c編寫php

1. 如何用c語言在windows平台上開發php extension

如何使用C語言開發PHP擴展。

函數功能：php裡面的整數是有符號數，其內部實現其實就是long，不是unsigned long。對於32位機器來說，php最大能表示的整數就是2^31-1了，一般在應用中碰到大於2^31-1而小於2^32的數就只能用字元串來表示了。對於mixed int_ext(string in)來說，如果字元串in表示的整數小於2^31-1，那麼就返回整數，如果大於就返回字元串。

開發擴展步驟如下：（首先需要下載php的源碼，這里下載的是php-5.3.14）

1，建立擴展骨架

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01.cd php-5.3.14/ext
02../ext_skel --extname=int_ext
cd php-5.3.14/ext
./ext_skel --extname=int_ext
2，修改編譯參數

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01.cd php-5.3.14/ext/int_ext
02.vi config.m4
cd php-5.3.14/ext/int_ext
vi config.m4去掉 PHP_ARG_ENABLE(int_ext, whether to enable int_ext support 和
[ --enable-int_ext Enable int_ext support]) 兩行前面的dnl 修改後為：

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01.1. dnl Otherwise use enable:
02.2. PHP_ARG_ENABLE(int_ext, whether to enable int_ext support,
03.3. dnl Make sure that the comment is aligned:
04.4. [ --enable-int_ext Enable int_ext support])
1. dnl Otherwise use enable:
2. PHP_ARG_ENABLE(int_ext, whether to enable int_ext support,
3. dnl Make sure that the comment is aligned:
4. [ --enable-int_ext Enable int_ext support])
3，編寫C代碼

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01.cd php-5.3.14/ext/int_ext
02.vi php_int_ext.h
03.#在 PHP_FUNCTION(confirm_int_ext_compiled); 後面新增一行 PHP_FUNCTION(int_ext);
cd php-5.3.14/ext/int_ext
vi php_int_ext.h
#在 PHP_FUNCTION(confirm_int_ext_compiled); 後面新增一行 PHP_FUNCTION(int_ext);[plain] view plainprint?
01.cd php-5.3.14/ext/int_ext
02.vi int_ext.c
03.#在PHP_FE(confirm_int_ext_compiled, NULL) 後面添加 PHP_FE(int_ext, NULL)添加後為：
04.1. zend_function_entry int_ext_functions[] = {
05.2. PHP_FE(confirm_int_ext_compiled, NULL) /* For testing, remove later. */
06.3. PHP_FE(int_ext, NULL) /* For testing, remove later. */
07.4. {NULL, NULL, NULL} /* Must be the last line in int_ext_functions[] */
08.5. };
cd php-5.3.14/ext/int_ext
vi int_ext.c
#在PHP_FE(confirm_int_ext_compiled, NULL) 後面添加 PHP_FE(int_ext, NULL)添加後為：
1. zend_function_entry int_ext_functions[] = {
2. PHP_FE(confirm_int_ext_compiled, NULL) /* For testing, remove later. */
3. PHP_FE(int_ext, NULL) /* For testing, remove later. */
4. {NULL, NULL, NULL} /* Must be the last line in int_ext_functions[] */
5. };
核心代碼：

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01.PHP_FUNCTION(int_ext)
02.{
03. char * str = NULL;
04. int str_len;
05. int argc = ZEND_NUM_ARGS();
06. if(zend_parse_parameters(argc TSRMLS_CC,"s",&str,&str_len) == FAILURE)
07. return ;
08. char * result;
09. int result_length = str_len;
10. result = (char *) emalloc(result_length + 1);
11. memcpy(result,str,result_length);
12. unsigned long result_num = strtoul(result, NULL, 10);
13. int sizeoflong sizeof(long);
14. unsigned long max_long = 1 << (sizeoflong * 8 -1);
15. if(result_num < max_long)
16. {
17. RETURN_LONG(result_num);
18. }
19. else
20. {
21. RESULT_STRINGL(result, result_length, 0);
22. }
23.}
PHP_FUNCTION(int_ext)
{
char * str = NULL;
int str_len;
int argc = ZEND_NUM_ARGS();
if(zend_parse_parameters(argc TSRMLS_CC,"s",&str,&str_len) == FAILURE)
return ;
char * result;
int result_length = str_len;
result = (char *) emalloc(result_length + 1);
memcpy(result,str,result_length);
unsigned long result_num = strtoul(result, NULL, 10);
int sizeoflong sizeof(long);
unsigned long max_long = 1 << (sizeoflong * 8 -1);
if(result_num < max_long)
{
RETURN_LONG(result_num);
}
else
{
RESULT_STRINGL(result, result_length, 0);
}
}

4，編譯

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01.cd php-5.3.14/ext/int_ext
02./usr/local/php/bin/pphpize
03../configure --with-php-config=/usr/local/php/bin/php-config
04.make
05.make install
cd php-5.3.14/ext/int_ext
/usr/local/php/bin/pphpize
./configure --with-php-config=/usr/local/php/bin/php-config
make
make install
此時會產生一個so文件： /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/int_ext.so
修改php.ini 添加擴展extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/"

[int_ext]

extension = int_ext.so

5，測試

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01.$a = int_ext("12345678900");
02.var_mp($a);
03.$a = int_ext("123456789");
04.var_mp($a);
$a = int_ext("12345678900");
var_mp($a);
$a = int_ext("123456789");
var_mp($a);
結果輸出:

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01.string(11) "12345678900"
02.int(123456789)

2. 如何用c語言在windows平台上開發php extension

何使用C語言發PHP擴展

函數功能：php面整數符號數其內部實現其實longunsigned long於32位機器說php能表示整數2^31-1般應用碰於2^31-1於2^32數能用字元串表示於mixed int_ext(string in)說字元串in表示整數於2^31-1返整數於返字元串

發擴展步驟：（首先需要載php源碼載php-5.3.14）

1建立擴展骨架

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01.cd php-5.3.14/ext
02../ext_skel --extname=int_ext
cd php-5.3.14/ext
./ext_skel --extname=int_ext
2修改編譯參數

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01.cd php-5.3.14/ext/int_ext
02.vi config.m4
cd php-5.3.14/ext/int_ext
vi config.m4掉 PHP_ARG_ENABLE(int_ext, whether to enable int_ext support
[ --enable-int_ext Enable int_ext support]) 兩行前面dnl 修改：

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01.1. dnl Otherwise use enable:
02.2. PHP_ARG_ENABLE(int_ext, whether to enable int_ext support,
03.3. dnl Make sure that the comment is aligned:
04.4. [ --enable-int_ext Enable int_ext support])
1. dnl Otherwise use enable:
2. PHP_ARG_ENABLE(int_ext, whether to enable int_ext support,
3. dnl Make sure that the comment is aligned:
4. [ --enable-int_ext Enable int_ext support])
3編寫C代碼

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01.cd php-5.3.14/ext/int_ext
02.vi php_int_ext.h
03.# PHP_FUNCTION(confirm_int_ext_compiled); 面新增行 PHP_FUNCTION(int_ext);
cd php-5.3.14/ext/int_ext
vi php_int_ext.h
# PHP_FUNCTION(confirm_int_ext_compiled); 面新增行 PHP_FUNCTION(int_ext);[plain] view plainprint?
01.cd php-5.3.14/ext/int_ext
02.vi int_ext.c
03.#PHP_FE(confirm_int_ext_compiled, NULL) 面添加 PHP_FE(int_ext, NULL)添加：
04.1. zend_function_entry int_ext_functions[] = {
05.2. PHP_FE(confirm_int_ext_compiled, NULL) /* For testing, remove later. */
06.3. PHP_FE(int_ext, NULL) /* For testing, remove later. */
07.4. {NULL, NULL, NULL} /* Must be the last line in int_ext_functions[] */
08.5. };
cd php-5.3.14/ext/int_ext
vi int_ext.c
#PHP_FE(confirm_int_ext_compiled, NULL) 面添加 PHP_FE(int_ext, NULL)添加：
1. zend_function_entry int_ext_functions[] = {
2. PHP_FE(confirm_int_ext_compiled, NULL) /* For testing, remove later. */
3. PHP_FE(int_ext, NULL) /* For testing, remove later. */
4. {NULL, NULL, NULL} /* Must be the last line in int_ext_functions[] */
5. };
核代碼：

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01.PHP_FUNCTION(int_ext)
02.{
03. char * str = NULL;
04. int str_len;
05. int argc = ZEND_NUM_ARGS();
06. if(zend_parse_parameters(argc TSRMLS_CC,"s",&str,&str_len) == FAILURE)
07. return ;
08. char * result;
09. int result_length = str_len;
10. result = (char *) emalloc(result_length + 1);
11. memcpy(result,str,result_length);
12. unsigned long result_num = strtoul(result, NULL, 10);
13. int sizeoflong sizeof(long);
14. unsigned long max_long = 1 << (sizeoflong * 8 -1);
15. if(result_num < max_long)
16. {
17. RETURN_LONG(result_num);
18. }
19. else
20. {
21. RESULT_STRINGL(result, result_length, 0);
22. }
23.}
PHP_FUNCTION(int_ext)
{
char * str = NULL;
int str_len;
int argc = ZEND_NUM_ARGS();
if(zend_parse_parameters(argc TSRMLS_CC,"s",&str,&str_len) == FAILURE)
return ;
char * result;
int result_length = str_len;
result = (char *) emalloc(result_length + 1);
memcpy(result,str,result_length);
unsigned long result_num = strtoul(result, NULL, 10);
int sizeoflong sizeof(long);
unsigned long max_long = 1 << (sizeoflong * 8 -1);
if(result_num < max_long)
{
RETURN_LONG(result_num);
}
else
{
RESULT_STRINGL(result, result_length, 0);
}
}

4編譯

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01.cd php-5.3.14/ext/int_ext
02./usr/local/php/bin/pphpize
03../configure --with-php-config=/usr/local/php/bin/php-config
04.make
05.make install
cd php-5.3.14/ext/int_ext
/usr/local/php/bin/pphpize
./configure --with-php-config=/usr/local/php/bin/php-config
make
make install
產so文件： /usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/int_ext.so
修改php.ini 添加擴展extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20060613/"

[int_ext]

extension = int_ext.so

5測試

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01.$a = int_ext("12345678900");
02.var_mp($a);
03.$a = int_ext("123456789");
04.var_mp($a);
$a = int_ext("12345678900");
var_mp($a);
$a = int_ext("123456789");
var_mp($a);
結輸:

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01.string(11) "12345678900"
02.int(123456789)