FuncHelper.php

<?php
/**
 * Created by PhpStorm.
 * User: hoter.zhang
 * Date: 2017/1/17
 * Time: 10:53
 */

namespace xinyeweb\images;


use Yii;
use yii\imagine\Image;

/**
 * 自定义辅助函数，处理其他杂项
 */
class FuncHelper
{
    /**
     * ---------------------------------------
     * ajax标准返回格式
     * @param $code integer  错误码
     * @param $msg string  提示信息
     * @param $obj mixed  返回数据
     * @return void
     * ---------------------------------------
     */
    public static function ajaxReturn($code = 0, $msg = 'success', $obj = ''){
        /* api标准返回格式 */
        $json = array(
            'code' => $code,
            'msg'  => $msg,
            'obj'  => $obj,
        );
        header('Content-Type:application/json; charset=utf-8');
        exit(json_encode($json));
    }

    /**
     * ---------------------------------------
     * 分析枚举类型字段值 格式 a:名称1,b:名称2
     * @param $string string  字符串
     * @return mixed
     * ---------------------------------------
     */
    public static function parse_field_attr($string) {
        if(0 === strpos($string,':')){
            // 采用函数定义
            return eval(substr($string,1).';');
        }
        $array = preg_split('/[,;\r\n]+/', trim($string, ",;\r\n"));
        if(strpos($string,':')){
            $value  =   array();
            foreach ($array as $val) {
                list($k, $v) = explode(':', $val);
                $value[$k]   = $v;
            }
        }else{
            $value  =   $array;
        }
        return $value;
    }

    /**
     * ---------------------------------------
     * 读出数据库后，经常将状态等数字转化为字符串
     * @param mixed $data  参数信息
     * @param array $map 要转化的数组信息
     * @return string
     * ---------------------------------------
     */
    public static function int_to_string($data, $map=array(1=>'正常',-1=>'删除',0=>'禁用',2=>'未审核',3=>'草稿')) {
        if($data === false || $data === null ){
            return $data;
        }
        $data = (array)$data;
        if(isset($map[$data])){
            return $map[$data];
        }
        return '';
    }

    /**
     * ---------------------------------------
     * 上传base64格式的图片
     * @param string $imgbase64 图片的base64编码
     * @return mixed
     * ---------------------------------------
     */
    public static function uploadImage($imgbase64){
        if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $imgbase64, $result)){
            $type = $result[2];
            $type = $type == 'jpeg' ? 'jpg' : $type;
            $fileName = time() . rand( 1 , 1000 ) . ".".$type;
            /* 以年月创建目录 */
            $dir = date('Ym', time());
            if (!file_exists(Yii::$app->params['upload']['path'].$dir)) {
                mkdir(Yii::$app->params['upload']['path'].$dir, 0777);
            }
            //$path = Yii::getAlias('@webroot/assets/uploads/'.$dir);
            //self::fileExists($path);
            $fileName = $dir.'/'.$fileName;

            if (file_put_contents(Yii::$app->params['upload']['path'].$fileName, base64_decode(str_replace($result[1], '', $imgbase64)))){
                //Image::thumbnail(Yii::$app->params['upload']['path'].$fileName, 40, 40)->save(Yii::$app->params['upload']['path'].$fileName,['quality' => 100]);
                return $fileName;
            }
        }
        return false;
    }
    
    /**
     *---------------------------------------
     * 导出数据为excel表格
     * @param array $data 一个二维数组,结构如同从数据库查出来的数组
     * @param array $title excel的第一行标题,一个数组,如果为空则没有标题
     * @param string $filename 文件名
     *---------------------------------------
     */
    public static function exportexcel($data=array(),$title=array(),$filename='report'){
        header("Content-type:application/octet-stream");
        header("Accept-Ranges:bytes");
        header("Content-type:application/vnd.ms-excel");
        header("Content-Disposition:attachment;filename=".$filename.".xls");
        header("Pragma: no-cache");
        header("Expires: 0");
        //导出xls 开始
        if (!empty($title)){
            foreach ($title as $k => $v) {
                $title[$k]=iconv("UTF-8", "GB2312",$v);
            }
            $title= implode("\t", $title);
            echo "$title\n";
        }
        if (!empty($data)){
            foreach($data as $key=>$val){
                foreach ($val as $ck => $cv) {
                    $data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);
                }
                $data[$key]=implode("\t", $data[$key]);

            }
            echo implode("\n",$data);
        }
    }

    public static function src($url,$params = '',$isUrl = false){
        if ($isUrl === false) {
            return Yii::$app->params['upload']['url'].$url;
        }
        $query = 'path='.$url;
        if ($params) {
            $query .= '&'.$params;
        }
        if (Yii::$app->params['storage_encrypt']) {
            $query = 'path='.base64_encode($query);

        }
        return Yii::getAlias('@webroot').'/index.php?'.$query;
    }
}