/寻址和./寻址之间有什么区别？ [重复]

Question

This question already has an answer here:

• What is double dot(..) and single dot(.) in Linux? 4 answers

I am working on a PHP website where I needed to get a list of the files in the Images directory. The example in PHP.net shows the addressing with just a forward slash as shown in the example. This addressing pattern did not work. Instead the address needs to start with ./ . What is the difference?

<?php
$dir    = '/tmp';
$files1 = scandir($dir);
$files2 = scandir($dir, 1);

print_r($files1);
print_r($files2);
?>

A search for other questions have addressed single dot and double dot, but I don't see posts for a forward slash with no dot.

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Answer 1

the . indicates the current directory. Assume, for instance, that your current path is /var/www:

If you say ./tmp the directory you are looking for is /var/www/tmp

If you say /tmp you are looking for /tmp (starting from the root)