所以我正在尝试制作一个简单的脚本，它将有一个预定义文件的列表，搜索列表中没有的任何内容并将其删除。
我现在有这个
<?php
$directory = "/home/user/public_html";
$files = glob($directory . "*.*");
foreach($files as $file)
{
$sql = mysql_query("SELECT id FROM files WHERE FileName='$file'");
if(mysql_num_rows($sql) == 0)
unlink($directory . $file);
}
?>
但是，我想避免查询，以便我可以更频繁地运行脚本（大约有 60-70 个文件，我想每 20 秒左右运行一次？）那么我将如何将文件列表嵌入到 php 文件中并检查它而不是数据库？
谢谢！
您两次缺少尾随/。glob()你把/home/user/public_html*.*作为论据，我认为你的意思是/home/user/public_html/*.*.
这就是为什么我打赌没有什么与您表中的文件匹配。这也不会给出错误，因为语法很好。
然后你unlink()的地方再做一次......你的论点home/user/public_htmltestfile.html应该home/user/public_html/testfile.html。
我喜欢这种语法风格："{$directory}/{$file}"因为它简短且更具可读性。如果缺少 /，您会立即看到它。您也可以将其更改为 $directory . "/" . $file ，您喜欢它。一行条件语句也是如此。所以它来了..
<?php
$directory = "/home/user/public_html";
$files = glob("{$directory}/*.*");
foreach($files as $file)
{
$sql = mysql_query("SELECT id FROM files WHERE FileName='"{$file}'";");
if(mysql_num_rows($sql) == 0)
{
unlink("{$directory}/{$file}");
}
}
?>
编辑：您请求递归。来了..
你需要创建一个函数，你可以用路径作为参数运行一次。然后，您可以从该函数内部对子目录运行该函数。喜欢这个：
<?php
/*
ListDir list files under directories recursively
Arguments:
$dir = directory to be scanned
$recursive = in how many levels of recursion do you want to search? (0 for none), default: -1 (for "unlimited")
*/
function ListDir($dir, $recursive=-1)
{
// if recursive == -1 do "unlimited" but that's no good on a live server! so let's say 999 is enough..
$recursive = ($recursive == -1 ? 999 : $recursive);
// array to hold return value
$retval = array();
// remove trailing / if it is there and then add it, to make sure there is always just 1 /
$dir = rtrim($dir,"/") . "/*";
// read the directory contents and process each node
foreach(glob($dir) as $node)
{
// skip hidden files
if(substr($node,-1) == ".") continue;
// if $node is a dir and recursive is greater than 0 (meaning not at the last level or disabled)
if(is_dir($node) && $recursive > 0)
{
// substract 1 of recursive for ever recursion.
$recursive--;
// run this same function again on itself, merging the return values with the return array
$retval = array_merge($retval, ListDir($node, $recursive));
}
// if $node is a file, we add it to the array that will be returned from this function
elseif(is_file($node))
{
$retval[] = $node;
// NOTE: if you want you can do some action here in your case you can unlink($node) if it matches your requirements..
}
}
return $retval;
}
// Output the result
echo "<pre>";
print_r(ListDir("/path/to/dir/",1));
echo "</pre>";
?>
如果列表不是动态的，请将其存储在数组中：
$myFiles = array (
'some.ext',
'next.ext',
'more.ext'
);
$directory = "/home/user/public_html/";
$files = glob($directory . "*.*");
foreach($files as $file)
{
if (!in_array($file, $myFiles)) {
unlink($directory . $file);
}
}