跟廠長學PHP7內核(五):一步步分析生命周期之模塊初始化階段
上篇我們講到了模塊初始化階段,並得知它是由
php_module_startup
函數來實現的。該階段的主要作用是初始化變量、常量;註冊各種函數,比如工具、詞法、語法函數等;解析配置文件;加載擴展;當然最重要的是計算出PHP二進制程序的路徑,現在讓我們來研究一下該函數都做了哪些工作。
1、sapi_initialize_request_empty函數
// main/SAPI.c SAPI_API void sapi_initialize_empty_request(void) { SG(server_context) = NULL; SG(request_info).request_method = NULL; SG(request_info).auth_digest = SG(request_info).auth_user = SG(request_info).auth_password = NULL; SG(request_info).content_type_dup = NULL; }
這個函數主要為前面定義的SG宏中的成員變量進行初始化。
2、sapi_activate函數
// main/SAPI.c SAPI_API void sapi_activate(void) { zend_llist_init(&SG(sapi_headers).headers, sizeof(sapi_header_struct), (void (*)(void *)) sapi_free_header, 0); SG(sapi_headers).send_default_content_type = 1; /* SG(sapi_headers).http_response_code = 200; */ SG(sapi_headers).http_status_line = NULL; SG(sapi_headers).mimetype = NULL; SG(headers_sent) = 0; ZVAL_UNDEF(&SG(callback_func)); SG(read_post_bytes) = 0; SG(request_info).request_body = NULL; SG(request_info).current_user = NULL; SG(request_info).current_user_length = 0; SG(request_info).no_headers = 0; SG(request_info).post_entry = NULL; SG(request_info).proto_num = 1000; /* Default to HTTP 1.0 */ SG(global_request_time) = 0; SG(post_read) = 0; /* It's possible to override this general case in the activate() callback, if necessary. */ if (SG(request_info).request_method && !strcmp(SG(request_info).request_method, "HEAD")) { SG(request_info).headers_only = 1; } else { SG(request_info).headers_only = 0; } SG(rfc1867_uploaded_files) = NULL; /* Handle request method */ if (SG(server_context)) { if (PG(enable_post_data_reading) && SG(request_info).content_type && SG(request_info).request_method && !strcmp(SG(request_info).request_method, "POST")) { /* HTTP POST may contain form data to be processed into variables * depending on given content type */ sapi_read_post_data(); } else { SG(request_info).content_type_dup = NULL; } /* Cookies */ SG(request_info).cookie_data = sapi_module.read_cookies(); if (sapi_module.activate) { sapi_module.activate(); } } if (sapi_module.input_filter_init) { sapi_module.input_filter_init(); } }
函數的前半部分主要還是對SG宏的成員變量進行初始化。後半部分先是調用了sapi_module_struct
內部實現的activate
函數,又調用了input_filter_init
函數,但是在CLI模式並沒有實現這兩個函數,只是返回了NULL。代碼如下:
NULL, /* activate */
3、php_output_startup函數
//main/output.c PHPAPI void php_output_startup(void) { ZEND_INIT_MODULE_GLOBALS(output, php_output_init_globals, NULL); zend_hash_init(&php_output_handler_aliases, 8, NULL, NULL, 1); zend_hash_init(&php_output_handler_conflicts, 8, NULL, NULL, 1); zend_hash_init(&php_output_handler_reverse_conflicts, 8, NULL, reverse_conflict_dtor, 1); php_output_direct = php_output_stdout; }
我們先來看ZEND_INIT_MODULE_GLOBALS
宏做了什麽事情:
#define ZEND_INIT_MODULE_GLOBALS(module_name, globals_ctor, globals_dtor) globals_ctor(&module_name##_globals);
由代碼得知,該宏只是做了一層替換,替換後的內容為:
php_output_init_globals(&output_globals);
那php_output_init_globals
函數又做了什麽呢?
//main/output.c
static inline void php_output_init_globals(zend_output_globals *G)
{
ZEND_TSRMLS_CACHE_UPDATE();
memset(G, 0, sizeof(*G));
}
該函數通過memset
函數對output_globals
進行了內存相關的初始化,我們可以在main/php_output.h
中的155行找到它的宏定義OG。
//main/php_output.h
# define OG(v) (output_globals.v)
OG對應的結構體是php_output_init_globals
的入參zend_output_globals
,在這裏花了些時間,因為沒找到定義在哪裏,最後發現它也是通過宏定義替換得來的,代碼如下:
//main/php_output.h
ZEND_BEGIN_MODULE_GLOBALS(output)
zend_stack handlers;
php_output_handler *active;
php_output_handler *running;
const char *output_start_filename;
int output_start_lineno;
int flags;
ZEND_END_MODULE_GLOBALS(output)
看似是定義了一個結構體,但是代碼中又出現了兩個宏,我們再來瞅瞅這兩個宏是幹嘛的:
//Zend/zend_API.h
#define ZEND_BEGIN_MODULE_GLOBALS(module_name) typedef struct _zend_##module_name##_globals {
#define ZEND_END_MODULE_GLOBALS(module_name) } zend_##module_name##_globals;
原來只是做了個替換而已,替換後的代碼如下:
//這個是意淫出來的代碼
typedef struct _zend_output_globals {
zend_stack handlers;
php_output_handler *active;
php_output_handler *running;
const char *output_start_filename;
int output_start_lineno;
int flags;
} zend_output_globals
這才是zend_output_globals
最純粹的定義,寫的很是騷氣,差點看斷片。這樣看來我們的OG宏對應的就是這個結構體了,姑且認為它是PHP輸出相關的結構體。我們繼續往下看:
zend_hash_init(&php_output_handler_aliases, 8, NULL, NULL, 1);
zend_hash_init(&php_output_handler_conflicts, 8, NULL, NULL, 1);
zend_hash_init(&php_output_handler_reverse_conflicts, 8, NULL, reverse_conflict_dtor, 1);
php_output_direct = php_output_stdout;
接下來又對三個HashTable進行了初始化,初始化完成後,將php_output_direct
指針指向了php_output_stdout
函數。php_output_stdout
函數的作用是調用fwrite函數,輸出字符串到stdout中。代碼如下:
//main/output.c
static size_t php_output_stdout(const char *str, size_t str_len)
{
fwrite(str, 1, str_len, stdout);
return str_len;
}
4、php_startup_ticks函數
int php_startup_ticks(void)
{
zend_llist_init(&PG(tick_functions), sizeof(struct st_tick_function), NULL, 1);
return SUCCESS;
}
這裏又出現了一個PG宏,來看下它的定義
# define PG(v) (core_globals.v)
PG對應的結構體是core_globals
,core_globals
又對應_php_core_globals
,代碼如下
extern ZEND_API struct _php_core_globals core_globals;
php_core_globals顧名思義,就是php核心的全局變量,定義很多PHP相關的參數,比如內存上限、是否顯示錯誤信息、上傳文件大小限制、輸入輸出編碼、禁用的函數等等,這裏不再贅述,感興趣的同學可以去看一下源碼。
//main/php_globals.h
struct _php_core_globals {
zend_bool implicit_flush;
zend_long output_buffering;
zend_bool sql_safe_mode;
zend_bool enable_dl;
char *output_handler;
char *unserialize_callback_func;
zend_long serialize_precision;
zend_long memory_limit;
zend_long max_input_time;
zend_bool track_errors;
zend_bool display_errors;
zend_bool display_startup_errors;
zend_bool log_errors;
zend_long log_errors_max_len;
zend_bool ignore_repeated_errors;
zend_bool ignore_repeated_source;
zend_bool report_memleaks;
char *error_log;
char *doc_root;
char *user_dir;
char *include_path;
char *open_basedir;
char *extension_dir;
char *php_binary;
char *sys_temp_dir;
char *upload_tmp_dir;
zend_long upload_max_filesize;
char *error_append_string;
char *error_prepend_string;
char *auto_prepend_file;
char *auto_append_file;
char *input_encoding;
char *internal_encoding;
char *output_encoding;
arg_separators arg_separator;
char *variables_order;
HashTable rfc1867_protected_variables;
short connection_status;
short ignore_user_abort;
unsigned char header_is_being_sent;
zend_llist tick_functions;
zval http_globals[6];
zend_bool expose_php;
zend_bool register_argc_argv;
zend_bool auto_globals_jit;
char *docref_root;
char *docref_ext;
zend_bool html_errors;
zend_bool xmlrpc_errors;
zend_long xmlrpc_error_number;
zend_bool activated_auto_globals[8];
zend_bool modules_activated;
zend_bool file_uploads;
zend_bool during_request_startup;
zend_bool allow_url_fopen;
zend_bool enable_post_data_reading;
zend_bool report_zend_debug;
int last_error_type;
char *last_error_message;
char *last_error_file;
int last_error_lineno;
char *php_sys_temp_dir;
char *disable_functions;
char *disable_classes;
zend_bool allow_url_include;
zend_bool exit_on_timeout;
#ifdef PHP_WIN32
zend_bool com_initialized;
#endif
zend_long max_input_nesting_level;
zend_long max_input_vars;
zend_bool in_user_include;
char *user_ini_filename;
zend_long user_ini_cache_ttl;
char *request_order;
zend_bool mail_x_header;
char *mail_log;
zend_bool in_error_log;
#ifdef PHP_WIN32
zend_bool windows_show_crt_warning;
#endif
};
而php_startup_ticks
函數就是對PG宏的成員變量tick_functions
進行初始化。
5、gc_globals_ctor函數
ZEND_API void gc_globals_ctor(void)
{
gc_globals_ctor_ex(&gc_globals);
}
這裏又出現了一個gc_globals
,PHP的全局變量就是多啊,在這裏我們只要先記住它是PHP垃圾回收相關的結構體即可,後面我們做詳細介紹。這段代碼是對gc_globals
進行初始化。
//Zend/zend_gc.c
typedef struct _zend_gc_globals {
zend_bool gc_enabled;
zend_bool gc_active;
zend_bool gc_full;
gc_root_buffer *buf; /* preallocated arrays of buffers */
gc_root_buffer roots; /* list of possible roots of cycles */
gc_root_buffer *unused; /* list of unused buffers */
gc_root_buffer *first_unused; /* pointer to first unused buffer */
gc_root_buffer *last_unused; /* pointer to last unused buffer */
gc_root_buffer to_free; /* list to free */
gc_root_buffer *next_to_free;
uint32_t gc_runs;
uint32_t collected;
#if GC_BENCH
uint32_t root_buf_length;
uint32_t root_buf_peak;
uint32_t zval_possible_root;
uint32_t zval_buffered;
uint32_t zval_remove_from_buffer;
uint32_t zval_marked_grey;
#endif
} zend_gc_globals;
6、zend_startup函數
6.1、start_memory_manager
初始化內存管理器,對結構體alloc_globals
進行初始化。
//Zend/zend_alloc.c
static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
{
#if ZEND_MM_CUSTOM
char *tmp = getenv("USE_ZEND_ALLOC");
if (tmp && !zend_atoi(tmp, 0)) {
alloc_globals->mm_heap = malloc(sizeof(zend_mm_heap));
memset(alloc_globals->mm_heap, 0, sizeof(zend_mm_heap));
alloc_globals->mm_heap->use_custom_heap = ZEND_MM_CUSTOM_HEAP_STD;
alloc_globals->mm_heap->custom_heap.std._malloc = __zend_malloc;
alloc_globals->mm_heap->custom_heap.std._free = free;
alloc_globals->mm_heap->custom_heap.std._realloc = __zend_realloc;
return;
}
#endif
#ifdef MAP_HUGETLB
tmp = getenv("USE_ZEND_ALLOC_HUGE_PAGES");
if (tmp && zend_atoi(tmp, 0)) {
zend_mm_use_huge_pages = 1;
}
#endif
ZEND_TSRMLS_CACHE_UPDATE();
alloc_globals->mm_heap = zend_mm_init();
}
6.2、virtual_cwd_startup
virtual_cwd_startup
初始化了cwd_globals
,根據源碼可以看出成員變量都與realpath_cache
有關,realpath_cache
是什麽呢?我們平時在寫代碼的時候,經常會使用include、include_once、require、require_once等語句導入文件,如果每次使用這些語句都要去對應的目錄中尋找目標文件,勢必會降低性能,所以官方加入了緩存,以便PHP再次使用時不必到include_path中查找,加快PHP的執行速度。
//Zend/zend_virtual_cwd.c
typedef struct _virtual_cwd_globals {
cwd_state cwd;
zend_long realpath_cache_size;
zend_long realpath_cache_size_limit;
zend_long realpath_cache_ttl;
realpath_cache_bucket *realpath_cache[1024];
} virtual_cwd_globals;
6.3、zend_startup_extensions_mechanism
啟動擴展機制,初始化zend_extensions
結構體
int zend_startup_extensions_mechanism()
{
/* Startup extensions mechanism */
zend_llist_init(&zend_extensions, sizeof(zend_extension), (void (*)(void *)) zend_extension_dtor, 1);
last_resource_number = 0;
return SUCCESS;
}
6.4、提供編譯與執行入口
zend_compile_file = compile_file;
zend_execute_ex = execute_ex;
6.5、zend_init_opcodes_handlers
初始化Zend虛擬機的handler
6.6、初始化CG、EG
初始化CG(function_table)、CG(class_table)、CG(auto_globals)、EG(zend_constants),這裏不再贅述,我們後續講解。
GLOBAL_FUNCTION_TABLE = (HashTable *) malloc(sizeof(HashTable));
GLOBAL_CLASS_TABLE = (HashTable *) malloc(sizeof(HashTable));
GLOBAL_AUTO_GLOBALS_TABLE = (HashTable *) malloc(sizeof(HashTable));
GLOBAL_CONSTANTS_TABLE = (HashTable *) malloc(sizeof(HashTable));
6.7、ini_scanner_globals_ctor
初始化ini_scanner_globals
6.8、php_scanner_globals_ctor
初始化language_scanner_globals
6.9、zend_set_default_compile_time_values
設置了編譯相關的配置
//Zend/zend.c
static void zend_set_default_compile_time_values(void) /* {{{ */
{
/* default compile-time values */
CG(short_tags) = short_tags_default;
CG(compiler_options) = compiler_options_default;
}
6.10、EG(error_reporting) = E_ALL & ~E_NOTICE;
EG宏就是executor_globals
,Zend執行器相關的全局變量,在這裏對我們熟知的error_reporting
進行配置。
//Zend/zend_globals.h
struct _zend_executor_globals {
zval uninitialized_zval;
zval error_zval;
/* symbol table cache */
zend_array *symtable_cache[SYMTABLE_CACHE_SIZE];
zend_array **symtable_cache_limit;
zend_array **symtable_cache_ptr;
......
}
6.11、zend_interned_strings_init
初始化內部字符串
//Zend/zend_string.c
void zend_interned_strings_init(void)
{
#ifndef ZTS
zend_string *str;
zend_hash_init(&CG(interned_strings), 1024, NULL, _str_dtor, 1);
......
}
6.12、zend_startup_builtin_functions
初始化內部函數
//Zend/zend_builtin_functions.c
int zend_startup_builtin_functions(void) /* {{{ */
{
zend_builtin_module.module_number = 0;
zend_builtin_module.type = MODULE_PERSISTENT;
return (EG(current_module) = zend_register_module_ex(&zend_builtin_module)) == NULL ? FAILURE : SUCCESS;
}
6.13、zend_register_standard_constants
註冊常量,比如E_ERROR、E_WARNING、E_NOTICE、E_CORE_ERROR等。
//Zend/zend_constants.c
void zend_register_standard_constants(void)
{
REGISTER_MAIN_LONG_CONSTANT("E_ERROR", E_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_RECOVERABLE_ERROR", E_RECOVERABLE_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_WARNING", E_WARNING, CONST_PERSISTENT | CONST_CS);
......
}
6.14、zend_register_auto_global
將GLOBALS加入CG(auto_globals)
//Zend/zend.c
zend_register_auto_global(zend_string_init("GLOBALS", sizeof("GLOBALS") - 1, 1), 1, php_auto_globals_create_globals);
6.15、zend_init_rsrc_plist
初始化持久化符號表
int zend_init_rsrc_plist(void)
{
zend_hash_init_ex(&EG(persistent_list), 8, NULL, plist_entry_destructor, 1, 0);
return SUCCESS;
}
6.16、zend_init_exception_op
初始化EG(exception_op)
6.17、zend_init_call_trampoline_op
初始化EG(call_trampoline_op)
6.18、zend_ini_startup
初始化與php.ini解析相關的變量
//Zend/zend_ini.c
ZEND_API int zend_ini_startup(void) /* {{{ */
{
registered_zend_ini_directives = (HashTable *) malloc(sizeof(HashTable));
EG(ini_directives) = registered_zend_ini_directives;
EG(modified_ini_directives) = NULL;
EG(error_reporting_ini_entry) = NULL;
zend_hash_init_ex(registered_zend_ini_directives, 128, NULL, free_ini_entry, 1, 0);
return SUCCESS;
}
7、zend_register_list_destructors_ex函數
初始化析構函數
//Zend/zend_list.c
ZEND_API int zend_register_list_destructors_ex(rsrc_dtor_func_t ld, rsrc_dtor_func_t pld, const char *type_name, int module_number)
{
zend_rsrc_list_dtors_entry *lde;
zval zv;
lde = malloc(sizeof(zend_rsrc_list_dtors_entry));
lde->list_dtor_ex = ld;
lde->plist_dtor_ex = pld;
lde->module_number = module_number;
lde->resource_id = list_destructors.nNextFreeElement;
lde->type_name = type_name;
ZVAL_PTR(&zv, lde);
if (zend_hash_next_index_insert(&list_destructors, &zv) == NULL) {
return FAILURE;
}
return list_destructors.nNextFreeElement-1;
}
8、php_binary_init函數
獲取PHP執行的二進制路徑
static void php_binary_init(void)
{
char *binary_location;
#ifdef PHP_WIN32
binary_location = (char *)malloc(MAXPATHLEN);
if (GetModuleFileName(0, binary_location, MAXPATHLEN) == 0) {
free(binary_location);
PG(php_binary) = NULL;
}
#else
if (sapi_module.executable_location) {
binary_location = (char *)malloc(MAXPATHLEN);
if (!strchr(sapi_module.executable_location, '/')) {
char *envpath, *path;
int found = 0;
......
}
9、php_output_register_constants函數
初始化輸出相關的預定義常量
//main/output.c
PHPAPI void php_output_register_constants(void)
{
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_START", PHP_OUTPUT_HANDLER_START, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_WRITE", PHP_OUTPUT_HANDLER_WRITE, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FLUSH", PHP_OUTPUT_HANDLER_FLUSH, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CLEAN", PHP_OUTPUT_HANDLER_CLEAN, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FINAL", PHP_OUTPUT_HANDLER_FINAL, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CONT", PHP_OUTPUT_HANDLER_WRITE, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_END", PHP_OUTPUT_HANDLER_FINAL, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CLEANABLE", PHP_OUTPUT_HANDLER_CLEANABLE, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FLUSHABLE", PHP_OUTPUT_HANDLER_FLUSHABLE, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_REMOVABLE", PHP_OUTPUT_HANDLER_REMOVABLE, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_STDFLAGS", PHP_OUTPUT_HANDLER_STDFLAGS, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_STARTED", PHP_OUTPUT_HANDLER_STARTED, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_DISABLED", PHP_OUTPUT_HANDLER_DISABLED, CONST_CS | CONST_PERSISTENT);
}
10、php_rfc1867_register_constants函數
註冊文件上傳相關的預定義常量
//main/rfc1867.c
void php_rfc1867_register_constants(void) /* {{{ */
{
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_OK", UPLOAD_ERROR_OK, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_INI_SIZE", UPLOAD_ERROR_A, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_FORM_SIZE", UPLOAD_ERROR_B, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_PARTIAL", UPLOAD_ERROR_C, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_FILE", UPLOAD_ERROR_D, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_NO_TMP_DIR", UPLOAD_ERROR_E, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_CANT_WRITE", UPLOAD_ERROR_F, CONST_CS | CONST_PERSISTENT);
REGISTER_MAIN_LONG_CONSTANT("UPLOAD_ERR_EXTENSION", UPLOAD_ERROR_X, CONST_CS | CONST_PERSISTENT);
}
11、php_init_config函數
初始化配置文件php.ini,並通過zend_parse_ini_file
解析。
12、zend_register_standard_ini_entries函數
初始化ini相關的變量
void zend_register_standard_ini_entries(void) /* {{{ */
{
int module_number = 0;
REGISTER_INI_ENTRIES();
}
13、php_startup_auto_globals函數
註冊我們熟知的全局變量$_GET、$_POST、$_COOKIE等等
//main/php_variables.c
void php_startup_auto_globals(void)
{
zend_register_auto_global(zend_string_init("_GET", sizeof("_GET")-1, 1), 0, php_auto_globals_create_get);
zend_register_auto_global(zend_string_init("_POST", sizeof("_POST")-1, 1), 0, php_auto_globals_create_post);
zend_register_auto_global(zend_string_init("_COOKIE", sizeof("_COOKIE")-1, 1), 0, php_auto_globals_create_cookie);
zend_register_auto_global(zend_string_init("_SERVER", sizeof("_SERVER")-1, 1), PG(auto_globals_jit), php_auto_globals_create_server);
zend_register_auto_global(zend_string_init("_ENV", sizeof("_ENV")-1, 1), PG(auto_globals_jit), php_auto_globals_create_env);
zend_register_auto_global(zend_string_init("_REQUEST", sizeof("_REQUEST")-1, 1), PG(auto_globals_jit), php_auto_globals_create_request);
zend_register_auto_global(zend_string_init("_FILES", sizeof("_FILES")-1, 1), 0, php_auto_globals_create_files);
}
14、php_startup_sapi_content_types函數
初始化針對不同內容類型的處理函數
//main/php_content_types.c
int php_startup_sapi_content_types(void)
{
sapi_register_default_post_reader(php_default_post_reader);
sapi_register_treat_data(php_default_treat_data);
sapi_register_input_filter(php_default_input_filter, NULL);
return SUCCESS;
}
15、php_register_internal_extensions_func函數
註冊內部擴展函數
16、php_register_extensions_bc函數
註冊PHP的附加擴展
17、zend_startup_modules函數
啟動Zend模塊
18、zend_startup_extensions函數
啟動Zend擴展
19、php_disable_functions函數
對PHP的禁用函數進行設置
static void php_disable_functions(void)
{
char *s = NULL, *e;
if (!*(INI_STR("disable_functions"))) {
return;
}
e = PG(disable_functions) = strdup(INI_STR("disable_functions"));
if (e == NULL) {
return;
}
while (*e) {
switch (*e) {
case ' ':
case ',':
if (s) {
*e = '\0';
zend_disable_function(s, e-s);
s = NULL;
}
break;
default:
if (!s) {
s = e;
}
break;
}
e++;
}
if (s) {
zend_disable_function(s, e-s);
}
}
20、php_disable_classes函數
對PHP的禁用類進行設置
static void php_disable_classes(void)
{
char *s = NULL, *e;
if (!*(INI_STR("disable_classes"))) {
return;
}
e = PG(disable_classes) = strdup(INI_STR("disable_classes"));
while (*e) {
switch (*e) {
case ' ':
case ',':
if (s) {
*e = '\0';
zend_disable_class(s, e-s);
s = NULL;
}
break;
default:
if (!s) {
s = e;
}
break;
}
e++;
}
if (s) {
zend_disable_class(s, e-s);
}
}
跟廠長學PHP7內核(五):一步步分析生命周期之模塊初始化階段