PHP内核两大流程之启动PHP的核心代码段

发布时间:2017-09-03 13:24:16
PHP内核两大流程之启动PHP的核心代码段


Step 1: Start the sapi

extern zend_module_entry php_apache_module;

static int php_apache2_startup(sapi_module_struct *sapi_module)
{
if (php_module_startup(sapi_module, &php_apache_module, 1)==FAILURE) {
return FAILURE;
}
return SUCCESS;
}

Step 2: Start the php

int php_module_startup(sapi_module_struct *sf, zend_module_entry *additional_modules, uint num_additional_modules)
{
zend_utility_functions zuf;
zend_utility_values zuv;

.....

sapi_module = *sf;

php_output_startup();
zuf.error_function = php_error_cb;
zuf.printf_function = php_printf;
zuf.write_function = php_output_wrapper;
zuf.fopen_function = php_fopen_wrapper_for_zend;
zuf.message_handler = php_message_handler_for_zend;
zuf.block_interruptions = sapi_module.block_interruptions;
zuf.unblock_interruptions = sapi_module.unblock_interruptions;
zuf.get_configuration_directive = php_get_configuration_directive_for_zend;
zuf.ticks_function = php_run_ticks;
zuf.on_timeout = php_on_timeout;
zuf.stream_open_function = php_stream_open_for_zend;
zuf.vspprintf_function = vspprintf;
zuf.getenv_function = sapi_getenv;
zuf.resolve_path_function = php_resolve_path_for_zend;
zend_startup(&zuf, NULL TSRMLS_CC);

......

gc_globals_ctor(TSRMLS_C);

......
/* Register PHP core ini entries */
REGISTER_INI_ENTRIES();
/* Register Zend ini entries */
zend_register_standard_ini_entries(TSRMLS_C);
/* Disable realpath cache if an open_basedir is set */
if (PG(open_basedir) && *PG(open_basedir)) {
CWDG(realpath_cache_size_limit) = 0;
}
/* initialize stream wrappers registry
* (this uses configuration parameters from php.ini)
*/
if (php_init_stream_wrappers(module_number TSRMLS_CC) == FAILURE)
{
php_printf("PHP: Unable to initialize stream url wrappers.\n");
return FAILURE;
}
/* startup extensions staticly compiled in */
if (php_register_internal_extensions_func(TSRMLS_C) == FAILURE) {
php_printf("Unable to start builtin modules\n");
return FAILURE;
}
/* start additional PHP extensions */
php_register_extensions_bc(additional_modules, num_additional_modules TSRMLS_CC);
/* load and startup extensions compiled as shared objects (aka DLLs)
as requested by php.ini entries
theese are loaded after initialization of internal extensions
as extensions *might* rely on things from ext/standard
which is always an internal extension and to be initialized
ahead of all other internals
*/
php_ini_register_extensions(TSRMLS_C);
zend_startup_modules(TSRMLS_C);
/* start Zend extensions */
zend_startup_extensions();

.....
}

int zend_startup
(zend_utility_functions *utility_functions, char **extensions TSRMLS_DC) /* {{{ */
{
zend_compiler_globals *compiler_globals;
zend_executor_globals *executor_globals;

......
zend_compile_file = compile_file;
zend_execute_ex = execute_ex;
zend_execute_internal = NULL;
zend_init_opcodes_handlers();

......
}


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