分类目录归档:PHP

PHP实现姓名和手机号星号*替换

实现mb_substr_replace

   function mb_substr_replace($string, $replacement, $start, $length = null, $encoding = null)
    {
        if (extension_loaded('mbstring') === true) {
            $string_length = (is_null($encoding) === true) ? mb_strlen($string) : mb_strlen($string, $encoding);

            if ($start < 0) {
                $start = max(0, $string_length + $start);
            } else if ($start > $string_length) {
                $start = $string_length;
            }

            if ($length < 0) {
                $length = max(0, $string_length - $start + $length);
            } else if ((is_null($length) === true) || ($length > $string_length)) {
                $length = $string_length;
            }

            if (($start + $length) > $string_length) {
                $length = $string_length - $start;
            }

            if (is_null($encoding) === true) {
                return mb_substr($string, 0, $start) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length);
            }

            return mb_substr($string, 0, $start, $encoding) . $replacement . mb_substr($string, $start + $length, $string_length - $start - $length, $encoding);
        }

        return (is_null($length) === true) ? substr_replace($string, $replacement, $start) : substr_replace($string, $replacement, $start, $length);
    }

用户名星号替换

替换样例:

  • 马克思:马*思
  • 马思:*思
  • 马列主义:马*义
    public function getMaskName()
    {
        if (mb_strlen($this->name) > 2) {
            return mb_substr_replace($this->name, '*', 1, -1);
        } else {
            return mb_substr_replace($this->name, '*', 0, -1);
        }
    }

手机号星号替换

替换样例:

  • 12345679878:123***878
    public function getMaskMobile()
    {
        return substr_replace($this->mobile, '***', 3, -3);
    }

PHP7.3 zts(线程安全)编译以及多线程(pthreads)使用

下载PHP

下载地址:https://www.php.net/downloads.php,开始下载:

su root
mkdir tmp
cd tmp
wget https://www.php.net/distributions/php-7.3.7.tar.bz2

编译安装PHP开启线程安全

tar -jxvf php-7.3.7.tar.bz2
cd php-7.3.7
yum -y install libxml2 libxml2-devel openssl openssl-devel curl-devel libjpeg-devel libpng-devel freetype-devel libicu-devel

编译

./configure \
--prefix=/usr/local/php-7.3.7-ts \
--enable-maintainer-zts \
--enable-fpm \
--with-fpm-user=www \
--with-fpm-group=www \
--enable-bcmath \
--enable-exif \
--enable-intl \
--enable-mbstring \
--enable-pcntl \
--with-pdo-mysql \
--enable-sockets \
--enable-mysqlnd \
--with-gd

然后:

make && make install

更新autoconf

Autoconf version 2.68 or higher is required错误是才需要此步骤

wget http://ftp.gnu.org/gnu/autoconf/autoconf-latest.tar.gz
tar -zxvf autoconf-latest.tar.gz 
cd autoconf-2.69/
.configure
make
make install
autoconf --version 

安装pthreads

git clone https://github.com/krakjoe/pthreads.git
cd pthreads
/usr/local/php-7.3.7-ts/bin/phpize
./configure --with-php-config=/usr/local/php-7.3.7-ts/bin/php-config
make
make install

修改 /usr/local/php-7.3.7-ts/lib/php.ini,增加 extension=pthreads

测试pthreads

/usr/local/php-7.3.7-ts/bin/php worker.php

<?php

class MyWorker extends Worker
{
    public $id;
    public $time;

    public function __construct($id, $time)
    {
        $this->id = $id;
        $this->time = $time;
    }

    public function run()
    {
        while (true) {
            echo sprintf(worker %s is running, %s\n, $this->id, date('Y-m-d H:i:s'));
            sleep($this->time);
        }
    }
}

class MyManager
{
    /**
     * @var MyWorker[]
     */
    protected $workers;

    public function add(MyWorker $work)
    {
        $this->workers[$work->id] = $work;
        echo 'add worker' . $work->id . \n;
    }

    public function run()
    {
        foreach ($this->workers as $id => $work) {
            echo 'run worker' . $work->id . \n;
            $work->start();
        }
    }
}

$manager = new MyManager();
$manager->add(new MyWorker('1', 1));
$manager->add(new MyWorker('2', 3));
$manager->run();

Imagick给图片加文字和二维码

    // 初始化画布
    set_time_limit(0);
    $bg_file = Yii::getAlias('@frontend/web/test/wxbg.jpg');
    $image = new \Imagick($bg_file);

    // 写字
    $font_file = Yii::getAlias('@frontend/web/test/msyhbd.ttc');
    $draw = new \ImagickDraw();
    $draw->setFillColor('#FF7F24');
    $draw->setFont($font_file);
    $draw->setFontSize(64);
    $draw->setTextKerning(5);
    $draw->setFontWeight(700);
    $draw->setTextEncoding('UTF-8');
    $metrics = $image->queryFontMetrics($draw, $name);
    $draw->annotation(158, 50 + $metrics['ascender'], $name);
    $image->drawImage($draw);

    // 二维码
    $qr_image = new \Imagick(Yii::getAlias('@frontend/web/test/qr.png'));
    $qr_image->scaleImage(248, 248);
    $image->compositeImage($qr_image, \Imagick::COMPOSITE_COPY, 254, 504);

    // 返回
    $response = Yii::$app->getResponse();
    $response->format = Response::FORMAT_RAW;
    $response->headers->set('Content-Type', 'image/jpeg');
    $response->data = $image->getImageBlob();
    return $response->send();

Yii2按需加载js,css文件,并自动加上时间戳

网上找遍了国内和国外的资料,没有能够为动态增加的文件加上时间戳的,进过分析Yii2源码,发现其实非常简单:

开启assetManager支持自动加上时间戳

修改main.php

    'assetManager' => [
        'appendTimestamp' => true,
    ],

按需加载js,css

$bundle=AppAsset::register($this);
$bundle->js[]='js/windowview.js';
$bundle->css[]='css/robot.css';

Yii2设置变量到布局layout

通过全局params配置

Yii::$app->params['myVar']

通过session

Yii::app()->session['myvar']

或者通过Flash Message

通过控制器传递变量方式

首先,需要再控制器添加参数

class SiteController extends CController {

    public $myvar;
//...

然后在layout/main.php获取控制器变量

$this->context->myvar
Yii::$app->controller->myvar

Yii2 文件上传扩展

官方指南

aminkt/yii2-upload-manager

Upload manager system based and inspired from WordPress upload manager.

yii2-image-manager

A module/widget for upload, manage and cropping images

yii2-attachments

Extension for file uploading and attaching to the models

yii2-widget-fileinput

An enhanced FileInput widget for Bootstrap 3.x with file preview, multiple selection, and more features

yii2-file-input-widget

Jasny File Input Bootstrap Widget + Local and Remote storage

yii2-file-upload

PHP library for uploading files to your server or Amazon S3

yii2-upload-file

Yii2 tools for upload file

给Yii composer提速

Yii 2 的 2.1x版本后,采用asset-packagist.org给bower提速,效果明显,旧版本Yii要升级到新版本可以采用以下步骤:

修改 composer.json

  "config": {
    "process-timeout": 1800,
    "fxp-asset": {
      "enabled": false
    }
  },
  "repositories": [
    {
      "type": "composer",
      "url": "https://asset-packagist.org"
    }
  ]

修改config/main.php

'aliases' => [
    '@bower' => '@vendor/bower-asset',
    '@npm'   => '@vendor/npm-asset',
],

清理composer并运行

composer clear-cache
composer install

解决nginx+php/java/go/python+mysql下time_wait连接数过多问题

查看连接数

netstat -n |  wc -l # 总连接数
netstat -n | grep -i time_wait | wc -l # time_wait 连接数
netstat -anp # 查看占用端口过多的程序

tcp复用解决方案

网上大部分解决方案是修改sysctl.conf回收重用ipv4连接,但是可能带来其他问题

net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time = 600

nginx fastcgi(php) 解决方案

修改nginx.conf

upstream fastcgi_backend {
    server 127.0.0.1:9000;
    keepalive 60;
}

location ~ \.php$ {
        fastcgi_pass  fastcgi_backend;
        fastcgi_keep_conn on;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include        fastcgi_params;
}

主要是 fastcgi_keep_conn onupstreamkeepalive

nginx + proxy (python/go/java) 解决方案

upstream wxpic {
    keepalive 60;
    server 127.0.0.1:xxx;
}

server {
    keepalive_requests 10000; # 默认100
    location / {
        proxy_http_version 1.1;
        proxy_set_header Connection "";
    }
}

主要是 proxy_http_version, proxy_set_header Connection ""以及keepalive_requests

mysql/数据库连接解决方案

修改yii数据库配置采用长链接

'db' => [ 
    'class' => 'yii\db\Connection',
    'dsn' => '*', 'username' => '*', 
    'password' => '*', 
    'charset' => 'utf8mb4', 
    'attributes' => [ 
       PDO::ATTR_PERSISTENT => true 
    ]
],