Error: "Can't find nonce in www-auth" -cause regex defined not correctly

[Carsak]

I cant auth to sip server, cause class PhpSip cant parse "nonce"

in code we have line
line if (!preg_match('/^WWW-Authenticate: .* nonce="(.*)"/imU',$this->rx_msg, $m))

But I got this string in rx_msg

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.56.1:52619;rport=52619;received=192.168.56.1;branch=z9hG4bK400475
Call-ID: bd83da2e3b1bea8bd05a0d4f86a95651@192.168.56.1
From: <sip:demo-bob@192.168.56.1>;tag=29476
To: <sip:demo-bob@192.168.56.101>;tag=z9hG4bK400475
CSeq: 20 INVITE
WWW-Authenticate: Digest realm="asterisk",nonce="1674462773/ed4af0596a23a091b977b82551037698",opaque="5c230e6a1b3ca71a",algorithm=MD5,qop="auth"
Server: Asterisk PBX 20.1.0
Content-Length:  0

So the regexp pattern must be /.*WWW-Authenticate: .* nonce="(.*)"/imU
not /^WWW-Authenticate: .* nonce="(.*)"/imU

[Carsak]

I was wrong

[Carsak]

I cant figure out, why I got error if regexp is correct.
I checked this on regexOnline
it is correct:

But in php i got error:

the text is same

[Carsak]

could somebody explain why this regexp dont work?
https://onlinephp.io/c/221e2

[livetechPT]

Is the spaces in the expression. Remove spaces! if (!preg_match('/^WWW-Authenti*cate**:.*n**once*="(.*)"/miU',$x, $m)) { Às 09:37 de 2023/01/23, Alma Z escreveu:

…

could somebody explain why this regexp dont work? https://onlinephp.io/c/221e2 — Reply to this email directly, view it on GitHub <#12 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEZETTMNJ67S377DWCAWR4TWTZGMHANCNFSM6AAAAAAUDR4CV4>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[Carsak]

OMG. yes.
So, correct pattern should be
/^WWW-Authenticate:.*nonce="(.*)"/imU
not
/^WWW-Authenticate: .* nonce="(.*)"/imU