Command line wrapper for emogrifier written in PHP

emo.php

<?php
/* DETECT CLI MODE */ 
if ( isset($_SERVER['argc']) && $_SERVER['argc']>=1 ) { 

    /* CHECK FOR EMOGRIFIER.PHP */    
    if(!file_exists(dirname(__FILE__).'/emogrifier.php')) {
        quit(1,"emogrifier.php is missing.");
    }
    require_once(dirname(__FILE__).'/emogrifier.php');

    /* Make sure we have the right number of arguments */
    if(is_array($argv) && count($argv)>=3 && count($argv)<5) {

        /* Check if the files exist */
        if(!file_exists($argv[1]) || !file_exists($argv[2])) {
            quit(1,"Either the HTML or CSS file doesn't exist!");
        }

        $html = file_get_contents('./'.$argv[1]);
        $css = preg_replace("/\s+/", " ", file_get_contents('./'.$argv[2]));
        $emo = new emogrifier($html,$css);
        if(count($argv)>3 && $argv[3] !=='') {
            file_put_contents($argv[3], $emo->emogrify());
            exit(0);
        } else {
            echo("" . $emo->emogrify());
            exit(0);
        }
        

    } else {
        quit(1,"Error: Wrong number of arguments!");
    }

} else {
    quit(1,"This script is meant to run in command line mode.");
}

/* Helper function used to quit gracefully */
function quit($code,$msg) {
    printf("\n".$msg . "\n\n");
    exit($code);
}
?>