PHP Shell脚本获取所有WordPress Themes

#! /usr/bin/php
<?php 
set_time_limit(0);
$base='http://wordpress.org/extend/themes/browse/popular/page/';
for($i=1;$i<98;$i++){
    $currentPage=$base.$i;
    $currentContent=file_get_contents($currentPage);
    $blocks=explode('<div class="plugin-block">',$currentContent);
    for($j=1;$j<count($blocks);$j++){
        $tmp=explode('<h3><a href="',$blocks[$j]);
        $tmp=explode('">',$tmp[1]);
        $themePage=$tmp[0];
        echo $themePage."\r\n";
        $pagecontent=file_get_contents($themePage);
        $tmp=explode('<a class="activatelink" href="',$pagecontent);
        $tmp=explode('">',$tmp[1]);
        $downloadUrl=$tmp[0];
        echo $downloadUrl."\r\n";
        exec('wget '.$downloadUrl);
    }
}
?>