<?php

/*
 * Check environment
 */

function is_prod() {
    if ( home_url() == '<production-url>' ) {
        return true;
    }
    else {
        return false;
    }
}

/*
 * Basic file versioning
 * Note: probably better to use `md5_file` instead of `filemtime`
 * http://www.php.net/manual/en/function.md5-file.php
 */

function version($filename) {
    // get the absolute path to the file
    $pathToFile = TEMPLATEPATH . '/' . $filename;

    //check if the file exists
    if (file_exists($pathToFile)) {
        $needle = '.';
        // return the versioned filename based on the last modified time
        $versioned = '.' . filemtime($pathToFile) . '.';
        // the position of the last instance of '.'
        $pos = strrpos($filename, $needle);
        if ($pos !== false) {
            // replace and return
            return '/' . substr_replace($filename, $versioned, $pos, strlen($needle));
        }
    }
    else {
        // return the original filename
        return '/' . $filename;
    }
}

?>