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Bug #76999 mb-regex-set-options return current options
Submitted: 2018-10-11 13:17 UTC Modified: 2018-10-11 13:52 UTC
Avg. Score:3.5 ± 0.5
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: kay dot lukas at gmail dot com Assigned:
Status: Verified Package: mbstring related
PHP Version: 7.1.22 OS: Mac OSX
Private report: No CVE-ID: None
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 [2018-10-11 13:17 UTC] kay dot lukas at gmail dot com
From manual page:

The documentation says that mb_regex_set_options should return the previous results, 

> The previous options. If options is omitted, it returns the string that describes the current options.

This is quite useful so you can change the options and easily set it back to the defaults after you are done with mb_regex. However, it seems to do something totally different, returning the current options instead.

It seems like the internal function is designed for it:

however this functionality is not used in the wrapping function:

null is passed in.

Test script:
php > var_dump(mb_regex_set_options("m"));
string(2) "mr"
php > var_dump(mb_regex_set_options("mdi"));
string(3) "imd"
php > var_dump(mb_regex_set_options("m"));
string(2) "mr"
php > var_dump(mb_regex_set_options("a"));
string(1) "r"


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 [2018-10-11 13:52 UTC]
-Status: Open +Status: Verified -Package: *Regular Expressions +Package: mbstring related
 [2018-10-11 13:52 UTC]
Confirmed: <>.
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