#31324 [Fbk->Opn]: function strlen miscounts

ID: 31324 User updated by: phpbug at tore dot cc Reported By: phpbug at tore dot cc -Status: Feedback +Status: Open Bug Type: Strings related Operating System: Solaris 10 PHP Version: 5.0.2 New Comment: I have used gcc2 and gcc3 to compile. The machine is a sparc. The problem occurs on solaris 9 and solaris 10. If you suspect that this is a solaris problem, can you extract the code for 'strlen' in php. I could make some tests in C.... Previous Comments: ------------------------------------------------------------------------ [2004-12-28 23:59:37] derick@php.net It still works fine for me on Linux. Which compiler did you use to compile PHP (gcc or sun workshop), and what kind of platform do you use? intel (32/64), sparc... ------------------------------------------------------------------------ [2004-12-28 23:40:36] phpbug at tore dot cc Sorry, my mistake! It seems to work on one char long strings. I made a better script (still avoiding loops...). <?php $s=pack("C*",0x8e,0x8f); $t=pack("C*",0x8e); $u=pack("C*",0x8e,0x8f,0x90); print "The variable s has the length: " . strlen($s) . "\n"; print "The variable t has the length: " . strlen($t) . "\n"; print "The variable u has the length: " . strlen($u) . "\n"; ?> Result: The variable s has the length: 1 The variable t has the length: 1 The variable u has the length: 2 The result should be: The variable s has the length: 2 The variable t has the length: 1 The variable u has the length: 3 Since s=2 chars, t=1 char and u 3 chars long. Lets try another test with 7 bit chars. <?php $s=pack("C*",0x30,0x31); $t=pack("C*",0x30); $u=pack("C*",0x30,0x31,0x32); print "The variable s has the length: " . strlen($s) . "\n"; print "The variable t has the length: " . strlen($t) . "\n"; print "The variable u has the length: " . strlen($u) . "\n"; ?> Result: The variable s has the length: 2 The variable t has the length: 1 The variable u has the length: 3 As expected. No problem with low values on the chars. ------------------------------------------------------------------------ [2004-12-28 23:07:29] derick@php.net Please try using this CVS snapshot: http://snaps.php.net/php5-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php5.0-win32-latest.zip Both in 4.3.10RC2, 5.0.3-dev, and 5.1.0-dev it prints as expected: The variable s has the length: 1 (actual length) 1 So please try a snapshot. ------------------------------------------------------------------------ [2004-12-28 21:57:50] phpbug at tore dot cc How about: <?php $s=pack("C",143); $result = count_chars($s, 0); print "The variable s has the length: " . strlen($s) . " (actual length) " . $result[143] . "\n"; ?> Gives printout: The variable s has the length: 0 (actual length) 1 The 'pack' creates a bit-string with a length of 1 char. The 'strlen' should should recognize it as a char with length 1. As you can see below 'strlen' does not only miscalculates the string length for the char 143. ------------------------------------------------------------------------ [2004-12-28 19:19:36] derick@php.net I don't understand what your script is doing, please come up with a trivial script instead of those loops. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/31324 -- Edit this bug report at http://bugs.php.net/?id=31324&edit=1