[asterisk-users] AGI PHP script

[Steve Edwards]

Un-top-posting and de-crufting, with some comments cast inline...

>> 2009/4/23 James A. Shigley <jas at answeringserv.com 
>> <mailto:jas at answeringserv.com>>
>>
>>     I have the below script that doesn’t seem to be working. I don’t
>>     know if I have something in the script wrong that I am just missing.
>>     Or if I don’t have the php.ini set correctly for emailing
>>
>>     This is the CLI output
>>     -- Executing [4099XXXXXX at port3_real:1] Goto("DAHDI/50-1",
>>     "newhire,s,1") in new stack
>>         -- Goto (newhire,s,1)
>>         -- Executing [s at newhire:1] Ringing("DAHDI/50-1", "") in new stack
>>         -- Executing [s at newhire:2] Answer("DAHDI/50-1", "") in new stack
>>         -- Executing [s at newhire:3] Monitor("DAHDI/50-1","wav,/var/lib/asterisk/sounds/NewHire/Newhire-1240503071.15148-4099819213-s,o") in new stack
>>         -- Executing [s at newhire:4] AGI("DAHDI/50-1", "newhire.php") in new stack
>>         -- Launched AGI Script /var/lib/asterisk/agi-bin/newhire.php
>>         -- <DAHDI/50-1>AGI Script newhire.php completed, returning 0
>>         -- Auto fallthrough, channel 'DAHDI/50-1' status is 'UNKNOWN'
>>         -- Hungup 'DAHDI/50-1'

"Auto fallthrough" means you "fell off the end of your dialplan." I prefer 
to explicitly code a "hangup" so the next guy knows what was supposed to 
happen rather that what happened to happen :)

When you post CLI output, the relevant snippet of extensions.conf can be 
helpful.

>>     Here is the script
>>
>>     #!/usr/bin/php5
>>     <?php
>>
>>     // Get AGI vars from *
>>      $agivars = array();
>>      while (!feof(STDIN)) {
>>          $agivar = trim(fgets(STDIN));
>>          if ($agivar === '') {
>>              break;
>>          }
>>          $agivar = explode(':', $agivar);
>>          $agivars[$agivar[0]] = trim($agivar[1]);
>>      }
>>      extract($agivars);

While your script is rather trivial, most coders use an established AGI 
library.

>> Besides something not being configured in php.ini correctly any other 
>> ideas?

Yes. Trim your signature splooge.

On Thu, 23 Apr 2009, Mik Cheez wrote:

> Run something like the following:
>
> [hoof at mouth tmp]# echo this is a test | newhire.php
>
> If the script runs, check your maillog (/var/log/maillog) to see if 
> there's any evidence of what may have happened.

You can feed the entire AGI environment through STDIN. Here's a sample 
script:

# the standard AGI environment variables
         echo "agi_accountcode: "
         echo "agi_callerid: 1234567890"
         echo "agi_calleridname: agi-environment.sh"
         echo "agi_callingani2: 0"
         echo "agi_callingpres: 0"
         echo "agi_callingtns: 0"
         echo "agi_callington: 0"
         echo "agi_channel: SIP/1234567890"
         echo "agi_context: newhire"
         echo "agi_dnid: *"
         echo "agi_enhanced: 0.0"
         echo "agi_extension: 4099819213"
         echo "agi_language: en"
         echo "agi_priority: 1"
         echo "agi_rdnis: unknown"
         echo "agi_request: newhire.php"
         echo "agi_type: SIP"
         echo "agi_uniqueid: 1240503071.15148"
         echo ""

Save it as agi-environment.sh and use it like:

 	sh agi-environment.sh | newhire.php

If you suspect an environment variable problem you could use:

 	sh agi-environment.sh | env --ignore-environment newhire.php

Your script doesn't do anything else with the AGI environment, but you can 
extend my script to include the proper response to most AGI requests. It's 
a very powerful debugging technique.

I write my AGIs in C. It totally rocks to edit your source code in emacs 
with gdb running in another buffer reading the AGI environment and request 
responses from a text file while you step through your code line by line.

I'm not a serious PHP hacker, but if you have a PHP IDE maybe the same 
technique would work.

Thanks in advance,
------------------------------------------------------------------------
Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                             Fax: +1-760-731-3000