How to install PHP pcntl extension under linux

1. Download the same version of php (mine is php5.5.10, the one I downloaded is php5.5.10)

[root@CentOS6 lamp]# wget http://hk1.php.net/get/php-5.5.10.tar.gz
/from/this/mirror

If your php version is different, please change it to wget http://hk1.php.net/get/php-x.x.xx.tar.gz/from/this/mirror

2. Unzip php:

[root@CentOS6 lamp]# tar -zxvf mirror

3. Enter php/ext/pcntl/

[root@CentOS6 php-5.6.28]# cd ext/pcntl/

4. Execute the command phpize

[root@CentOS6 pcntl]# /usr/bin/phpize 
Configuring for:
PHP Api Version:         20131106
Zend Module Api No:      20131226
Zend Extension Api No:   220131226

5. Execute Configuration command php-config

[root@CentOS6 pcntl]# ./configure --with-php-config=/usr/bin/php-config

6, compile make && make install

[root@CentOS6 pcntl]# make && make install

may report an error:

Installing shared extensions: /usr/lib/php/modules /
make: Warning: Clock error detected. Your creation may be incomplete.

Solution:

Enter the php-5.6.28 directory

sed -i 's|PHP_FE_END|{NULL,NULL,NULL}|' ./ext/**/*.c
sed -i 's|ZEND_MOD_END|{NULL,NULL,NULL}|' ./ext/**/*.c

Recompile:

[root@CentOS6 pcntl]# make && make install
[root@CentOS6 pcntl]# make installInstalling shared extensions:    
 /usr/lib/php/modules/

7. Modify php.ini to support pcntl

[root@CentOS6 pcntl]# echo "extension=pcntl.so" >> /etc/php.ini

8. Check phpinfo() to see if there is a pcntl extension;

Related recommendations:
About pcntl_fork in php multi-process Detailed introduction

Share PHP-pcntl to implement multi-process code

PHP uses pcntl and libevent to implement Timer function

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