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rewinddir

(PHP 4, PHP 5, PHP 7, PHP 8)

rewinddir倒回目录句柄

说明

rewinddir(?resource $dir_handle = null): void

dir_handle 指定的目录流重置到目录的开头。

参数

dir_handle

之前使用 opendir() 打开的目录句柄 resource。如果未指定目录句柄,则假设是 opendir() 打开的最后一个链接。

返回值

没有返回值。

更新日志

版本 说明
8.0.0 现在 dir_handle 允许为 null。
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User Contributed Notes 2 notes

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6
ASchmidt at Anamera dot net
5 years ago
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.
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6
osamahussain897 at gmail dot com
6 years ago
/* 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
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