Sample PHP script to place call using asterisk AMI over http GET

what is Asterisk and AMI

Pre-requisites:

AMI user and permission

    create a new AMI user in asterisk with call and originate permission

Creating a call.php script in webroot folder

cd /var/www/html

vi call.php

<?php

#ip address that asterisk is on.

$strHost = "127.0.0.1";

$strUser = "test";#specify the asterisk manager username you want to login with

$strSecret = "test1234";#specify the password for the above user

#specify the channel (extension) you want to receive the call requests with

#e.g. SIP/XXX, IAX2/XXXX, ZAP/XXXX, etc

# $strChannel = "SIP/100";

$strChannel = $_REQUEST['exten'];

$strContext = "from-internal";

#specify the amount of time you want to try calling the specified channel before hangin up

$strWaitTime = "30";

#specify the priority you wish to place on making this call

$strPriority = "1";

#specify the maximum amount of retries

$strMaxRetry = "2";

$number=strtolower($_REQUEST['number']);

$pos=strpos ($number,"local");

if ($number == null) :

exit() ;

endif ;

if ($pos===false) :

$errno=0 ;

$errstr=0 ;

$strCallerId = "Web Call $number";

$oSocket = fsockopen ("localhost", 5038, &$errno, &$errstr, 20);

if (!$oSocket) {

echo "$errstr ($errno)<br>\n";

} else {

fputs($oSocket, "Action: login\r\n");

fputs($oSocket, "Events: off\r\n");

fputs($oSocket, "Username: $strUser\r\n");

fputs($oSocket, "Secret: $strSecret\r\n\r\n");

fputs($oSocket, "Action: originate\r\n");

fputs($oSocket, "Channel: $strChannel\r\n");

fputs($oSocket, "WaitTime: $strWaitTime\r\n");

fputs($oSocket, "CallerId: $strCallerId\r\n");

fputs($oSocket, "Exten: $number\r\n");

fputs($oSocket, "Context: $strContext\r\n");

fputs($oSocket, "Priority: $strPriority\r\n\r\n");

fputs($oSocket, "Action: Logoff\r\n\r\n");

sleep(2);

fclose($oSocket);

}

echo "Extension $strChannel should be calling $number." ;

else :

exit() ;

endif ;

?>

Followed to that provide the execute permission to the call.php file

chmod 755 call.php

Now execute the file from a browser to test the call 

http://serverip/call.php?exten=SIP/100&number=9999999999

Conclusion:

    you can use the above script to integrate with your crm for click to dial functionality,make sure to send proper variable in the HTTP GET API request to the asterisk server or to your PHP webserver.