#49636 [Opn]: PHP_INT_SIZE inconsistent with pack("i")

ID: 49636 User updated by: hsu at jean-david dot com Reported By: hsu at jean-david dot com Status: Open Bug Type: Math related Operating System: linux PHP Version: 5.2.11 New Comment: There is no easy way to pack a plain old php integer This means that pack has many different format codes but none for a php int? Previous Comments: ------------------------------------------------------------------------ [2009-09-23 07:28:36] sjoerd@php.net Thank you for your bug report. The integer in the pack documentation and the integer in the PHP integer documentation refer to different things. The pack integer is a C-style int. The PHP integer is implemented in a long. These do not need to be the same size. ------------------------------------------------------------------------ [2009-09-23 01:54:13] hsu at jean-david dot com Description: ------------ PHP pack documentation: i signed integer (machine dependent size and byte order) PHP integer documentation: Integer size can be determined using the constant PHP_INT_SIZE On some systems, I believe that the word "integer" will refer to objects of different sizes, such that pack("i", _) could point to an object of size X bytes and PHP_INT_SIZE return value Y which is inconsistent. /main/main.c l.1796: REGISTER_MAIN_LONG_CONSTANT("PHP_INT_SIZE", sizeof(long), CONST_PERSISTENT | CONST_CS); /ext/standard/pack.c l.402-403: php_pack(argv[currentarg++], sizeof(int), int_map, &output[outputpos]); outputpos += sizeof(int); Reproduce code: --------------- file_put_contents("test.bin",pack("I", 2)); var_dump(PHP_INT_SIZE === filesize("test.bin")); Expected result: ---------------- bool(true) Actual result: -------------- bool(false) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=49636&edit=1