rewinddir()
(PHP 4, PHP 5, PHP 7)
倒回目录句柄
说明
rewinddir(resource $dir_handle): void
将$dir_handle指定的目录流重置到目录的开头。
参数
- $dir_handle
目录句柄的resource,之前由opendir()打开
/* Source Code */ <?php $dir = "/images/"; // Open a directory, and read its contents if (is_dir($dir)){ if ($dh = opendir($dir)){ // List files in images directory while (($file = readdir($dh)) !== false){ echo "filename:" . $file . "<br>"; } rewinddir(); // List once again files in images directory while (($file = readdir($dh)) !== false){ echo "filename:" . $file . "<br>"; } closedir($dh); } } ?> /* Result */ filename: cat.gif filename: dog.gif filename: horse.gif filename: cat.gif filename: dog.gif filename: horse.gif
It is crucial to note that rewinddir() does not simply start over at the beginning of the SAME directory list. Instead, this function first re-reads the directory - thus any file that were deleted (or inserted) since the original opendir() will be reflected after "rewinding". In that respect, rewinddir() is equivalent to a closedir(), opendir() sequence, but without obtaining a new handle.