使用preg_match从文件名中删除根目录

Question

This is probably a super-easy thing do to, although I can't seem to get it right.I've also searched around a bit and can't seem to find an answer.

I'm trying to remove the root directory from $url string.

Here's my code:

<?php

    $files =  glob( $_SERVER['DOCUMENT_ROOT'] . '/files/*');

    $root = $_SERVER['DOCUMENT_ROOT'] . '/files/';

    foreach($files as $file)
    {
       $name = preg_replace("$root", "", $file);
       echo "$name";
    }

?>

Answer 1

Use str_replace() instead, like this:

$name = str_replace("$root", "", $file);

Also, the double quotes aren't necessary. You could do like this to save (minor) execution time:

$name = str_replace($root, '', $file);

(PHP will parse text in double quotes to look for variables. In this case you can clarify directly that there IS a variable in there and nothing else. The text that it should be replaced with is empty (no need for parsing there).

Answer 2

看一下基名 ：

$name = basename($file);