线程安全宏定义
TSRM/TSRM.h文件中有如下定义 #define TSRMLS_FETCH() void ***tsrm_ls = (void ***) ts_resource_ex(0, NULL) #define TSRMLS_D void ***tsrm_ls #define TSRMLS_DC , TSRMLS_D #define TSRMLS_C tsrm_ls #define TSRMLS_CC , TSRMLS_C
SG -> SAPI Global SAPI信息(main/SAPI.h) EG -> Executor Global 执行时信息(zend/zend_globals_macros.h:43) PG -> PHP Core Global 主要存储php.ini中的信息 PHP全局变量。php.ini映射一个或者多个PHP全局结构。(main/php_globals.h) FG -> File Global 文件全局变量。大多数文件I/O或相关的全局变量的数据流都塞进标准扩展出口结构。(ext/standard/file.h) CG -> Complier Global 编译时信息,包括函数表等(zend_globals_macros.h:32) 用来访问核心全局变量。(zend/zend_globals_macros.h)
getcwd() VCWD_GETCWD() fopen() VCWD_FOPEN open() VCWD_OPEN() //用于两个参数的版本 open() VCWD_OPEN_MODE() //用于三个参数的open()版本 creat() VCWD_CREAT() chdir() VCWD_CHDIR() getwd() VCWD_GETWD() realpath() VCWD_REALPATH() rename() VCWD_RENAME() stat() VCWD_STAT() lstat() VCWD_LSTAT() unlink() VCWD_UNLINK() mkdir() VCWD_MKDIR() rmdir() VCWD_RMDIR() opendir() VCWD_OPENDIR() popen() VCWD_POPEN() access() VCWD_ACCESS() utime() VCWD_UTIME() chmod() VCWD_CHMOD() chown() VCWD_CHOWN()
#php-fpm 生成 POST|GET|COOKIE|SERVER|ENV|REQUEST|FILES全局变量的流程 php_cgi_startup() -> php_module_startup() -> php_startup_auto_globals() -> 保存变量到symbol_table符号表 php_cgi_startup()在 fpm/fpm/fpm_main.c中定义 php_module_startup() 在main/main.c中定义 php_startup_auto_globals() 在main/php_variables.h中定义 zend_hash_update(&EG(symbol_table), "_GET", sizeof("_GET") + 1, &vars, sizeof(zval *), NULL); /* 读取$_SERVER变量 */ static PHP_FUNCTION(print_server_vars) { zval **val; if (zend_hash_find(&EG(symbol_table), "_SERVER", sizeof("_SERVER"), (void **)&val) == SUCCESS) { RETURN_ZVAL(*val, 1, 0); }else{ RETURN_FALSE; } } /* 读取$_SERVER[$name] */ ZEND_BEGIN_ARG_INFO(print_server_var_arginfo, 0) ZEND_ARG_INFO(0, "name") ZEND_END_ARG_INFO() static PHP_FUNCTION(print_server_var) { char *name; int name_len; zval **val; HashTable *ht_vars = NULL; HashPosition pos; zval **ret_val; if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!", &name, &name_len) == FAILURE) { RETURN_NULL(); } if (zend_hash_find(&EG(symbol_table), "_SERVER", sizeof("_SERVER"), (void **)&val) == SUCCESS) { ht_vars = Z_ARRVAL_PP(val); //此处需传入大于name长度+1的值,因为字符串值后面需要'\0' if (zend_hash_find(ht_vars, name, name_len+1, (void **)&ret_val) == SUCCESS) { RETURN_STRING(Z_STRVAL_PP(ret_val), 0); }else{ RETURN_NULL(); } }else{ RETURN_NULL(); } }
SEARCH_PATH="/usr/local /usr" #lib搜索的目录 SEARCH_FOR="/include/curl/curl.h" #lib头文件的路径 if test -r $PHP_LIBS/$SEARCH_FOR; then LIBS_DIR=$PHP_LIBS else # search default path list AC_MSG_CHECKING([for libs files in default path]) for i in $SEARCH_PATH ; do if test -r $i/$SEARCH_FOR; then LIBS_DIR=$i #搜索到的lib的路径 AC_MSG_RESULT(found in $i) fi done fi /*验证lib是否存在*/ if test -z "$LIBS_DIR"; then AC_MSG_RESULT([not found]) AC_MSG_ERROR([Please reinstall the libs distribution]) fi /*编译的时候添加lib的include目录, -I/usr/include*/ PHP_ADD_INCLUDE($LIBS_DIR/include) LIBNAME=curl #lib名称 LIBSYMBOL=curl_version #lib的一个函数,用来PHP_CHECK_LIBRARY验证lib /*验证lib*/ PHP_CHECK_LIBRARY($LIBNAME,$LIBSYMBOL, [ PHP_ADD_LIBRARY_WITH_PATH($LIBNAME, $LIBS_DIR/$PHP_LIBDIR, LIBS_SHARED_LIBADD) #编译的时候链接lib, -llibcurl AC_DEFINE(HAVE_LIBSLIB,1,[ ]) ],[ AC_MSG_ERROR([wrong libs lib version or lib not found]) ],[ -L$LIBS_DIR/$PHP_LIBDIR -lm ]) PHP_SUBST(LIBS_SHARED_LIBADD)
function hello_array_strings($arr) { if (!is_array($arr)) return NULL; printf("The array passed contains %d elements ", count($arr)); foreach($arr as $data) { if (is_string($data)) echo "$data "; } }
PHP_FUNCTION(hello_array_strings) { zval *arr, **data; HashTable *arr_hash; HashPosition pointer; int array_count; if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "a", &arr) == FAILURE) { RETURN_NULL(); } arr_hash = Z_ARRVAL_P(arr); array_count = zend_hash_num_elements(arr_hash); php_printf("The array passed contains %d elements ", array_count); for(zend_hash_internal_pointer_reset_ex(arr_hash, &pointer); zend_hash_get_current_data_ex(arr_hash, (void**) &data, &pointer) == SUCCESS; zend_hash_move_forward_ex(arr_hash, &pointer)) { if (Z_TYPE_PP(data) == IS_STRING) { PHPWRITE(Z_STRVAL_PP(data), Z_STRLEN_PP(data)); php_printf(" "); } } RETURN_TRUE; }
int php_printf(const char *format, ...); int php_write(void *buf, uint size TSRMLS_DC); int PHPWRITE(void *buf, uint size); void php_html_puts(const char *buf, uint size TSRMLS_DC) //print zval ZEND_API int zend_print_zval(zval *expr, int indent); ZEND_API void zend_print_zval_r(zval *expr, int indent TSRMLS_DC); //sprintf PHPAPI int spprintf( char **pbuf, size_t max_len, const char *format, ...); PHPAPI int vspprintf(char **pbuf, size_t max_len, const char *format, va_list ap); //string strcat ZEND_API int add_char_to_string(zval *result, const zval *op1, const zval *op2); ZEND_API int add_string_to_string(zval *result, const zval *op1, const zval *op2); ZEND_API int concat_function(zval *result, zval *op1, zval *op2 TSRMLS_DC); ZEND_API void zend_str_tolower(char *str, unsigned int length); ZEND_API char *zend_str_tolower_copy(char *dest, const char *source, unsigned int length); ZEND_API char *zend_str_tolower_dup(const char *source, unsigned int length);
emalloc(size_t size); efree(void *ptr); ecalloc(size_t nmemb, size_t size); erealloc(void *ptr, size_t size); estrdup(const char *s); estrndup(const char *s, unsigned int length);
以上就介绍了PHP扩展小结,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。