方法一 -------------------------------------------------------------------------------
vim /etc/yum.repos.d/utterramblings.repo
输入
[utterramblings]
name=Jason's Utter Ramblings Repo
baseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka
最后
yum update php -y
现在我用的 就是通过 这种方式装的,升级之后版本
php-5.2.11
httpd-2.2.14
方法二 -------------------------------------------------------------------------------
Yum升级mysql5.1和php5.2(禁止php5.3)
给yum安装rpmforge:
http://wiki.centos.org/AdditionalResources/Repositories/RPMForge
yum list mysql php 发现都是最新版本了,看来标准的yum源没有更新
wget http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-3.noarch.rpm
wget http://rpms.famillecollet.com/el5.i386/remi-release-5-7.el5.remi.noarch.rpm
rpm -Uvh remi-release-5-7.el5.remi.noarch.rpm epel-release-5-3.noarch.rpm
yum --enablerepo=remi list mysql
发现可以升级到 mysql 5.1.44-1.el5.remi
yum --enablerepo=remi update mysql
发现需要把php也一并升级到 5.3,
而zend optimizer 目前不支持 Php5.3,于是需要禁止升级php5.3
vi /etc/yum.conf
最后一行增加
exclude=php*5.3*
然后再yum --enablerepo=remi update mysql,就看不到php的升级了
# mysql -V 升级到5.1.44了
mysql Ver 14.14 Distrib 5.1.44, for redhat-linux-gnu (i686) using readline 5.1
升?mysql 5.1.41-1之後,??行下列?作:
(1)?原有的/etc/my.cnf?份,?/etc/my.cnf.rpmnew改 ?my.cnf
(2)升?table
mysql_upgrade -p
(3)自?修?table
mysqlcheck --all-databases --check-upgrade --auto-repair -p
找到一个yum源,有php5.2,方法如下:
http://www.webtatic.com/blog/2009/06/php-530-on-centos-5/
rpm --import http://repo.webtatic.com/yum/RPM-GPG-KEY-webtatic-andy
wget -P /etc/yum.repos.d/ http://repo.webtatic.com/yum/webtatic.repo
yum --enablerepo=webtatic list php
发现有php5.2 和 php5.3可以升级,
我们禁止升级php5.3
vi /etc/yum.conf
最后一行增加
exclude=php*5.3*
或者:
yum --enablerepo=webtatic --exclude=php*5.3* list php
yum --enablerepo=webtatic --exclude=php*5.3* update -y php
[root@www.ctohome.com backup]# php -v
PHP 5.2.12 (cli) (built: Dec 17 2009 19:40:56)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies
with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies
with Zend Optimizer v3.3.3, Copyright (c) 1998-2007, by Zend Technologies

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


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