pfSense

function execute_command_return_output($command) {

    $fd = popen($command . " 2>&1 ", "r");

    echo "\n<script language=\"JavaScript\">this.document.forms[0].output.value = \"\";</script>";

    $counter = 0;

    $counter2 = 0;

    while(!feof($fd)) {

	$tmp = fread($fd,49);

	$tmp1 = ereg_replace("\n","\\n", $tmp);

	$text = ereg_replace("\"","'", $tmp1);

	if($lasttext == "..") {

	    $text = "";

	    $lasttext = "";

	    $counter=$counter-2;

	} else {

	    $lasttext .= $text;

	}

	if($counter > 51) {

	    $counter = 0;

	    $extrabreak = "\\n";

	} else {

	    $extrabreak = "";

	    $counter++;

	}

	if($counter2 > 600) {

	    echo "\n<script language=\"JavaScript\">this.document.forms[0].output.value = \"\";</script>";

	    $counter2 = 0;

	} else

	    $counter2++;

	echo "\n<script language=\"JavaScript\">this.document.forms[0].output.value = this.document.forms[0].output.value + \"" . $text . $extrabreak .  "\"; f('output'); </script>";

    }

    fclose($fd);

}