PHP css file background image downloader implementation code

/**
*@ATANG 2013-4-6 22:19
*@哈哈
*/
set_time_limit(0);
error_reporting(E_ERROR);
if($argc<4){
print_r('
 +----- --------------------------------------------------+
Usage: php ' .$argv[0].' css path type (0 is remote, 1 is local) css file path image saving directory
Example:
php.exe '.$argv[0].' 0 http://www.xxx .com/index.css images
 +------------------------------------------------- --------+
');
exit();
}
//Remote css
if($argv[1]==0){
 $host = getParse($argv[2], 'host');
 $savePath = getSavePath($argv[3]);
 $images = getCssImagesArray($argv[2]);
 //print_r($images);
 $imagesurls = getImagesLinks($images,$ argv[2]);
 imagesDowner($imagesurls);
}
//Local css starts
if($argv[1]==1){
 //Too lazy to write, haha, this doesn’t make much sense
}
 /*
 * css image analysis function
 * $csspath css file path
 */
function getCssImagesArray($csspath){
 $cssFile = file_get_contents($csspath);
 $images = array();
 preg_match_all("|url ((.+))|i",$cssFile,$images);
 $images = $images[1];
 return $images;
}
/*
 * css file relative directory processing function
 * $path path
 */
function getNocssPath($path){
 global $host;
 $tempLinkmages='';
 //Get equivalent path
 $tempPath = explode('/',$path);
 for($i=1 ;$i<(count($tempPath)-2);$i++){
 $tempLinkmages .= $tempPath[$i].'/';
 }
 $xdImage = $host.$tempLinkmages;
 return $xdImage ;
 //Get equivalent path
}

/*
 * Image connection acquisition function
 * $images array All the images arrays that need to be obtained
 * cssLink css file links
 */
function getImagesLinks($imagesArray,$cssLink){
global $host;
$urlImages = array();
 foreach($imagesArray as $key=>$value){
 if(pathCheck($value)){
 if((!in_array(($host.$ value),$urlImages))){
 $urlImages[$key] = $host.$value;
 }
 }else{
 if((!in_array((getNocssPath(getParse($cssLink,'path'))). $value),$urlImages))){
 $urlImages[$key] = getNocssPath(getParse($cssLink,'path')).$value;
 }
 }
 }
 return $urlImages;
}

/ *
 * Image acquisition
 * $urlImages is the array of images that need to be downloaded
 */
function imagesDowner($urlImages){
//print_r($urlImages);
 foreach($urlImages as $key=>$value){
 $urlImagesOk[$key] = str_replace('//','/',$value);
 $urlImagesOk[$key] = str_replace('"','',$urlImagesOk[$key]);
 $urlImagesOk [$key] = str_replace("'",'',$urlImagesOk[$key]);
 $urlImagesOk[$key] = 'http://'.$urlImagesOk[$key];
 if(grabImage($ urlImagesOk[$key],basename($urlImagesOk[$key]))){
 print_r(
basename($urlImagesOk[$key]).' The file was downloaded successfully
');
 }else{
 print_r(
basename( $urlImagesOk[$key]).' Download failed
');
 }
 }
 //print_r($urlImagesOk);
}
/*
 * Relative path absolute path determination function
 * $imageUrl image link array
 * true is an absolute path
 * false is an equivalent path
 */
function pathCheck($imageUrl){
 if(preg_match('|^(/)|',$imageUrl)){
 return true;
 }else{
 return false;
 }
}

/*
 * Image download function
 * $url image link
 * $filename image name
 */
function grabImage($url, $filename){
 global $savePath;
 if($ url == '') {
 return false; //If $url is empty, return false;

 }
 $ext_name = strrchr($url, '.'); //Get the extension of the image
 if($ ext_name != '.gif' && $ext_name != '.jpg' && $ext_name != '.bmp' && $ext_name != '.png') {
 return false; //The format is not within the allowed range

 }
 if($filename == '') {
 return false; //Invalid name

 }
 //Start capturing
 ob_start();
 if(readfile($url)){
 $img_data = ob_get_contents();
 ob_end_clean();
 $size = strlen($img_data);
 }else{
 ob_end_clean();
 return false;
 }
    if(($local_file = fopen($savePath.$filename , 'a'))&&(fwrite($local_file, $img_data)))
    {
        fclose($local_file);
        return true;
    }
}
/*
 * 保存目录
 */
function getSavePath($savepath){
    $savePath = $savepath;
    $savePath = dirname(__FILE__).$savePath;
    return $savePath;
}
/*
 * 解析url
 */
function getParse($host,$type){
    $baseurl = parse_url($host);
    return $baseurl[$type].'/';

//echo $baseurl;
}
?>