PHP extension Hello Word

First, download the source code.

First to download PHP source code, here I use PHP5.3.5

Open we can see ext this directory This directory is put all the extensions. In the directory we can see the Ext_skel script below I use this command to build the basic architecture of the extension.

Ii. creation of a basic framework

./ext_skel--extname=example

This command will generate a example directory in the EXT directory with the following files in the directory.

#在目录下有不少文件, testmodule.c and CONFIG.M4 are the most important example.c             #是我们扩展的主要文件config. M4                    #m4是一个宏解释工具, The makefilecredites #这个文件没什么太大的作用 used to build our extension                    is just used to append some additional information to your extension experimental           #这个文件只是标志说, this extension is experimental, So you don't have to worry about it. php_example.h    #这个是我们扩展的头文件tests/001.phpt           #这个也是个测试文件, but using unit tests, phase testing

Third, the realization.

1, modify the configuration file Config.m4, remove the previous dnl (DNL in the M4 File table notes)

VI Config.m4php_arg_enable (example, whether to ENABLE Laiwenhui support,[  --enable-laiwenhui           enable Laiwenhui Support] # Php_arg_with (testmodule, for Testmodule support,# Make sure that the comment is aligned:#--with-testmodule
  
   include Testmodule Support] # Here's with is a description, to enable this module, depending on some other modules, here we can temporarily ignore. # For example: module example, if dependent on APXS, you need: #/configure--WITH-APXS=/USR/LOCAL/APACHE/BIN/APXS  --enable-example
  

2. Declaring functions

Editing in a file Php_example.h file

VI php_example.h

We found Php_function (confirm_example_compiled); Add php_function (test) behind it;

3. Implement function test

VI example.c

Write the following code to the last side

/** * I added the first PHP extension * * */php_function (TEST) {    char *str = NULL;    char *arg = NULL;    int Arg_len;    int len;//    str = "Hello My first PHP extention! ^_^";

len = strlen (str);

Start to want to write this can have no effect, do not know why not. does not support strlen but can be compiled through.    if (Zend_parse_parameters (Zend_num_args () tsrmls_cc, "s", &arg, &arg_len) = = FAILURE) {        return;    }    len = spprintf (&str, 0, "Hello My first PHP extention! ^_^ param%s ", arg);    Return_stringl (str, len, 0);}

SPPRINTF should be a function of PHP.

Zend_parse_parameters is a function of PHP that gets the argument resolved if the failure is returned.

4. Tell the Zend engine what functions are in this example module.

Found: Zend_function_entry testmodule_functions[] This line, the comment means: all the available functions must be defined in this area.
Modified to:

* Every user visible function must has a entry in example_functions[]. */const zend_function_entry example_functions[] = {        Php_fe (confirm_example_compiled,        NULL)/           * for testing, remove later. *        /Php_fe (test,    null)/           * My extension Test */        {null,null, null}       

5. Compiling

Enter the example module

./configure? with-php-config=/usr/local/php/bin/php-config

/usr/local/php/bin/phpize

Make

CP modules/example.so/usr/local/php/lib/php/extensions/

Then modify the php.ini, let example.so enable, and finally restart the Web service

Four, test.

 
     
   
   
   
Here is a more clear explanation of the article of Bird brother.
   
Http://www.laruence.com/2009/04/28/719.html
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