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The opendir() function opens a directory handle to be used by the closedir(), readdir(), and rewinddir() functions.
opendir()函数的作用是:打开目录句柄。
This function returns a directory stream on success and FALSE and an error on failure. You can hide the error output by adding an '@' in front of the function name.
如果该函数成功运行,将返回一组目录流(一组目录字符串),如果失败将返回错误[error]。你可以在函数的最前面加上“@”来隐藏错误。
opendir(directory,context) |
Parameter 参数 | Description 描述 |
---|---|
directory | Required. Specifies the directory to stream 必要参数。指定目录对象 |
context | Optional. Specifies the context of the directory handle. Context is a set of options that can modify the behavior of a stream 可选参数。指定需要处理的目录对象的context。这个context包括了一组选项,它可以对文本流的显示方式进行改变 |
Note: From PHP 5 the directory parameter supports the ftp:// URL wrapper.
注意:PHP 5.0以上版本中,目录参数支持ftp://URL。
<?php //Open images directory $dir = opendir("images"); //List files in images directory while (($file = readdir($dir)) !== false) { echo "filename: " . $file . "<br />"; } closedir($dir); ?> |
The output of the code above could be:
上述代码将输出下面的结果:
filename: . filename: .. filename: cat.gif filename: dog.gif filename: food filename: horse.gif |
This example hides the error if opendir() fails:
这个例子展示了:如果dir()函数运行失败,自动将错误信息隐藏。具体如下:
<?php //Open images directory $dir = @ opendir("images"); //List files in images directory while (($file = readdir($dir)) !== false) { echo "filename: " . $file . "<br />"; } closedir($dir); ?> |
The output of the code above could be:
上述代码将输出下面的结果:
filename: . filename: .. filename: cat.gif filename: dog.gif filename: food filename: horse.gif |