addWaterMarker('我 是 水 印');
    function addWaterMarker(str, w=300, h=300, c='#999999') {
    // 创建一个 Canvas 元素
    var canvas = document.createElement('canvas');
    canvas.width = w; // 设置 Canvas 的宽度
    canvas.height = h; // 设置 Canvas 的高度

    // 获取 Canvas 的 2D 上下文
    var ctx = canvas.getContext('2d');

    // 设置文本样式
    ctx.font = '18px Arial';
    ctx.fillStyle = c;
    ctx.textAlign = 'center';
    ctx.textBaseline = 'middle';

    // 设置字体水平度
    ctx.rotate(30 * Math.PI / 180);

    // 绘制文本
    ctx.fillText(str, canvas.width / 2, canvas.height / 2);

    // 将 Canvas 转换为 PNG 图片
    var dataURL = canvas.toDataURL('image/png');
    // 创建body下的div元素，使用固定定位，将canvas所谓背景图并铺满全屏
    let node = document.createElement("div");
    node.style.pointerEvents = "none";
    // 设置元素固定定位，并将宽高设置为100%,铺满全屏
    node.style.position = "fixed";
    node.style.width = "100%";
    node.style.height = "100%";
    node.style.top = "0";
    node.style.left = "0";
    node.style.opacity = "0.2";
    node.style.zIndex = "998";
    // 将canvas作为背景图，并设置左上开始，重复铺满全屏
    node.style.background = "url(" + dataURL + ") left top repeat";
    // 将创建的元素插入body中，作为body的子元素
    document.body.appendChild(node);
}

这是由于ueditor开启了xss过滤
修改ueditor.config.js中whitList的section标签即可

同样，如img标签默认也无style

Let’s Encrypt 每次申请仅3个月有效期
更新命令：certbot renew

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
0 0 1 */2 * certbot renew --quiet --force-renewal

certbot安装
yum -y install yum-utils
yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional
执行certbot certonly测试安装是否正确

PS：我也是随便复制的，只是想到了Let’s Encrypt的自动更新便百度了一下 :)

在复制微信的文章格式到ueditor时发现section标签中的style和class属性丢失，严重影响美观。
原因：ueditor中有xss过滤器，默认启用，按照配置文件中的白名单列表，不在其中的将去除。

解决：
修改ueditor文件中whiteList中找到section那项，把class和style加入白名单。

所有依赖都存在composer.json中，由于composer.json中相应库版本号未必为精确版本，所以同一份composer.json在不同时刻我们可能拉取到不同的依赖文件（默认拉取最新），从而可能导致问题。

当你执行composer update的时候，composer会去读取composer.json中指定的依赖，去分析他们，并且去拉取符合条件最新版本的依赖。然后他会把所拉取到的依赖放入vendor目录下，并且把所有拉取的依赖的精确版本号写入composer.lock文件中。

composer install所执行的事情非常类似，只在第一步的时候有差别。当你本地如果已经存在一份composer.lock时，它将会去读取你的composer.lock而非composer.json，并且以此为标准去下载依赖。当你本地没有composer.lock的时候，它所做的事情和composer update其实并没有区别。

可指定依赖更新，如 composer update monolog/monolog

解决：https://github.com/ramsey/uuid/issues/153

This is correct. Some of the math involved when dealing with UUIDs is impossible on 32-bit systems. This is because a UUID is an unsigned 128-bit integer, and the time portion of a version 1 UUID is an unsigned 64-bit number. PHP on a 32-bit system only supports signed integers up to 2147483647.

Installing the moontoast/math library should fix your issue:

composer require moontoast/math

错误信息
`SQLSTATE[42000]: Syntax error or access violation: 1055 Expression #3
of SELECT list is not in GROUP BY clause and contains nonaggregated column
'iicityYii.opportunity_conditions.money' which is not functionally dependent
on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by`

1. 查看 sql_mode
   select @@global.sql_mode
2. 去掉 ONLY_FULL_GROUP_BY
   set @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

或者：
SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));

或者，修改mysql配置文件，新增
[mysqld]
sql-mode=""

ThinkPHP5 自定义模版标签tablib

新建文件application/common/taglib/Diy.php
Diy.php

<?php
// +----------------------------------------------------------------------
// | 自定义模版标签
// +----------------------------------------------------------------------
// | Author: SenSen <1050575278> 2018-12
// +----------------------------------------------------------------------
namespace app\common\taglib;

use think\Db;
use think\template\TagLib;

class Sen extends TagLib
{
    protected $tags = [
        'arclist' => ['attr'=> 'field,id,limit,cid,order,name,flag,type', 'close'=>1],
        'show' => ['attr'=> 'title,field', 'close'=>0],
    ];

    /**
     * 文章标签
     * @param $tag
     * @param $content
     * @return string
     */
    public function tagArclist($tag, $content)
    {
        $id = isset($tag['id']) ? $tag['id'] : 'vo';
        $order = empty($tag['order']) ? "'id DESC'" : '"'.$tag['order'].'"';
        $name = 'article';
        $field = "''";
        if (!empty($tag['field'])) {
            if (strpos($tag['field'], '$') === 0) {
                $field = $tag['field'];
                $this->autoBuildVar($field);
            } else {
                $field = "'{$tag['field']}'";
            }
        }
        $cid = "''";
        if (!empty($tag['cid'])) {
            if (strpos($tag['cid'], '$') === 0) {
                $cid = $tag['cid'];
                $this->autoBuildVar($cid);
            } else {
                $cid = "'{$tag['cid']}'";
            }
        }
        $flag = "''";
        if (!empty($tag['flag'])) {
            if (strpos($tag['flag'], '$') === 0) {
                $flag = $tag['flag'];
                $this->autoBuildVar($flag);
            } else {
                $flag = "'{$tag['flag']}'";
            }
        }
        $type = "''";
        if (!empty($tag['type'])) {
            if (strpos($tag['type'], '$') === 0) {
                $type = $tag['type'];
                $this->autoBuildVar($type);
            } else {
                $type = "'{$tag['type']}'";
            }
        }
        $limit = "''";
        if (!empty($tag['limit'])) {
            if (strpos($tag['limit'], '$') === 0) {
                $limit = $tag['limit'];
                $this->autoBuildVar($limit);
            } else {
                $limit = "'{$tag['limit']}'";
            }
        }else{
            $limit = '0,6';
        }
        $parse = <<<parse
<?php
    \$$name = \app\common\model\Article::tagArticle([
    'field'   => {$field},
    'cid'=>{$cid},
    'limit'=>{$limit},
    'flag'=>{$flag},
    'type'=>{$type},
    'order'=>{$order}
]);
?>
{volist name="{$name}" id="{$id}"}
{$content}
{/volist}
parse;
        return $parse;
    }

    /**
     * 广告标签
     * @param $tag
     * @return mixed
     */
    public function tagShow($tag)
    {
        $title = $tag['title'] ? $tag['title'] : '';
        $result = Db::name('ad')->where(['tag'=>$title, 'status'=>1])->find();
        return $result['content'];
    }

}

- 阅读剩余部分 -