php一些工具函数介绍

本文主要和大家分享php一些工具函数介绍，这些都是比较常用的工具函数，希望能帮助到大家。

1.获得毫秒级别的时间戳

    public static function get_millisecond()
    {
        //获取毫秒的时间戳
        $time = explode(" ", microtime());        $time = $time[1] . substr($time[0], 2, 3);        return $time;
    }

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2读取文件内容

    public static function file_read($file_path)
    {

        if (file_exists($file_path)) {            $fp = fopen($file_path, "r");            $str = fread($fp, filesize($file_path));//指定读取大小，这里把整个文件内容读取出来
            $str = str_replace("\r\n", "<br />", $str);
            fclose($fp);            return $str;
        } else {            return false;
        }
    }

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3产生随机字符串，不长于32位

    public static function get_nonce_number($length = 11)
    {
        $chars = "0123456789";        $str = "";        for ($i = 0; $i < $length; $i++) {            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }        return $str;
    }

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4.生成订单详情号默认为16位

    public static function get_order_id($length = 16)
    {
        //见方法一，获得毫秒级别时间戳
        $time = self::get_millisecond();        $len = $length - 13;        $str = self::get_nonce_number($len);        if (strlen($time) != 13) {            $orderId = $str . $time . rand(1, 9);
        } else {            $orderId = $str . $time;
        }        return $orderId;

    }

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5.随机产生字母和数字（有重复的可能性）

    public static function randomkeys($length)
    {
        $returnStr = '';        $pattern = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLOMNOPQRSTUVWXYZ';        for ($i = 0; $i < $length; $i++) {            $returnStr .= $pattern{mt_rand(0, 61)}; //生成php随机数
        }        return $returnStr;
    }

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6.生成6位数验证码

    public static function random_code($length = 6)
    {
        $code = rand(pow(10, ($length - 1)), pow(10, $length) - 1);        return "$code";
    }

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7.防sql注入,xss攻击

    public static function clean($str)
    {
        $str = trim($str);        $str = strip_tags($str);        $str = stripslashes($str);        $str = addslashes($str);        $str = rawurldecode($str);        $str = quotemeta($str);        $str = htmlspecialchars($str);        return $str;
    }

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8.接收post或者get参数

    public static function get_input($name)
    {
        $request = Yii::$app->request;        if (isset($_GET[$name])) {            $value = $request->get($name);
        } elseif (isset($_POST[$name])) {            $value = $request->post($name);
        } else {            $value = '';
        }        return $value;
    }

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9.加密方法

    public static function aes_encrypt($str)
    {

        $privateKey = "私钥文件字符串";        $iv = "公钥文件字符串";        //加密
        $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $str, MCRYPT_MODE_CBC, $iv);//        return urlencode(base64_encode($encrypted));
        return base64_encode($encrypted);
    }

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10.解密方法

    public static function aes_decrypt($str)
    {
        $privateKey = "私钥文件字符串";        $iv = "公钥文件字符串";        $encryptedData = base64_decode($str);        $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);        $decrypted = rtrim($decrypted, "\0");        return $decrypted;
    }

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11.curl模拟带header头信息的get请求

    public static function curl_get($request_url,$session=[])
    {
        if($session){            $ch = curl_init();            $header = ["session:".$session]; //设置一个你的浏览器agent的header
            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
            curl_setopt($ch, CURLOPT_HEADER, 0); //返回response头部信息
            curl_setopt($ch, CURLOPT_URL, $request_url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//不在页面输出  返回数据
            $data_json=curl_exec($ch);
            curl_close($ch);
        }else{            $curl = new Curl();            $data_json = $curl->get($request_url);
        }        $data = json_decode($data_json, true);        return $data;
    }

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12.curl模拟带header头信息的post方法

    public static function curl_post($request_url,$params,$session=""){
        if($session){            $curl = curl_init();  //初始化
            $header = ["session:".$session]; //设置一个你的浏览器agent的header
            curl_setopt($curl,CURLOPT_URL,$request_url);  //设置url//            curl_setopt($curl,CURLOPT_HTTPAUTH,CURLAUTH_BASIC);  //设置http验证方法
            curl_setopt($curl,CURLOPT_HTTPHEADER,$header);  //设置头信息
            curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);  //设置curl_exec获取的信息的返回方式
            curl_setopt($curl,CURLOPT_POST,1);  //设置发送方式为post请求
            curl_setopt($curl,CURLOPT_POSTFIELDS,$params);  //设置post的数据
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//不在页面输出  返回数据
            $data_json = curl_exec($curl);            if($data_json === false){                echo curl_errno($curl);                exit();
            }
            curl_close($curl);
        }else{            $curl = new Curl();            $data_json = $curl->setOption(CURLOPT_POSTFIELDS, http_build_query($params))->post($request_url);
        }        $data = json_decode($data_json, true);        return $data;
    }

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13.远程下载图片到本地

    public static function downloadImage($url, $user_token)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        $file = curl_exec($ch);
        curl_close($ch);        $filename=$user_token.".jpg";        $path="./images/user/".$filename;        self::saveAsImage($file, $path);
    }    private  static function saveAsImage($file, $path)
    {

        $resource = fopen($path, 'a');
        fwrite($resource, $file);
        fclose($resource);
    }

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14.七牛上传图片

    public static function  actionImg($filename,$filepath)
    {
        $auth = new Auth(trim(Yii::$app->params["qiniu_params"]["accessKey"]),
            trim(Yii::$app->params["qiniu_params"]["secretKey"]));        $uploadMgr = new UploadManager();        $token = $auth->uploadToken(trim(Yii::$app->params["qiniu_params"]["upload_path"]));        list($succ, $fail) = $uploadMgr->putFile($token,            $filename,            $filepath
        );        $url = Yii::$app->params["qiniu_params"]["picture_url"] . "/" . $succ["key"];        return $url;
    }

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