Php extension development tutorial

PHP extension development is not something that all developers can operate on. I will demonstrate the implementation process of PHP extension development. If you need it, please refer to it.

Let's assume that we need such an extension to provide a function named tao_string. Its main function is to return a certain character. The corresponding PHP code may be like this:

The Code is as follows:	Copy code
Function tao_string ($ str ){ $ Result = $ str; Return $ result; }

Step 1: generate code
PHP provides an ext_skel tool similar to the code generator for the convenience of extension development. For details, see the official description of php.net (https://svn.php.net/repository/php/php-src/trunk/README.EXT_SKEL ).

Create a file tao. skel whose content is

String tao_string (string str)

This is to tell the ext_skel. The extension we want to do has a function named tao_string. Then execute

The Code is as follows:	Copy code
Cd MooENV/src/php-5.3.8/ext/ ./Ext_skel -- extname = tao -- proto = tao. skel Cd tao/

At this time, tao's extended code framework has come out.

Step 2: modify the configuration
Modify the config. m4 file and delete the dnl at the beginning of lines 10, 11, and 12.

The Code is as follows:	Copy code
Dnl PHP_ARG_WITH (tao, for tao support, Dnl Make sure that the comment is aligned: Dnl [-- with-tao Include tao support]) Change PHP_ARG_WITH (tao, for tao support, Make sure that the comment is aligned: [-- With-tao Include tao support])

Step 3: Implement Functions
Modify the source tao. c file
Find and change the tao_string function

The Code is as follows:	Copy code
PHP_FUNCTION (tao_string) { Char * str = NULL; Int argc = ZEND_NUM_ARGS (); Int str_len; Char * result; If (zend_parse_parameters (argc TSRMLS_CC, "s", & str, & str_len) = FAILURE) Return; Str_len = spprintf (& result, 0, "wo shi %. 78 s", str ); RETURN_STRINGL (result, str_len, 0 ); }

Step 4: Compile the extension
After saving, start compiling

The Code is as follows:	Copy code
/Usr/local/php/bin/phpize ./Configure -- with-php-config =/usr/local/php/bin/php-config Make

Step 5: add an extension
At this time, if everything goes well, the extension is already in the position of modules/tao. so. The following is how to add this extension to PHP so that the PHP program can call it.

The Code is as follows:	Copy code
Cp modules/tao. so/usr/local/php/ext/ Vim/usr/local/php/etc/php. ini Extension =/usr/local/php/ext/tao. so # Add this line at the end of the php. ini file. Service php-fpm restart # restart the PHP service Cp tao. php/data/www/wwwroot/default/

Next, you can access the tao. php file and test it.