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Doc Bug #52066 lack of precision in section entitled 'back references'
Submitted: 2010-06-12 16:47 UTC Modified: 2010-08-18 13:33 UTC
From: 3 dot grosz at gmail dot com Assigned: salathe (profile)
Status: Closed Package: Documentation problem
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
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 [2010-06-12 16:47 UTC] 3 dot grosz at gmail dot com 
Description:
------------
PHP documentation entitled 'back references' states that: "In other words, the parentheses that are referenced need not be to the left of the reference for numbers less than 10." I think that this sentence in documentation is too short. I found excerpt in PCRE documentation (http://www.pcre.org/pcre.txt) that extends above sentence.
"In other words, the parentheses that are referenced need not be to the left of the reference for numbers less than 10. A "forward back reference" of this type can make sense when a repetition is involved and the subpattern to the right has participated in an earlier iteration.
It is not possible to have a numerical "forward back reference" to a subpattern whose number is 10 or more using this syntax because a sequence such as \50 is interpreted as a character defined in octal."
In my opinion the extended sentence is better to understand.

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 [2010-06-22 09:58 UTC] salathe@php.net
-Assigned To: +Assigned To: salathe
 [2010-08-18 13:31 UTC] salathe@php.net 
Automatic comment from SVN on behalf of salathe
Revision: http://svn.php.net/viewvc/?view=revision&revision=302431
Log: Mention "forward back reference" in PCRE syntax (doc bug #52066)
 [2010-08-18 13:33 UTC] salathe@php.net
-Status: Assigned +Status: Closed
 [2010-08-18 13:33 UTC] salathe@php.net 
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.
 
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