unlink（）函数不会删除文件
[英]unlink() function wont't delete a file
问题描述
This thread was discussed many times but it didn't fix my error... When I try to use unlink($path) function it just gives me an error, however I have permissions to delete it, the file and the path is correct, I just don't seem to find an error. 
这个线程被讨论了很多次，但是并没有解决我的错误...当我尝试使用unlink（$ path）函数时，它只是给我一个错误，但是我有权删除它，该文件和路径是正确的，我似乎没有找到错误。
Here is my code (deleteuser.php): 这是我的代码（deleteuser.php）：
<?php
$path = "/thnk.php";
if (!unlink($path)) {
echo "Error!";
} else {
header("Location: index.php?deletesucces!");
}
?>
And HTML: 和HTML：
<html>
<body>
<form action="/step/deleteuser.php" method="POST">
<button name="submit" type="submit">Delete tha user</button>
</form>
</html>
</body>
PS I am very new to PHP, try to explain it as much understandable for newbies as possible! PS我对PHP非常陌生，请尝试向新手尽可能多地解释它！ Thanks! 谢谢！
2 个解决方案
解决方案1
0 2017-11-03 13:25:28
first check the file available in folder or not 首先检查file available in folder or not是否有file available in folder or not
<?php
$filename = 'you file path';
if (file_exists($filename)) {
echo "The file $filename exists";
unlink($filename);
header("Location: index.php?deletesucces!");
} else {
echo "The file $filename does not exist";
}
?>
解决方案2
-1 已采纳 2017-11-03 13:18:48
You have given an absolute path and I highly doubt you put the file in /thnk.php , rather than your document root. 您已经给出了绝对路径，我非常怀疑您将文件放在/thnk.php ，而不是文档根目录中。
Example 例
Your webserver's document root and your php files are here: 您的网络服务器的文档根目录和php文件位于此处：
/var/www/public_html/
When you write unlink('/thnk.php'); 当你写unlink('/thnk.php'); it will look here: 它会在这里看起来：
/thnk.php
But you want it to delete the file from here: 但是您希望它从此处删除文件：
/var/www/public_html/thnk.php
That's a different "root". 那是一个不同的“根”。 So you have to write 所以你必须写
unlink($_SERVER['DOCUMENT_ROOT'] . '/thnk.php');
Or use a relative path like 或者使用类似的相对路径
unlink('../thnk.php'); // which can be unsafe in some situations
If you don't know an error but something does not work, it is always helpful to simply enable error reporting: 如果您不知道错误，但是某些操作不起作用，则仅启用错误报告总是有帮助的：
<?php
error_reporting(E_ALL);
ini_set('display_errors', true);
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