使用PHP编写的SVN类

代码如下:
<?php
/**
 * SVN 外部命令 类
 *
 * @author rubekid
 *
 * @todo comment need addslashes for svn commit
 *
 */
class SvnUtils {
    /**
     *
     * svn 账号
     */
    const SVN_USERNAME = "robot";
    /**
     * svn 密码
     */
    const SVN_PASSWORD = "robot2013";
    /**
     * 配置文件目录   (任意指定一个临时目录,解决svn: warning: Can't open file '/root/.subversion/servers': Permission denied)
     */
    const SVN_CONFIG_DIR = "/var/tmp/";

    /**
     * svn list
     *
     * @param $repository string
     * @return boolean
     *
     */
    public static function ls($repository) {
        $command = "sudo svn ls " . $repository;
        $output = self::runCmd ( $command );
        $output = implode ( "<br />", $output );
        if (strpos ( $output, 'non-existent in that revision' )) {
            return false;
        }
        return "<br />" . $command . "<br />" . $output;
    }
    /**
     * svn copy
     *
     * @param $src string
     * @param $dst string
     * @param $comment string
     * @return boolean
     *
     */
    public static function copy($src, $dst, $comment) {
        $command = "sudo svn cp $src $dst -m '$comment'";
        $output = self::runCmd ( $command );
        $output = implode ( "<br />", $output );
        if (strpos ( $output, 'Committed revision' )) {
            return true;
        }
        return "<br />" . $command . "<br />" . $output;
    }
    /**
     * svn delete
     *
     * @param $url string
     * @param $comment string
     * @return boolean