php 文件总结

通过一下代码，总结php文件函数

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

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

$dir = 'D:\xampp\htdocs\my\function';// Open a known directory, read directory into variable and then closeif (is_dir($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 "

"; $dh = opendir($dir); while ($file = readdir($dh)) { if (is_dir($dir.DIRECTORY_SEPARATOR.$file)) { if ($file !='.' && $file != '..') { echo "
• "; echo "|-".$file; showfiles1($dir.DIRECTORY_SEPARATOR.$file); echo "
"; } } else{ echo "
• "; echo "--".$file; echo "
"; } } closedir($dh); echo "

"; }}function showfiles2($dir){ echo "

"; $arr = scandir($dir); foreach ($arr as $file) { if (is_dir($dir.DIRECTORY_SEPARATOR.$file)) { if ($file !='.' && $file != '..') { echo "
• "; echo "|-".$file; showfiles2($dir.DIRECTORY_SEPARATOR.$file); echo "
"; } } else{ echo "
• "; echo "--".$file; echo "
"; } } echo "

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

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