Bug #65239 [Asn->Csd]: Strings of 2GB

Edit report at https://bugs.php.net/bug.php?id=65239&edit=1 ID: 65239 Updated by: krakjoe@php.net Reported by: pacerier at gmail dot com Summary: Strings of 2GB -Status: Assigned +Status: Closed Type: Bug Package: Documentation problem Operating System: linux PHP Version: 5.3.26 Assigned To: mumumu Block user comment: N Private report: N New Comment: This bug has been fixed in the documentation's XML sources. Since the online and downloadable versions of the documentation need some time to get updated, we would like to ask you to be a bit patient. Thank you for the report, and for helping us make our documentation better. Previous Comments: ------------------------------------------------------------------------ [2013-11-08 08:06:51] krakjoe@php.net Automatic comment from SVN on behalf of krakjoe Revision: http://svn.php.net/viewvc/?view=revision&revision=332084 Log: #65239 precise maximum ------------------------------------------------------------------------ [2013-07-10 17:47:09] pacerier at gmail dot com Description: ------------ The documentation at http://php.net/manual/en/language.types.string.php states that "string can be as large as 2GB". Now 2GB means 2*1024^3 = 2147483648 bytes. The documentation is misleading, because strings start to misbehave once they get as large as 2147483647 bytes, and not 2147483648 bytes. Yes I know, it's just a 1 byte difference, but it makes a difference between code that works and code that breaks. Test script: --------------- error_reporting(E_STRICT|E_ALL); ini_set('memory_limit', '-1'); $gb = 1024 * 1024 * 1024; $str = str_repeat('a', 2 * $gb); echo $str[0]; // Notice: Uninitialized string offset: 0 Expected result: ---------------- The test script should output the string "a", since http://php.net/manual/en/language.types.string.php specifically claims that strings can be as large as 2147483648 bytes. Alternatively, we should re-word the documentation: Strings can be as large as 2147483647 bytes. Failure to adhere to do so would result in undefined behavior (for example, strlen etc). Actual result: -------------- Notice: Uninitialized string offset: 0 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65239&edit=1