安装swoole

若使用pecl或编译安装swoole时，出现如下类似错误，

undefined symbol: __builtin_saddl_overflow

1	undefined symbol: __builtin_saddl_overflow

则需要升级下gcc(达到5.0以上版本)：

sudo yum install -y yum-utils  centos-release-scl
sudo yum -y --enablerepo=centos-sclo-rh-testing install devtoolset-7-gcc
echo "source /opt/rh/devtoolset-7/enable" | sudo  tee -a /etc/profile
source /opt/rh/devtoolset-7/enable
gcc --version

sudo yum install -y yum-utils centos-release-scl

sudo yum -y --enablerepo=centos-sclo-rh-testing install devtoolset-7-gcc

echo "source /opt/rh/devtoolset-7/enable" | sudo tee -a /etc/profile

source /opt/rh/devtoolset-7/enable

gcc --version

【摘自：】https://forum.phalconphp.com/discussion/17595/problem-with-compiled-phalcon-with-php-721

安装swoole时可能出现的错误

错误内容类似如下：

define UNEXPECTED(condition) __builtin_expect(!!(condition), 0)

1	define UNEXPECTED(condition) __builtin_expect(!!(condition), 0)

解决方式：

sudo yum install centos-release-scl
sudo yum install devtoolset-7
scl enable devtoolset-7 bash

sudo yum install centos-release-scl

sudo yum install devtoolset-7

scl enable devtoolset-7 bash

【摘自：】https://github.com/swoole/swoole-src/issues/2119

PS, 用 pecl install swoole 时，使用默认安装配置项比较容易成功

yum安装PHP7

The CentOS 7 official software repositories have PHP 5.4 which has reached the end of life and no longer actively maintained by the developers.

To keep up with the latest features and security updates, you need a newer (probably the latest) version of PHP on your CentOS 7 system.

For the purpose of this guide, we will be operating the system as root, if that is not the case for you, make use of the sudo command to acquire root privileges.

Installing PHP 7 on CentOS 7

1. To install PHP 7, you have to install and enable EPEL and Remi repository on your CentOS 7 system with the commands below.

# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
# yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

1 2	# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm # yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

2. Next, you need to install yum-utils, a collection of useful programs for managing yum repositories and packages. It has tools that basically extend yum’s default features.

It can be used for managing (enabling or disabling) yum repositories as well as packages without any manual configuration and so much more.

# yum install yum-utils

1	# yum install yum-utils

3. One of the programs provided by yum-utils is yum-config-manager, which you can use to enable Remirepository as the default repository for installing different PHP versions as shown.

# yum-config-manager --enable remi-php70   [<strong>Install PHP 7.0</strong>]

1	# yum-config-manager --enable remi-php70 [<strong>Install PHP 7.0</strong>]

If you want to install PHP 7.1, PHP 7.2 or PHP 7.3 on CentOS 7, just enable it as shown.

# yum-config-manager --enable remi-php71   [<strong>Install PHP 7.1</strong>]
# yum-config-manager --enable remi-php72   [<strong>Install PHP 7.2</strong>]
# yum-config-manager --enable remi-php73   [<strong>Install PHP 7.3</strong>]

# yum-config-manager --enable remi-php71 [Install PHP 7.1]

# yum-config-manager --enable remi-php72 [Install PHP 7.2]

# yum-config-manager --enable remi-php73 [Install PHP 7.3]

4. Now install PHP 7 with all necessary modules with the command below.

# yum install php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo

1	# yum install php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo

Afterwards, double check the installed version of PHP on your system.

# php -v

# php -v

Check PHP Version in CentOS 7

【原文：】https://www.tecmint.com/install-php-7-in-centos-7/

PhpStorm中terminal修改为git bash后git log中文显示问题修复

找到GitBash安装目录，找到Git\etc\bash.bashrc文件（如：D:\Program Files\Git\etc\bash.bashrc），在文件末尾添加：

<span class="hljs-comment"># support chinese</span>
<span class="hljs-built_in">export</span> LANG=<span class="hljs-string">"zh_CN.UTF-8"</span>
<span class="hljs-built_in">export</span> LC_ALL=<span class="hljs-string">"zh_CN.UTF-8"</span>

# support chinese

export LANG="zh_CN.UTF-8"

export LC_ALL="zh_CN.UTF-8"

在PhpStorm设置 Tools->Terminal->Shell path 为如： D:\Program Files\Git\bin\bash.exe 这样的路径。
重新打开Terminal即可生效。

【原文：】https://xeylon.com/tools/136.html

YII2中 ActiveForm里的field怎么可以输出时间而不是时间戳？

class XXX extends \yii\db\ActiveRecord
{
    public function rules()
    {
        return [
        
            ...other rules...
            
            ['time', function($attr, $params) {
                if ($this->hasErrors()) return false;

                $datetime = $this->{$attr};
                
                $time = strtotime($datetime);
                // 验证时间格式是否正确
                if ($time === false) {
                    $this->addError($attr, '时间格式错误.');
                    return false;
                }
                // 将转换为时间戳后的时间赋值给time属性
                $this->{$attr} = $time;
                return true;
            }],
        ];
    }

    ...others...
    
    /**
     * 从数据库中 find() 数据后将 time 格式化。
     */
    public function afterFind()
    {
        parent::afterFind();
        $this->time = date('Y-m-d', $this->time);
    }

class XXX extends \yii\db\ActiveRecord

{

public function rules()

{

return [

...other rules...

['time', function($attr, $params) {

if ($this->hasErrors()) return false;

$datetime = $this->{$attr};

$time = strtotime($datetime);

// 验证时间格式是否正确

if ($time === false) {

$this->addError($attr, '时间格式错误.');

return false;

}

// 将转换为时间戳后的时间赋值给time属性

$this->{$attr} = $time;

return true;

}],

];

}

...others...

/**

* 从数据库中 find() 数据后将 time 格式化。

public function afterFind()

{

parent::afterFind();

$this->time = date('Y-m-d', $this->time);

}

【摘自：https://segmentfault.com/q/1010000009408189】

PHP Socket 实现 TCP、UDP 报文的发送与接收

【原文链接：https://blog.zhengxianjun.com/2015/05/php-socket/】

利用 PHP Socket 相关函数实现 TCP、UDP 端口监听。

需要注意，下面的示例代码中没有处理 Socket 错误。实际应用场景中每一步 Socket 的连接、写入、读取都需要进行错误判断和处理，相应的函数 socket_connect、socket_write、socket_read 以及 socket_bind、socket_listen 返回 false 时，需要调用 socket_last_error() 获取最新的 socket 错误号 $errno，并通过 socket_strerror($errno) 获取错误号对应的能够阅读的错误描述信息。继续阅读“PHP Socket 实现 TCP、UDP 报文的发送与接收”

Mac下PHP版本切换

终端下的PHP版本切换

方法一：

编辑 ~/.bash_profile文件，添加以下类似内容（更换成具体要用的php）

export PATH=/usr/local/Cellar/php71/7.1.20/bin:$PATH

1	export PATH=/usr/local/Cellar/php71/7.1.20/bin:$PATH

方法二：

将要用的php软连接到/usr/local/bin目录：

ln -s usr/local/Cellar/php71/7.1.20/bin/php /usr/bin/

1	ln -s usr/local/Cellar/php71/7.1.20/bin/php /usr/bin/

测试：

执行以下命令查看php版本：

php -v

php -v

php-fpm 下的PHP版本切换

将php目录下的plist文件软连接/拷贝到 ~/Library/LaunchAgents目录下，并load:

# Swapping from PHP 5.5 to PHP 7.1
# $HOMEBREW_PREFIX is normally `/usr/local`
$ cp $HOMEBREW_PREFIX/Cellar/php71/7.1.11/homebrew.mxcl.php71.plist ~/Library/LaunchAgents/
$ launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.php55.plist
$ launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.php71.plist

# Swapping from PHP 5.5 to PHP 7.1

# $HOMEBREW_PREFIX is normally `/usr/local`

$ cp $HOMEBREW_PREFIX/Cellar/php71/7.1.11/homebrew.mxcl.php71.plist ~/Library/LaunchAgents/

$ launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.php55.plist

$ launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.php71.plist

测试：

用浏览器访问www目录下的包含phpinfo()内容的php文件，查看php版本

【内容参考：】https://github.com/kyslik/homebrew-php/

添加获取对象实例不存在的属性

一般情况下，只能给对象中声明的属性赋值、获取。若想给对象实例动态添加/获取一不存在的属性，需要修改__set(), __get()方法：

<?php

class User
{
	private $name;
	private $extend_property=[];//保存不存在的属性

	public function __set($name, $value){
		if(!property_exists('User', $name)){
				$this->extend_property[$name] = $value;
		}else{
			$this->name = $value;
		}
		
	}

	public function __get($name){
		if(!property_exists('User', $name)){
			return $this->extend_property[$name]??null;//不存在时返回null
		}else{
			return $this->name;
		}
		
	}

}

$user = new User();
$user->class_name = '软件一班';
var_dump($user->class_name);

<?php

class User

{

private $name;

private $extend_property=[];//保存不存在的属性

public function __set($name, $value){

if(!property_exists('User', $name)){

$this->extend_property[$name] = $value;

}else{

$this->name = $value;

}

public function __get($name){

if(!property_exists('User', $name)){

return $this->extend_property[$name]??null;//不存在时返回null

}else{

return $this->name;

}

$user = new User();

$user->class_name = '软件一班';

var_dump($user->class_name);

PHP回顾之创建自己的Composer包

前文 PHP回顾之Composer 简要介绍了Composer的相关概念和简要用法，应付日常开发已无大碍。想要更好的利用Composer协同工作，学会创建自己的Composer包是一项必不可少的技能。本文先讲解Composer仓库的概念，再给出创建和发布Composer包的步骤。

【原文链接：https://tlanyan.me/php-review-create-self-composer-package/】

分类：PHP