Argument not passed when calling tts.php from an AGI

FreePBX Development
1

I’m trying to do some dynamic TTS via an AGI, which involves calling tts.php included with the freePBX distro from within another AGI.

The following dial plan works exactly as expected: (The voice is ugly, but it works.)

exten => 5577001,1,Answer()
exten => 5577001,n,Set(TTSText=‘THIS IS A TEST OF TEXT TO SPEECH’)
exten => 5577001,n,AGI(tts.php,${TTSText})
exten => 5577001,n,Hangup()

However this code within an AGI does not pass the argument:

$text="'I AM SORRY. I GOT RESPONSE CODE 331 AND   TOTAL CUSTOMERS.'";
$myagi->exec_agi("tts.php",$text);
fflush(STDOUT);

I modified tts.php slightly to hard code the engine and for more diagnostic output:

$text = $argv[1];
$hash = md5($text);
$engine = "flite";
$enginebin = "/usr/bin/flite";
if (!isset($text))
{
     debug("TTS GOT NO TEXT", 1);
     return 0;
}

And this is what I get in cli debug:

<SIP/xxx>AGI Tx >> agi_request: lime-get-ord.php
== other channels stuff ===
<SIP/xxx>AGI Tx >>
<SIP/xxx>AGI Rx << #!/usr/bin/php
<SIP/xxx>AGI Tx >> 510 Invalid or unknown command
<SIP/xxx>AGI Rx << VERBOSE "Starting lime-get-ord: 8596352415" 1
 lime-get-ord.php,8596352415: Starting lime-get-ord: 8596352415
<SIP/xxx>AGI Tx >> 200 result=1
<SIP/xxx>AGI Rx << EXEC AGI tts.php 'I AM SORRY. I GOT RESPONSE CODE 331 AND  TOTAL CUSTOMERS.'
    -- AGI Script Executing Application: (AGI) Options: (tts.php)
    -- Launched AGI Script /var/lib/asterisk/agi-bin/tts.php
<SIP/xxx>AGI Tx >> agi_request: tts.php
<SIP/xxx>AGI Tx >> agi_channel: SIP/xxx
== other channels stuff ===
<SIP/xxx>AGI Tx >>
<SIP/xxx>AGI Rx << VERBOSE "TTS AGI Started" 1
 tts.php: TTS AGI Started
<SIP/xxx>AGI Tx >> 200 result=1
<SIP/xxx>AGI Rx << VERBOSE "TTS GOT NO TEXT" 1
 tts.php: TTS GOT NO TEXT
<SIP/xxx>AGI Tx >> 200 result=1
    -- <SIP/xxx>AGI Script tts.php completed, returning 0

So I don’t understand why my $text argument is not being passed. What am I doing wrong?

Also, Why would I be getting a “510 Invalid or unknown command” on my shebang?

Thanks for helping!