFlag = self::isMobile();
    if ($mobileFlag) {
        $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);
        switch ($type) {
            // 微信内置浏览器
            case 1:
                return strpos($userAgent, 'micromessenger') !== false;
            // 支付宝内置浏览器
            case 2:
                return strpos($userAgent, 'aliapp') !== false;
            // IOS
            case 3:
                return strpos($userAgent, 'iphone') !== false;
            // Android
            case 4:
                return strpos($userAgent, 'android') !== false;
            default:
                return false;
        }
    }

    return false;
}

判断请求来源是否手机端

/**
 * 判断请求来源是否手机端
 *
 * @return int
 */
function isMobile()
{
    // HTTP_X_WAP_PROFILE|VIA信息含有wap
    if (isset($_SERVER['HTTP_X_WAP_PROFILE']) || (isset($_SERVER['HTTP_VIA']) && stristr($_SERVER['HTTP_VIA'], 'wap'))) {
        return true;
    }

    $clientKeywords = [
        'nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp', 'sie-', 'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone',
        'ipod', 'blackberry', 'meizu', 'android', 'netfront', 'symbian', 'ucweb', 'windowsce', 'palm', 'operamini', 'operamobi', 'openwave',
        'nexusone', 'cldc', 'midp', 'wap', 'mobile'
    ];
    if (preg_match("/(" . implode('|', $clientKeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
        return true;
    }

    return false;
}

JSON字符串校验

/**
 * JSON字符串校验
 *
 * @param string $jsonStr
 *
 * @return false|array
 */
function jsonValidate(string $jsonStr)
{
    $result = json_decode($jsonStr, true);
    return (json_last_error() == JSON_ERROR_NONE) ? $result : false;
}