How to add pcntl extensions to php in Linux
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Pcntl extension can support multithreaded operation of php (linux systems only)
There are two ways to load pcntl
A recompile installation that is added at compile time, configrue prompt plus-- enable-pcntl
. / configure-- prefix=/usr/local/php-- with-mysql=/usr/local/mysql-- with-apxs2=/usr/local/apache/bin/apxs-- enable-pcntl another extra mount
Since my php is installed using yum, I cannot use the first method
Here is a way for php to add extensions dynamically, phpize.
1. First take a look at the directory where the phpize command is located (my directory / usr/bin/phpize)
Perform the installation if it is not found
Yum install php53_devel (please pay attention to your version)
After the installation. A phpize command is generated
2. Go to php.net to download the corresponding version of the php source file
Http://php.net/releases/index.php
Let's take php-5.3.17 as an example. After decompression, enter the corresponding module.
Cd / php-5.3.17/ext/pcntl
# execute phpize first
/ usr/bin/phpize
. / configure-- with-php-config=/usr/bin/php-config (please specify the directory of php-config correctly)
# compile and install
Make & & make install
A mistake was made at this time.
. / configure compilation is normal, but make error
Error: 'PHP_FE_END' undeclared here (not in a function)
Solution:
There is an error in the source code. Enter the php-5.3.17 directory.
Sed-I's | PHP_FE_END | {NULL,NULL,NULL} |'. / ext/**/*.c
Sed-I's | ZEND_MOD_END | {NULL,NULL,NULL} |'. / ext/**/*.c
Make & & make install again
3. After compilation, a pcntl.so file will be generated. In the model directory of php
Cd / root/php-5.3.17/ext/pcntl/modules
Ls-l pcntl.so
-rwxr-xr-x 1 root root 82375 April 1 11:38 pcntl.so
Edit / etc/php.ini, join
Extension=pcntl.so
4. Restart apache and php
Service httpd restart
/ etc/init.d/php-fpm restart
5. Test whether the installation is successful
Write a php homepage file in the webpage directory as follows
Output: 23165 proves that the installation is successful
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