root/modules/branches/2.10/fw_fop/uninstall.php

<?php
/*
 * Mimic the amportal code that stops FOP server. If we don't do it here, then once
 * uninstalled amportal will no longer stop FOP since it is invoked with a hook which
 * will be gone.
 *
    if [ "$pid_length" != "0" -a "$pid_length" != "" ]
    then
         ps -ef | grep safe_opserver | grep -v grep | awk '{print $2}' | xargs kill
        killall op_server.pl
        echo "FOP Server Stopped"
    fi
 */
global $amp_conf;

$pidof = fpbx_which("pidof");
if ($pidof === false) {
    $pidof = "/sbin/pidof";
}
$awk = fpbx_which("awk");
$ps = fpbx_which("ps");
$grep = fpbx_which("grep");
$xargs = fpbx_which("xargs");
$echo = fpbx_which("echo");
$kill = fpbx_which("kill");
$killall = fpbx_which("killall");

outn("Checking FOP servers status..");
$pid_length = trim(`$pidof -x op_server.pl | $awk '{print length($0)}'`);
if ($pid_length) {
    out("running got $pid_length");
    outn("Trying to stop safe_opserver..");
    $kill_args = trim(`$ps -ef | $grep safe_opserver | $grep -v grep | $awk '{print $2}' | $xargs $echo`);
    outn("processes $kill_args..");
    exec("$kill $kill_args", $kill_arr, $ret);
    if (!$ret) {
        out("stopped");
        outn("trying to stop op_server.pl..");
        exec("$killall op_server.pl", $killall_arr, $ret);
        if (!$ret) {
            out("stopped");
        } else {
            out("failed");
            out("you may need to reboot the server to stop the FOP services");
        }
    } else {
        out("failed");
        out("you may need to reboot the server to stop the FOP services");
    }
} else {
    out("not running");
}

// TODO: remove the symlink created by retrieve_conf. Probably need to look at
//       modifying module_admin so this is done automatically when a module is
//       uninstalled and probably even disabled.
//
//$hook = $amp_conf['ASTVARLIBDIR'] . "/freepbx_engine_hook_fw_fop";
$hook = $amp_conf['AMPBIN'] . "/freepbx_engine_hook_fw_fop";
if (is_link($hook) || is_file($hook)) {
    outn("removing freepbx_engine_hook_fw_fop..");
    if (unlink($hook)) {
        out("removed");
    } else {
        out("failed to remove");
        out("ERROR: The following symlink/file must be removed: $hook");
    }
} else {
    out("$hook is not there");
}