php下grep_split拆分特殊字符（斜杠）

 <?php
    show_source(__file__);
    $removeChar = ["https://", "http://"];
    $seourl = 'http://github.com/asdasd/asd';
    $seourl = str_replace($removeChar, "", $seourl); 
    $http_referer = preg_split('#/#', $seourl);
    echo '<br/>';
    print_r($seourl);
    echo '<br/>';
    echo (array_shift($http_referer));
    ?>