php遍历目录

1. [PHP]代码   

<?php

    //遍历文件夹
    echo memory_get_usage() . "\n";

    function traversalDir($path = &#39;.&#39;)
    {
        echo memory_get_usage() . "\n";
        $dir = opendir($path);
        echo memory_get_usage() . "\n";
        while (($file = readdir($dir)) !== false)
        {
            $sub_dir = $path . DIRECTORY_SEPARATOR . $file;    //构建子目录路径  directory_separator

            if ($file == "." || $file == "..")
            {
                continue;
            }
            else if (is_dir($sub_dir))
            {
                echo &#39;Directory &#39; . $file . &#39;:&#39; . "\n";
                traversalDir($sub_dir);
            }
            else
            {
                echo &#39;File in Directory &#39; . $path . &#39;: &#39; . $file . "\n";
            }
        }
    }

    traversalDir();
    echo memory_get_usage() . "\n";

    echo memory_get_usage() . "\n";
    //使用PHP函数处理读取文件及文件夹.
    function loadReadDir($path = ".")
    {
        echo memory_get_usage() . "\n";
        $pathDir = dir($path);
        echo memory_get_usage() . "\n";
        while(($file = $pathDir->read()) !== false)
        {
            $dir = $path . DIRECTORY_SEPARATOR . $file;

            if ($file == "." || $file == "..")
            {
                continue;
            }
            else if (is_dir($dir))
            {
                echo "directory:" . $file . "\n";
                loadReadDir($dir);
            }
            else
            {
                echo "fileName:" . $file . "\n";
            }
        }

        $pathDir->close();
    }

    loadReadDir();

    echo memory_get_usage() . "\n";