Introduction to PHP extension development experience

In the PHP development process, sometimes you need to select an extension method to improve the performance. This article briefly introduces how to develop a simple PHP extension to unlock the mysterious environment of PHP extension development: PHP 5.2.14 CentOS 5.5

Step 1: Create an extension skeleton

Cd php-5.2.14/ext
./Ext_skel-extname = laiwenhui

Step 2: modify compilation parameters

Cd php-5.2.14/ext/laiwenhui
Vi config. m4

Remove

PHP_ARG_ENABLE (laiwenhui, whether to enable laiwenhui support,

[-- Enable-laiwenhui Enable laiwenhui support])

Dnl before two rows

After modification:

The code is as follows:

Dnl Otherwise use enable:
PHP_ARG_ENABLE (laiwenhui, whether to enable laiwenhui support,
Dnl Make sure that the comment is aligned:
[-- Enable-laiwenhui Enable laiwenhui support])

Step 3: write code

Vim php_laiwenhui.h

Add PHP_FUNCTION (confirm_laiwenhui_compiled); followed by PHP_FUNCTION (test );

After adding:

PHP_FUNCTION (confirm_laiwenhui_compiled);/* For testing, remove later .*/
PHP_FUNCTION (test );

Then

Vim laiwenhui. c

Add PHP_FE (test, NULL) to PHP_FE (confirm_laiwenhui_compiled, NULL)

After adding:

The code is as follows:

Zend_function_entry laiwenhui_functions [] = {
PHP_FE (confirm_laiwenhui_compiled, NULL)/* For testing, remove later .*/
PHP_FE (test, NULL)/* For testing, remove later .*/
{NULL, NULL, NULL}/* Must be the last line in laiwenhui_functions [] */
};

Add the following code at the end of the file:

The code is as follows:

PHP_FUNCTION (test)
{
Char * arg = "This my first extention !";
Int len;
Char * strg;
Len = spprintf (& strg, 0, "% s \ n", arg );
RETURN_STRINGL (strg, len, 0 );
}

Step 4: compile the code

The code is as follows:

Cd php-5.2.6/ext/laiwenhui
/Opt/module/php/bin/phpize
./Configure-with-php-config =/opt/module/php/bin/php-config
Make
Make install

My PHP installation path is/opt/module/php
This will generate a file/opt/module/php/lib/php/extensions/no-debug-non-zts-20060613/laiwenhui. so

Edit the PHP configuration file php. ini and add extensions:

Vim php. ini

Added extension = laiwenhui. so in the [PHP] module.

; Extension = php_zip.dll
Extension = laiwenhui. so

Modify extension_dir in the php. ini file to this directory:
Extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20060613 /"

; Directory in which the loadable extensions (modules) reside.
Extension_dir = "/opt/module/php/lib/php/extensions/no-debug-non-zts-20060613 /"

Step 5: check the installation result

1. restart apache or php-fpm
2. check whether laiwenhui extensions are included in/opt/module/php/bin/php-m.
Step 6: execute the test code

Create test. php in the root directory of the website

Vim test. php

The code is as follows:

Echo test ();
?>

The result is: This my first extention!

If you can successfully complete the above steps, congratulations on completing the first extension.

The above is a simple step to expand PHP. For more information, see: