![Edit C source file
- pre declare
const zend_function_entry simhash_functions[] = {
PHP_FE(confirm_hello_compiled, NULL) /* For testing,
remove later. */
PHP_FE(hello, NULL)
{NULL, NULL, NULL} /* Must be the last line in
hello_functions[] */
};](https://image.slidesharecdn.com/07-buildyourownphpextension-101218211737-phpapp01-120829205817-phpapp01/85/build-your-own-php-extension-16-320.jpg)
build your own php extension
- 1. Trường đào tạo Lập trình viên Quốc tế AiTi-Aptech Build your own PHP Extension Hanoi PHP Day 2010 Bui Dinh Ngoc AiTi-Aptech - CAH
- 3. PHP Extension • You've used extensions ? • php_mysql , gd , pdo , curl , ... •
- 4. PHP Extension (Zend Engine) • PHP language written in C • PHP interpreter written in C too • And PHP Extension must written in C • Another PHP implement may be using diffrence language
- 5. Why and When need PHP extension ? 1. Buildin PHP function are not enough 2. Existing PHP extension are not enough 3. Pure PHP function are more slow 4. Have C lib can do this for you
- 6. Prepare 1. Ubuntu Linux 2. GNU C Compiler , build , make utils 3. PHP 5 Dev package : sudo apt-get install php5-dev 4. PHP source code o sudo svn checkout http://svn.php.net/viewvc/php/php- src/trunk o
- 9. Write Hello World Extension //Example function call <?php function hello_world() { return 'Hello World'; } ?>
- 10. 1. Run ext_skel script : sudo ./ext_skel –extname=hello 2.
- 11. Result
- 12. phpize The phpize command is used to prepare the build environment for a PHP extension.
- 14. Edit header file php_hello.h
- 15. Insert your function to header file PHP_FUNCTION(hello); /*My function here*/
- 16. Edit C source file - pre declare const zend_function_entry simhash_functions[] = { PHP_FE(confirm_hello_compiled, NULL) /* For testing, remove later. */ PHP_FE(hello, NULL) {NULL, NULL, NULL} /* Must be the last line in hello_functions[] */ };
- 18. Build - Run some script 1. sudo ./configure 2. sudo make 3. ls modules -> hello.so
- 19. Test 1. Deploy file hello.so 2. Check new extension is loaded by phpinfo function 3. You also can test using existed hello.php script in ext dir
- 20. Advance ! 1. Build php function with parameter 2. Return value 3. Memory allocation 4. Anti Memory leak 5. Array 6. String 7. Global variable 8. PHP.INI variable 9. ........
- 21. Function with parameter function hello_add($a, $b) { $sum = (int)$a + (float)$b; return $sum; }
- 22. Function with parameter PHP_FUNCTION(hello_add) { long a; double b; if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ld", &a, &b) == FAILURE) { RETURN_NULL(); } RETURN_DOUBLE(a + b); }
- 23. Return value 1. bool 2. int 3. double Only 6 return type 4. resource 5. array 6. object
- 24. Return value (macro) RETURN_LONG() for integer values RETURN_DOUBLE() for floating point values RETURN_BOOL() for true/false values RETURN_NULL() for null value .....
- 26. Anti Memory leak • In C, memory management always very hard . • Wrapper functions provides you with a safety net and some helpful debugging facilities • But convert existing C source can't use wrapper functions
- 27. Reference 1. http://i-php.net/2010/10/t-build-extension-cho-php/ 2. http://devzone.zend.com/article/1021 3. "Programming PHP" by Rasmus Lerdorf and Kevin