php-5.6.26源代码 - PHP文件汇编成opcode、执行

 

文件 php-5.6.26/Zend/zend.c

ZEND_API int zend_execute_scripts(int type TSRMLS_DC, zval **retval, int file_count, ...) /* {{{ */
{va_list files;int i;zend_file_handle *file_handle;zend_op_array *orig_op_array = EG(active_op_array); // 保存现场，操作码数组 zval **orig_retval_ptr_ptr = EG(return_value_ptr_ptr); // 返回值“指针”long orig_interactive = CG(interactive);va_start(files, file_count);for (i = 0; i < file_count; i++) { // file_handle = va_arg(files, zend_file_handle *); // 获取文件名（前置文件、主文件、后置文件）if (!file_handle) {continue;}if (orig_interactive) {if (file_handle->filename[0] != '-' || file_handle->filename[1]) {CG(interactive) = 0;} else {CG(interactive) = 1;}}EG(active_op_array) = zend_compile_file(file_handle, type TSRMLS_CC); // 编译PHP文件成操作码 op_code  ， zend_compile_file == compile_fileif (file_handle->opened_path) {int dummy = 1;zend_hash_add(&EG(included_files), file_handle->opened_path, strlen(file_handle->opened_path) + 1, (void *)&dummy, sizeof(int), NULL); // included 的文件列表
        }zend_destroy_file_handle(file_handle TSRMLS_CC);  // 销毁文件句柄if (EG(active_op_array)) { // “操作码”数组EG(return_value_ptr_ptr) = retval ? retval : NULL;zend_execute(EG(active_op_array) TSRMLS_CC);  // 执行编译后的操作码 op_code  ， zend_execute ==  execute_exzend_exception_restore(TSRMLS_C); // 还原异常if (EG(exception)) { // 检查异常if (EG(user_exception_handler)) { // 用户的异常处理器zval *orig_user_exception_handler;zval **params[1], *retval2, *old_exception;old_exception = EG(exception);EG(exception) = NULL;params[0] = &old_exception;orig_user_exception_handler = EG(user_exception_handler);if (call_user_function_ex(CG(function_table), NULL, orig_user_exception_handler, &retval2, 1, params, 1, NULL TSRMLS_CC) == SUCCESS) { // 调用用户的异常处理器if (retval2 != NULL) {zval_ptr_dtor(&retval2);}if (EG(exception)) {zval_ptr_dtor(&EG(exception));EG(exception) = NULL;}zval_ptr_dtor(&old_exception);} else {EG(exception) = old_exception;zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);}} else {zend_exception_error(EG(exception), E_ERROR TSRMLS_CC);}}destroy_op_array(EG(active_op_array) TSRMLS_CC); // 迭代执行所有 zend_extensions 扩展的 zend_extension_op_array_dtor_handler 函数 
            efree(EG(active_op_array));} else if (type==ZEND_REQUIRE) {va_end(files);EG(active_op_array) = orig_op_array;EG(return_value_ptr_ptr) = orig_retval_ptr_ptr;CG(interactive) = orig_interactive;return FAILURE;}}va_end(files);EG(active_op_array) = orig_op_array; // 还原现场EG(return_value_ptr_ptr) = orig_retval_ptr_ptr;CG(interactive) = orig_interactive;return SUCCESS;
}
/* }}} */