升级
目前php最新版虽然是php5.5,但出于各种考虑,还是先升到php5.4比较靠谱。
原php使用的是php5.2.10,已经运行了4~5年了,是时候升级了。
5.4最新稳定版是5.4.21(14 Nov 2013发布了5.4.22...)
代码如下:
wget http://cn2.php.net/get/php-5.4.21.tar.gz/from/this/mirror
tar zxf php-5.4.21.tar.gz
cd php-5.4.21
修改源码,如果程序编码是utf-8的,跳过此步骤。
如果你的程序默认是GBK,而且程序中有不少使用htmlspecialchars的,建议直接修改源码,因为5.4默认为utf-8了。用htmlspecialchars输出的都会是空。
代码如下:
ext/standard/html.c
line 372
/* Default is now UTF-8 */
if (charset_hint == NULL)
return cs_utf_8;
--->
/* Default is now UTF-8 */
if (charset_hint == NULL)
return cs_8859_1;
解决htmlspecialchars默认UTF-8的问题。
代码如下:
./configure --prefix=/usr/local/php5.4 --with-zlib --enable-bcmath --with-curl --with-curlwrappers --enable-mbregex --enable-mbstring --with-gd --enable-gd-native-ttf --with-openssl --with-mhash --enable-sockets --with-xmlrpc --enable-zip --enable-soap --without-pear --with-mysql --with-mysqli --with-pdo-mysql --enable-ftp --with-jpeg-dir --with-freetype-dir --with-png-dir --enable-fpm --with-fpm-user=www --with-fpm-group=www
较精简的安装参数:
代码如下:
./configure --prefix=/usr/local/php5.4 --enable-fpm --with-mysql
make ZEND_EXTRA_LIBS='-liconv'
make install
-----------------------
把两个默认文件移到正确的地方,php.ini-development或php.ini-production看情况。
代码如下:
cd /usr/local/php5.4/etc/
cp php-fpm.conf.default php-fpm.conf
cp /www/soft/php-5.4.21/php.ini-development /usr/local/php5.4/lib/php.ini
------------------------------
php-fpm.conf中
listen.allowed_clients = 127.0.0.1前面的;去掉
---------------------
php.ini中
代码如下:
short_open_tag = Off
改为
代码如下:
short_open_tag = On
代码如下:
;date.timezone =
改为
代码如下:
date.timezone = "Asia/Shanghai"
代码如下:
error_reporting = E_ALL
改为
代码如下:
error_reporting = E_ALL & ~E_NOTICE
添加到开机服务列表
代码如下:
cp -f /www/soft/php-5.4.21/sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
chmod 755 /etc/init.d/php-fpm
chkconfig --add php-fpm
chkconfig php-fpm on
启动php-fpm:
代码如下:
service php-fpm start
php升级完成!
------------------------------------------------------
装ZendOpcache,据维护者Laruence称,Zend Opcache, 它是一个以扩展形式提供的PHP的Optmizer, 也会做很多编译优化, 也没有兼容性问题. 相比APC, 也要快7%以上. 不过它不提供apc_store用户数据Cache。如要使用apc的user cache,可以考虑使用APCU或者Laruence的Yac一起搭配使用。
代码如下:
wget http://pecl.php.net/get/ZendOpcache
tar zxf ZendOpcache
cd zendopcache-7.0.2/
/usr/local/php5.4/bin/phpize
./configure --with-php-config=/usr/local/php5.4/bin/php-config
make
make install
Installing shared extensions: /usr/local/php5.4/lib/php/extensions/no-debug-non-zts-20100525/
php.ini里直接加到底部,官方建议参数
代码如下:
zend_extension= /usr/local/php5.4/lib/php/extensions/no-debug-non-zts-20100525/opcache.so
opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.revalidate_freq=60
opcache.fast_shutdown=1
opcache.enable_cli=1
opcache.save_comments=0
opcache.enable_file_override=1
service php-fpm reload
这里phpinfo()里就有with Zend OPcache v7.0.2,以及不少相关的参数了。
这样php5.4就算升级完了。
--------------------------------
可能碰到的错误:
启动php-fpm失败
代码如下:
Starting php-fpm /etc/init.d/php-fpm: line 53: 12483 Segmentation fault $php_fpm_BIN --daemonize $php_opts
failed
同时安装了APC和Zend opcache导致冲突,有了Zend opcache,可以不用装APC了。

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Atom editor mac version download
The most popular open source editor