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The dir() function opens a directory handle and returns an object. The object contains three methods called read() , rewind() , and close() .
dir()函数的作用是:打开目录并返回其中的对象。这个对象包括三个参数“read()、rewind()、close()”
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。
dir(directory) |
Parameter 参数 | Description 描述 |
---|---|
directory | Required. Specifies the directory to stream 必要参数。指定目录对象 |
<?php //Open images directory $dir = dir("images"); //List files in images directory while (($file = $dir->read()) !== false) { echo "filename: " . $file . "<br />"; } $dir->close(); ?> |
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 dir() 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 $dir = @ dir("images"); //List files in images directory while (($file = $dir->read()) !== false) { echo "filename: " . $file . "<br />"; } $dir->close(); ?> |
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 |