Asterisk PHP Agi Record calls

Hello

i need someone to provide me a sample php agi script that will record an incomming call after it's picked up by the user

say call is coming form trunk 1 and intended to go to SIP/2001

i am currently using the code bellow to connect the call

require('[url removed, login to view]');

$agi=new AGI();

$agi->answer();

$agi->exec('Dial', "SIP/2001",30,r");

$agi->hangup();

code is working fine i just need to record the conversation

i have tried the monitor but getting -1 everytime

Asterisk PBX PHP Ubuntu UNIX

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