php 文件总结

通过一下代码，总结php文件函数

// current directory
echo getcwd() . "\n";
chdir('hhh');
// current directory
echo getcwd() . "\n";

D:\xampp\htdocs\my\function
D:\xampp\htdocs\my\function\hhh

$dir = 'D:\xampp\htdocs\my\function';
// Open a known directory, read directory into variable and then close
if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        $ds = array();
        while ($directory = readdir($dh)) {
            $ds[] = $directory;
        }
        rewinddir($dh);
        while ($directory = readdir($dh)) {
            $ds[] = $directory;
        }
        closedir($dh);
    }
}
print_r($ds);

Array ( [0] => . [1] => .. [2] => file.php [3] => hhh [4] => . [5] => .. [6] => file.php [7] => hhh )

$dir = 'D:\xampp\htdocs\my\function';
showfiles3($dir);

function showfiles1($dir)
{
    if (is_dir($dir))
    {
        echo "<ul>";
        $dh = opendir($dir);
        while ($file = readdir($dh))
        {
            if (is_dir($dir.DIRECTORY_SEPARATOR.$file))
            {
                if ($file !='.' && $file != '..') {
                    echo "<li>";
                    echo "|-".$file;
                    showfiles1($dir.DIRECTORY_SEPARATOR.$file);
                    echo "</li>";
                }
            } else{
                echo "<li>";
                echo "--".$file;
                echo "</li>";
            }
        }
        closedir($dh);
        echo "</ul>";
    }
}

function showfiles2($dir)
{
    echo "<ul>";
    $arr = scandir($dir);
    foreach ($arr as $file)
    {
        if (is_dir($dir.DIRECTORY_SEPARATOR.$file))
        {
            if ($file !='.' && $file != '..') {
                echo "<li>";
                echo "|-".$file;
                showfiles2($dir.DIRECTORY_SEPARATOR.$file);
                echo "</li>";
            }
        } else{
            echo "<li>";
            echo "--".$file;
            echo "</li>";
        }
    }
    echo "</ul>";
}

function showfiles3($dir) 
{
      foreach (glob($dir.DIRECTORY_SEPARATOR.'*') as $f)
    {
        echo is_dir($f) ? showfiles3($f) : "$f<br />";           
    }
}

$dir = 'D:\xampp\htdocs\my\function';
$d = scandir($dir, 1);
print_r($d);

Array ( [0] => hhh [1] => file.php [2] => .. [3] => . )

//目录的检索函数glob()

//检索当前目录下所有"*.txt"的文件

$files = glob("*.txt");


//检索当前目录下所有以"t"开头的子目录

$files = glob("t*",GLOB_ONLYDIR);


//检索当前目录下所有以"d,t或p"开头的php文件

$files = glob("{d,t,p}*.php",GLOB_BRACE);

一点小疑问：.文件和 ..文件的详细分析

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