php实用函数

//curl post 请求
function httpPost($url,$data='',$header=['Content-type:text/json']) {
    $ch = curl_init(); //初始化curl
    curl_setopt($ch, CURLOPT_URL, $url);//设置链接
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//设置是否返回信息
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);//设置HTTP头
    curl_setopt($ch, CURLOPT_POST, 1);//设置为POST方式
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);//POST数据
    $res = curl_exec($ch);//接收返回信息

    curl_close($ch); //关闭curl链接
    return $res;
}

//curl get 请求

function httpGet($url,$header=array()) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);//如果成功只将结果返回，不自动输出任何内容。
    curl_setopt($curl, CURLOPT_TIMEOUT, 500); //作为最大延续500毫秒，超过这个时间将不去读取页面

    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);//不检测服务器的证书是否由正规浏览器认证过的授权CA颁发

    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);//不检测服务器的域名与证书上的是否一致

    curl_setopt($curl, CURLOPT_URL, $url);//设置提交地址路径

    $res = curl_exec($curl);//执行，并接收返回结果

    curl_close($curl);//关闭.

    return $res;
}

//递归创建目录
function mkdirs($path) {
    if (!is_dir($path)) {
        mkdirs(dirname($path));
        mkdir($path);
    }
    return is_dir($path);
}
//ASCII排序拼接sign
function mk_wx_sign($data,$pay_key){
    unset($data['sign']);
    ksort($data);
    $url=http_build_query($data);
    $signurl = urldecode($url);
    $stringSignTemp="$signurl&key=".$pay_key;
    return strtoupper(md5($stringSignTemp));
}
//数组转XML
function arrayToXml($arr){
    $xml = "<xml>";
    foreach ($arr as $key=>$val) {
        if (is_numeric($val)){
            $xml.="<".$key.">".$val."</".$key.">";
        }else{
            $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
        }
    }
    $xml.="</xml>";
    return $xml;
}
//将XML转为array
function xmlToArray($xml){
    //禁止引用外部xml实体
    libxml_disable_entity_loader(true);
    $values = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
    return $values;
}

// 生成随机字符串

function random_string($length){
    //生成一个包含 大写英文字母, 小写英文字母, 数字 的数组
    $arr = array_merge(range(0, 9), range('a', 'z'), range('A', 'Z'));
    $str = '';
    $arr_len = count($arr);
    for ($i = 0; $i < $length; $i++)
    {
        $rand = mt_rand(0, $arr_len-1);
        $str.=$arr[$rand];
    }
    return $str;
}

//ecshop计算不同等级的会员价

function level_price($rank,$res){

foreach($rank as $k=>$v){

         $res['rank_price'][$k]['rank_name']=$v['rank_name'];

          $res['rank_price'][$k]['rank_price']=sprintf('%.2f',floor($res['shop_price']*$v['discount']+0.5)/100);
      }

 }

//php内容过滤规则

function inject_check($str) {
   $check = preg_match('/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile/i', $str);   
   Return $check;
}

//将时间戳转换为"Y-m-d H:i:s"格式的函数
protected function timeToString(array $arr,array $fields,$format="Y-m-d H:i:s"){
    foreach($arr as $k=>$v){
        foreach($fields as $kk=>$vv){
            $arr[$k][$fields[$kk]]=date($format,$v[$fields[$kk]]);
        }
    }
    return $arr;
}

//将"Y-m-d H:i:s"转换为时间戳格式的函数
protected function stringToTime(array $arr,array $fields){
    foreach($arr as $k=>$v){
        foreach($fields as $kk=>$vv){
            $arr[$k][$fields[$kk]]=strtotime($v[$fields[$kk]]);
        }
    }
    return $arr;
}

//将时间戳转换为周（星期）

function getWeek($unixTime='')
{
   $unixTime=is_numeric($unixTime) ? $unixTime : time();
   $weekarray=array('日','一','二','三','四','五','六');
   return '周'.$weekarray[date('w',$unixTime)];
}

=========================签名算法===================

/*
* 检查签名
*/
protected function check_sign(){
    $get_data = I('get.');
    $post_data = I('post.');
    $data = array_merge($get_data,$post_data);
    unset($data['sign']);//去掉sign
    $rs['status'] = 60331;
    $sign = I('sign');
    $make_sign_result = $this->make_sign($data);
    if($sign != $make_sign_result){
        $rs['message'] =  C('error_60331');
        echo json_encode($rs);
        die();
    }
}
/*
 * 生成签名
 */
protected function make_sign($data){
    $data['salt'] = md5(sha1(C('salt')));
    ksort($data);//键值按ASII码排序
    $string = strtoupper($this->ToUrlParams($data));//小写转大写
    $sign = md5(sha1($string));
    return $sign;
}
/*
 * 数组转字url符串
 */
protected function ToUrlParams($data){
    $buff = "";
    foreach ($data as $k => $v)
    {
        if($k != "sign" && $v != "" && !is_array($v)){//过滤掉sign
            $buff .= $k . "=" . $v . "&";
        }
    }
    $buff = trim($buff, "&");
    return $buff;
}

trim($res, "\xEF\xBB\xBF");//去bom头，兼容各种系统

//生成uuid
function create_uuid($pre = ""){
       $str = md5(uniqid(mt_rand(), true));
       $uuid  = substr($str,0,8) . '-';
       $uuid .= substr($str,8,4) . '-';
       $uuid .= substr($str,12,4) . '-';
       $uuid .= substr($str,16,4) . '-';
       $uuid .= substr($str,20,12);
       return $pre . $uuid;
}

//回调地址
$back_act = (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : __HOST__ . $_SERVER['REQUEST_URI']);

//判断是否post提交
function is_post(){
    return isset($_SERVER['REQUEST_METHOD']) && strtoupper($_SERVER['REQUEST_METHOD'])=='POST';
}

//判断手机

$ua = strtolower($_SERVER['HTTP_USER_AGENT']);
$uachar = '/(nokia|sony|ericsson|mot|samsung|sgh|lg|philips|panasonic|alcatel|lenovo|cldc|midp|mobile)/i';
if ((($ua == '') || preg_match($uachar, $ua)) && !strpos(strtolower($_SERVER['REQUEST_URI']), 'wap')) {
   $Loaction = 'mobile/';

   if (!empty($Loaction)) {
      ecs_header('Location: ' . $Loaction . "\n");
      exit();
   }
}

/**
 * 从html内容中筛选链接
 * @param string $web_content
 * @return array
 */
function _filterUrl($web_content) {
    $reg_tag_a = '/<[a|A].*?href=[\'\"]{0,1}([^>\'\"\ ]*).*?>/';
    $result = preg_match_all($reg_tag_a, $web_content, $match_result);
    if ($result) {
        return $match_result[1];
    }
}

/**
 * 修正相对路径
 *
 * @param string $base_url
 * @param array $url_list
 * @return array
 */
function _reviseUrl($base_url, $url_list) {
    $url_info = parse_url($base_url);//解析url
    $base_url = $url_info["scheme"] . '://';
    if ($url_info["user"] && $url_info["pass"]) {
        $base_url .= $url_info["user"] . ":" . $url_info["pass"] . "@";
    }
    $base_url .= $url_info["host"];
    if ($url_info["port"]) {
        $base_url .= ":" . $url_info["port"];
    }
    $base_url .= $url_info["path"];
    if (is_array($url_list)) {
        foreach ($url_list as $url_item) {
            if (preg_match('/^http/', $url_item)) {
                // 已经是完整的url
                $result[] = $url_item;
            } else {
                // 不完整的url
                $real_url = $base_url . '/' . $url_item;
                $result[] = $real_url;
            }
        }
        return $result;
    } else {
        return false;
    }
}

//二维数组排序
function my_sort($arrays,$sort_key,$sort_order=SORT_DESC,$sort_type=SORT_NUMERIC){
    if(is_array($arrays)){
        foreach ($arrays as $array){
            if(is_array($array)){
                $key_arrays[] = $array[$sort_key];
            }else{
                return false;
            }
        }
    }else{
        return false;
    }
    array_multisort($key_arrays,$sort_order,$sort_type,$arrays);
    return $arrays;
}

function readBinFile(){
    $fp = fopen('filename', 'rb');
    while(! feof($fp)) {
        $buf = fread($fp, 512);
        //处理代码
    }
}

function readTextFile(){
    $fp = fopen('filename', 'r');
    while($buf = fgets($fp)) {
        //处理代码
    }
}