


First experience of compiling and installing CentOS PHP-5.4.8, centosphp-5.4.8_PHP tutorial
First experience of compiling and installing CentOS PHP-5.4.8, centosphp-5.4.8
1. Download version 5.4.8
[root@Test data ] wget http://museum.php.net/php5/php-5.4.8.tar.gz
2. Unzip
[root@Test php-5.4.8]# tar xzf php-5.4.8.tar.gz
3. Compile and install
[root@Test php-5.4.8]# cd php-5.4.8
[ root@Test php-5.4.8]# ./configure --prefix=/data/application/php && make && make install
The default configuration file path after installation by this method is:
[root@Test php-5.4.8]# cd /data/application/php/
[root@Testphp php]# ll
total 20
drwxr- xr-x 2 root root 4096 Mar 8 17:27 bin
drwxr-xr-x 2 root root 4096 Mar 8 17:46 etc
drwxr-xr-x 3 root root 4096 Mar 8 17:27 include
drwxr-xr-x 3 root root 4096 Mar 8 17:59 lib
drwxr-xr-x 3 root root 4096 Mar 8 17:27 php
View the configuration file information loaded after installation
[root@Testphp php]# php --ini
Configuration File (php.ini) Path: /data/application/php/ lib
Loaded Configuration File: (none)
Scan for additional .ini files in: (none)
Additional .ini files parsed: (none)
You can see that the default php.ini reads files in the /data/application/php/lib directory
At this time, you can copy the /data/php-5.4.8/php.ini-production file Go to this directory to load this configuration file
[root@Testphp php]# cp -a /data/php-5.4.8/php.ini-production /data/application/php/lib/ php.ini
[root@Testphp php]# php --ini
Configuration File (php.ini) Path: /data/application/php/lib
Loaded Configuration File: /data/application/php/lib/php.ini
Scan for additional .ini files in: (none)
Additional .ini files parsed: (none)
You can see that the configuration file has been loaded normally. Now check the modules loaded by php by default
[root@Testphp php]# php -m
[PHP Modules]
Core
ctype
date
dom
ereg
fileinfo
filter
hash
iconv
json
libxml
pcre
PDO
pdo_sqlite
Phar
posix
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
[Zend Modules]
If If you want to install an unloaded module, you can follow the steps below
[root@Testphp php]# cd /data/php-5.4.8/ext/
You can see there are many extension, take pcntl (php multi-process management module) as an example:
[root@Testphp ext]# cd pcntl
[root@Testphp php]# /data/application/php/ bin/phpize
[root@Testphp php]# ./configure --with-php-config=/data/application/php/bin/php-config && make && make install
At this time, a pcntl.so file will be generated, and the storage path is:
/data/application/php/lib/php/extensions/no-debug-non-zts-20100525/pcntl.so
Edit /data/application/php/lib/php.ini
[root@Testphp php]# vim /data/application/php/lib/php.ini
Add two lines Configuration:
extension_dir = "/data/application/php/lib/php/extensions/no-debug-non-zts-20100525/" (If it exists, only pcntl.so will be placed in this directory That's it)
extension=pcntl.so
At this time, check the module recorded in php again, and you can see that the newly installed pcntl has been loaded in
[root@Testphp php ]# php -m
[PHP Modules]
Core
ctype
date
dom
ereg
fileinfo
filter
hash
iconv
json
libxml
pcntl
pcre
PDO
pdo_sqlite
Phar
posix
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
[Zend Modules]
Other modules can refer to this solution. In particular, php.ini does not know include *.ini by default
[root @Test php-5.4.8]# ./configure --help |grep scan
--with-config-file-scan-dir=PATH
Set the path where to scan for configuration files
Additional configuration files can be placed in this directory. If not specified, they will not be loaded
[root@Test php-5.4.8]# php --ini
Configuration File (php.ini) Path: /data/application/php/lib
Loaded Configuration File: /data/application/php/lib/php.ini
Scan for additional .ini files in: (none)
Additional .ini files parsed: (none)
The following is the default configuration information of another machine using YUM installation method, which can be used as a comparison
[root@Test2 ~]# php --ini
Configuration File (php.ini) Path: /etc
Loaded Configuration File: /etc/php.ini
Scan for additional .ini files in: /etc/php.d
Additional .ini files parsed: /etc/php.d/bcmath.ini,
/etc/php.d/curl.ini,
/etc/php.d/dom.ini,
/etc/php.d/fileinfo.ini,
/etc/php.d/gd.ini,
/etc/php.d/imap.ini,
/etc/php.d/json.ini,
/etc/php.d/ldap.ini,
/etc/php.d/mbstring.ini,
/etc/php.d/mcrypt.ini,
/etc/php.d/mysql.ini,
/etc/php.d/mysqli.ini,
/etc/php.d/odbc.ini,
/etc/php.d/pdo.ini,
/etc/php.d/pdo_mysql.ini,
/etc/php.d/pdo_odbc.ini,
/etc/php.d/pdo_sqlite.ini,
/etc/php.d/phar.ini,
/etc/php.d/sqlite3.ini,
/etc/php.d/wddx.ini,
/etc/php.d/xmlreader.ini,
/etc/php.d/xmlrpc.ini,
/etc/php.d/xmlwriter.ini,
/etc/php.d/xsl.ini,
/etc/php.d/zip.ini

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.


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