Output an easy-to-read number

fltr.humanNumber.php

<?php
$optionsXpld = @explode('&', $options);
$optionsArray = array();
foreach ($optionsXpld as $xpld) {
    $params = @explode('=', $xpld);
    array_walk($params, create_function('&$v', '$v = trim($v);'));
    if (isset($params[1])) {
        $optionsArray[$params[0]] = $params[1];
    } else {
        $optionsArray[$params[0]] = '';
    }
}
$stripWords = isset($optionsArray['stripWords']) ? $optionsArray['stripWords'] : null;
$decimals = isset($optionsArray['decimals']) ? $optionsArray['decimals'] : 0;
#    Output easy-to-read numbers
#    by james at bandit.co.nz
$number = $input;
        // first strip any formatting;
        $n = (0+str_replace(",","",$number));
        
        // is this a number?
        if(!is_numeric($n)) return false;
        
        // now filter it;

    if ($n>1000000000000):
    $num = round(($n/1000000000000),1);
    $wrd = 'trillion';
elseif ($n>1000000000):
    $num = round(($n/1000000000),1);
    $wrd = 'billion';
elseif ($n>1000000):
    $num = round(($n/1000000),1);
    $wrd = 'million';
elseif ($n>1000):
    $num = round(($n/1000),1);
    $wrd = 'thousand';
elseif ($n>100):
    $num = round(($n/100),1);
    $wrd = 'hundred';
endif;

if($stripWords=1){
        $output = number_format($num, $decimals);
}else{
        $output = number_format($num, $decimals) . " " . $wrd;    
}
        return $output;