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shell判断文件、文件夹是否存在

dir="/folder"
file="/test/test.txt"
file2="/test/test.php"

判断文件夹是否存在,不存在则创建
if [ ! -d "${dir}" ]; then
    mkdir -p ${dir}
fi

判断文件是否存在且可执行
if [ ! -x "${dir}"]; then
    mkdir "${dir}"
fi

判断文件是否存在
if [ ! -f "$file" ]; then
    touch "$file"
fi

判断变量是否有值
if [ ! -n "$file" ]; then
 echo "$file 变量为空!"
 exit 0
fi

判断两个变量的字符串内容是否相同
if [ "$file" = "$file2" ]; then
    echo "$file equal $file2"
else
    echo "$file not equal $file2"
fi

shell脚本批量检测mysql表中是否存在指定字段

批量查询数据库中表是否存在指定字段,批量添加表字段:

#!/bin/bash
#exit
db_con="/usr/local/mysql/bin/mysql -uroot -p123456"
arr=(db1 db2 db3)
for db in ${arr[*]}
do
    ${db_con} -e "select count(*) from information_schema.columns where table_schema = '${db}' and table_name = 'table_name' and column_name = 'column_name';"  >> /data/shell/test.txt
    echo ${db} >> /data/shell/test.txt 
    #${db_con} -e "ALTER TABLE ${db}.gy_com_customer ADD new_column varchar(100) NOT NULL default '';" 2>/dev/null
    echo ${db} " --- done"
done

apache同时配置80和443端口 the first has precedence, perhaps you need a NameVirtualHost directive

同时添加:
NameVirtualHost *:80
NameVirtualHost *:443

<VirtualHost *:443>
    DocumentRoot "/www/hitortoise"
    ServerName www.r1989.com

    SSLEngine on
    SSLCertificateFile /www/ssl/2_www.r1989.com.crt
    SSLCertificateKeyFile /www/ssl/3_www.r1989.com.key
    SSLCertificateChainFile /www/ssl/1_root_bundle.crt
</VirtualHost>

<VirtualHost *:80>
     DocumentRoot "/www/hitortoise"
     ServerName www.r1989.com

     RewriteEngine on
     RewriteCond %{HTTP_HOST} ^www.r1989.com$
     RewriteRule ^/(.*)$ https://www.r1989.com/$1 [R=301,L]
</VirtualHost>

phpword添加批注注释信息

$phpWord = \PhpOffice\PhpWord\IOFactory::load("/test/test1.docx");

//创建注释
$comment= new \PhpOffice\PhpWord\Element\Comment('森森', new \DateTime(), 'my_initials');
$comment->addText('这是批注的信息内容', array('bold' => false, 'color'=>'ff0000'));

//添加到注释
$phpWord->addComment($comment);

$section = $phpWord->getSection(0);

//创建文本并添加注释
$textrun = $section->addTextRun();
$textrun->addText('这里需要进行');
$text = $textrun->addText('注释');
//将注释链接到刚创建的文本上
$text->setCommentRangeStart($comment);
//也可以为注释设置起始位置
//$comment->setStartElement($text);

//原始文本添加注释

//导出注释版
$phpWord->save("/test/test2.docx");

1111.png

localStorage设置过期时间

//设置localStorage
function setLocalStorage(key, value) {
    var curtime = new Date().getTime(); // 获取当前时间 ,转换成JSON字符串序列
    var valueDate = JSON.stringify({
        val: value,
        timer: curtime
    });
    try {
        localStorage.setItem(key, valueDate);
    } catch(e) {
        // 兼容性写法
        if(isQuotaExceeded(e)) {
            console.log("Error: 本地存储超过限制");
            localStorage.clear();
        } else {
            console.log("Error: 保存到本地存储失败");
        }
    }
}

function isQuotaExceeded(e) {
    var quotaExceeded = false;
    if(e) {
        if(e.code) {
            switch(e.code) {
                case 22:
                    quotaExceeded = true;
                    break;
                case 1014: // Firefox
                    if(e.name === 'NS_ERROR_DOM_QUOTA_REACHED') {
                        quotaExceeded = true;
                    }
                    break;
            }
        } else if(e.number === -2147024882) { // IE8
            quotaExceeded = true;
        }
    }
    return quotaExceeded;
}

//获取localStorage
function getLocalStorage(key, day=1) {
    var exp = 60 * 60 * day; // 一天的秒数
    exp = exp*1000;
    if(localStorage.getItem(key)) {
        var vals = localStorage.getItem(key); // 获取本地存储的值
        var dataObj = JSON.parse(vals); // 将字符串转换成JSON对象
        // 如果(当前时间 - 存储的元素在创建时候设置的时间) > 过期时间
        var isTimed = (new Date().getTime() - dataObj.timer) > exp;
        if(isTimed) {
            console.log("存储已过期");
            localStorage.removeItem(key);
            return null;
        } else {
            var newValue = dataObj.val;
        }
        return newValue;
    } else {
        return null;
    }
}

利用canvas给网页添加文字水印

    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);
}