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Bug #13995 continuation of bug #13866: strtok() misparses empty fields
Submitted: 2001-11-08 20:29 UTC Modified: 2001-11-09 02:12 UTC
From: rcpj at panix dot com Assigned:
Status: Closed Package: Strings related
PHP Version: 4.0.6 OS: OpenBSD 2.9-stable
Private report: No CVE-ID: None
 [2001-11-08 20:29 UTC] rcpj at panix dot com
If a string contains two delimiters side by side (i.e. an empty field), strtok() treats the double delimiter as a single one and the results are shifted into the wrong variable. The previous version of the bug kept the second delimiter in the value returned by the function. This version does not, but it returns the wrong substring.

PHP version is 4.2.0-dev

(how do I report the correct version on the report form? Shouldn't there be at least a "other"?)

Example of the bug:
  
$String= "field1|field2||field4";

$Item1=strtok($String,"|");    // $Item1: field1
$Item2=strtok("|");               // $Item2: field2
$Item3=strtok("|");                // $Item3: field4
$Item4=strtok("|");                // $Item4 is empty

compare the outputs of:

http://www.pierrejelenc.com/PHP/test-module.php    (correct)
and
http://www.web-ho.com/PHP/test-module.php    (incorrect)

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 [2001-11-09 02:12 UTC] derick@php.net
This is the expected behavior. It conforms to alteast the C-libraries on Linux, Win32 and Solaris.

Derick
 
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