PHP function for use with FreePBX that accepts a DAHDI group as an argument, and returns an array of DAHDI channels (if any) for that goup

group2chan.php

<?php

// This function works within FreePBX or with FreePBX 2.9+ bootstrap loader 
// $astman (phpagi class) already declared

function group2chan($groupid) {
	global $astman;

	// strip non-digits and assume the remaining number is the group number
	$groupid = preg_replace("/[^0-9]*/", "", $groupid); 

	// use phpagi class to query channels in dahdi group
	$data = $astman->command("dahdi show channels group $groupid");

	foreach(explode("\n", $data['data']) as $line) {
		// catch the leading digits of each line and ignore the rest of the line
		preg_match("~^.*?(\d+?) .*~",$line,$foo);
		if (trim($foo[1]) != "") {
			$channels[] = trim($foo[1]);
		}
	}
	if (isset($channels)) {
		return $channels;
	}
	else {
		return false;
	}
}