[OpenSIPS-Users] string comparison

[John Quick]

Hi Volga,

I just added a check on one of my test servers, making use of some existing code that sets a variable $var(srctype) to various values including:

  if (is_registered("location"))
      $var(srctype) = "regd-user";

The new code I added just below looks like this:

  $var(teststr) = "regd-user";
  if ($var(srctype) == $var(teststr))
     xlog("L_WARN", "## SOURCE IS A REGISTERED USER ##\n");

Then I registered an IP Phone and made a call. Output to my log file:
2020-04-23 15:10:40  ## SOURCE IS A REGISTERED USER ##

So the basic test for comparing strings should work. There must be some other explanation.
I have known situations where it was necessary to cast a string value to be recognised as an integer, but you are only testing strings.
Could there be a leading or trailing space? Perhaps you need to use a trim function. Check out the string transformations:
https://www.opensips.org/Documentation/Script-Tran-2-4#toc1
To understand what is happening you could try using regex test, =~  instead of equality, ==
You could report the length of the string values stored in the two vars, using {s.len} transformation (see above link).

John Quick
Smartvox Limited


-----Original Message-----
From: volga629 <volga629 at networklab.ca> 
Sent: 23 April 2020 14:43
To: john.quick at smartvox.co.uk; users at lists.opensips.org
Subject: Re: [OpenSIPS-Users] string comparison

Hello John,

I tested var to var

and test still failing

Tried

  if($var(tls-frompbx)=="$var(usr_check_tls)")

or this

  if($var(tls-frompbx)==$var(usr_check_tls))

volga629


On 4/23/20 9:41 AM, John Quick wrote:
> Hi Volga
>
> Please could you always format your emails to the users group as plain 
> text, not HTML.
> I had to copy and paste then save and re-open just to read your question.
>
> I would think the most likely explanation for the string comparison 
> failing is that you are comparing an $avp with a $var They are 
> different - in particular, an AVP can hold several values, somewhat 
> like an array type in other languages.
> Can you try the same test but with a var for both sides of the comparison.
>
> John Quick
> Smartvox Limited
>
>
>