How to install extensions in php: 1. Use the apt or yum command to install the extension; 2. Use the pecl install command to install the extension; 3. Compile and install from source code; 4. Install through phpize.

The operating environment of this article: windows7 system, php5.3.29 version, DELL G3 computer

Several methods of php installation extension

Install the extension

Note

Different from the running mode of Apache PHP or Nginx PHP, WorkerMan runs based on the PHP command line PHP CLI , using different PHP executable programs, the php.ini file used may also be different. So when you print phpinfo() on the web page and see that a certain extension is installed, it does not mean that the corresponding extension is also installed in the PHP CLI on the command line.

How to determine which extensions are installed by PHP CLI

Running php -m will list the extensions that have been installed by the command line PHP CLI. The result is similar to the following:

~# php -m
[PHP Modules]
libevent
posix
pcntl
...

How to determine the location of the php.ini file of PHP CLI

When we install the extension, we may need to manually configure the php.ini file and add the extension, so we must confirm the php.ini file of PHP CLI s position. You can run php --ini to find the location of the ini file of the PHP CLI. The results are similar to the following (the results displayed by each system will be different):

~# php --ini
Configuration File (php.ini) Path: /etc/php5/cli
Loaded Configuration File:         /etc/php5/cli/php.ini
Scan for additional .ini files in: /etc/php5/cli/conf.d
Additional .ini files parsed:      /etc/php5/cli/conf.d/apc.ini,
/etc/php5/cli/conf.d/libevent.ini,
/etc/php5/cli/conf.d/memcached.ini,
/etc/php5/cli/conf.d/mysql.ini,
/etc/php5/cli/conf.d/pdo.ini,
/etc/php5/cli/conf.d/pdo_mysql.ini
...

Install the extension for the PHP CLI (install the memcached extension as Example)

Method 1. Install using apt or yum command

If PHP is installed via apt or yum command, the extension can also be installed via apt or yum

debian/ubuntu and other systems apt installation PHP extension method (non-root users need to add sudo command)

1. Use apt-cache search to find the extension package

~# apt-cache search memcached php
php-apc - APC (Alternative PHP Cache) module for PHP 5
php5-memcached - memcached module for php5

2. Use apt-get install to install the extension package

~# apt-get install -y php5-memcached
Reading package lists... Done
Reading state information... Done
...

centos and other systems yum to install the PHP extension method

1.Useyum searchFind the expansion package

~# yum search memcached php
php-pecl-memcached - memcached module for php5

2. Use yum install to install the expansion package

~# yum install -y php-pecl-memcached
Reading package lists... Done
Reading state information... Done
...

Instructions:

Using apt or yum to install the PHP extension will automatically configure the php.ini file. It can be used directly after installation, which is very convenient. The disadvantage is that some extensions do not have corresponding extension installation packages in apt or yum.

[Recommended learning: "PHP Video Tutorial"]

Method 2. Use pecl to install

Use the pecl install command Install extension

1, pecl installInstall

~# pecl install memcached
downloading memcached-2.2.0.tgz ...
Starting to download memcached-2.2.0.tgz (70,449 bytes)
....

2, Configure php.ini

By running php --ini Find the location of the php.ini file, and then add extension=memcached.so

to the file. Method 3. Source code compilation and installation (generally install the extension that comes with PHP, to install the pcntl extension as Example)

1. Use the php -v command to check the current PHP CLI version

~# php -v
PHP 5.3.29-1~dotdeb.0 with Suhosin-Patch (cli) (built: Aug 14 2014 19:55:20)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2014 Zend Technologies

2. Download the PHP source code according to the version

PHP Historical version download page: http://php.net/releases/

3. Unzip the source code compressed package

. For example, the name of the downloaded compressed package is php-5.3.29.tar .gz

~# tar -zxvf php-5.3.29.tar.gz
php-5.3.29/
php-5.3.29/README.WIN32-BUILD-SYSTEM
php-5.3.29/netware/
...

4. Enter the ext/pcntl directory in the source code

~# cd php-5.3.29/ext/pcntl/

5. Run the phpize command

~# phpize
Configuring for:
PHP Api Version:         20090626
Zend Module Api No:      20090626
Zend Extension Api No:   220090626

6. Run configureCommand

~# ./configure
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
...

7. Run make command

~# make
/bin/bash /tmp/php-5.3.29/ext/pcntl/libtool --mode=compile cc ...
-I/usr/include/php5 -I/usr/include/php5/main -I/usr/include/php5/TSRM -I/usr/include/php5/Zend...
...

8. Run make install command

~# make install
Installing shared extensions:     /usr/lib/php5/20090626/

9. Configure the ini file

Find the location of the php.ini file by running php --ini, and then add extension=pcntl.so## to the file

#Note: This method is generally used to install extensions that come with PHP, such as posix extensions and pcntl extensions. In addition to using phpize to compile an extension, you can also recompile the entire PHP and add the extension with parameters during compilation. For example, run

~# ./configure --enable-pcntl --enable-posix ...
~# make && make install

~# wget http://pecl.php.net/get/libevent-0.1.0.tgz
--2015-05-26 21:43:40--  http://pecl.php.net/get/libevent-0.1.0.tgz
Resolving pecl.php.net... 104.236.228.160
Connecting to pecl.php.net|104.236.228.160|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 9806 (9.6K) [application/octet-stream]
Saving to: “libevent-0.1.0.tgz”

100%[=======================================================>] 9,806       41.4K/s   in 0.2s

~# tar -zxvf libevent-0.1.0.tgz
package.xml
libevent-0.1.0/config.m4
libevent-0.1.0/CREDITS
libevent-0.1.0/libevent.c
....

~# cd libevent-0.1.0/

phpize command

~# phpize
Configuring for:
PHP Api Version:         20090626
Zend Module Api No:      20090626
Zend Extension Api No:   220090626

configure command

~# ./configure
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for a sed that does not truncate output... /bin/sed
checking for cc... cc
checking whether the C compiler works... yes
...

6、运行make命令

~# /bin/bash /data/test/libevent-0.1.0/libtool --mode=compile cc  -I. -I/data/test/libevent-0.1.0 -DPHP_ATOM_INC -I/data/test/libevent-0.1.0/include
...

7、运行make install命令

~# make install
Installing shared extensions:     /usr/lib/php5/20090626/

8、配置ini文件

通过运行 php --ini查找php.ini文件位置，然后在文件中添加extension=libevent.so

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