PHP的scandir函数问题

Question

dirdel.php:

<?php
//The name of the folder.
$dir = 'images';
//Get a list of all of the file names in the folder.
$arraydir = scandir($dir, 2);
print_r($arraydir);

//Loop through the file list.
foreach ($arraydir as $key => $value) { 
unlink($arraydir[2]); 
}  
?>

Array outputs:

Array ( [0] => . 
        [1] => .. 
        [2] => ana.png 
        [3] => ban.png 
        [4] => ing.png 
        [5] => maca.png 
        [6] => no.png 
        [7] => pret.png )

Warning: unlink(ana.png): No such file or directory in C:\\phpdesktop- chrome-57.0-rc-php-7.1.3\\www\\dirdel.php on line 10

To investigate the error, I also tried something like:

require 'images/';

Output:

Warning: require(C:\\phpdesktop-chrome-57.0-rc-php-7.1.3\\www\\images): failed to open stream: Permission denied in C:\\phpdesktop-chrome-57.0-rc- php-7.1.3\\www\\dirdel.php on line 2

I want to delete the file "ana.png" represented by: "$arraydir[2]" (the file is found in www/images)

I already searched in several places, but I did not find anything, that help me to fix this problem.

Is there any solution for this?

Alternatives are valid, as long as they respect the structure of the arrays:

Array ( [0] => . 
        [1] => .. 
        [2] => ana.png 
        [3] => ban.png 
        [4] => ing.png 
        [5] => maca.png 
        [6] => no.png 
        [7] => pret.png )

Thanks for your attention.

Answer 1

The file is in the images folder but you do not add that to the unlink() function parameter.

So try this instead

unlink($dir . '/' . $arraydir[2]);

Answer 2

Actually if you run your code you'll always unlink only index 2 of your array. You have to make use of the variables and references that you are using in your foreach loop. I suggest you try the below mentioned code:

<?php
    //The name of the folder.
    $dir = 'images';

    //Get a list of all of the file names in the folder.
    $arraydir = scandir($dir, 2);
    print_r($arraydir);

    //Loop through the file list.
    foreach ($arraydir as $key => $value) {
        if ($arraydir[$key] == 'ana.png' && file_exists($dir . DIRECTORY_SEPARATOR . $arraydir[$key])) {
            unlink($dir . DIRECTORY_SEPARATOR . $arraydir[$key]);
            break;
        } 
    }  
?>

Hope this helps.

Answer 3

When you first tried to delete the file ana.png, the path used was relative to your current directory, so the file was not found. What resulted in the first error.

To solve that, you should either give an absolute path name ,

$prefix = 'C:\\phpdesktop-chrome-57.0-rc-php-7.1.3\\www\images\\';
$filename = $prefix . $arraydir[2];
unlink($filename)

or, concatenate your file name with its directory name $dir . '/' . $arraydir[2] $dir . '/' . $arraydir[2]

$dir = 'images'; /*Assuming your current directory is 'C:\phpdesktop-chrome-57.0-rc-php-7.1.3\www\'*/
unlink($dir . $arraydir[2]);

As for the second error, it seems that you don't have write permissions on the folder 'C:\\phpdesktop-chrome-57.0-rc-php-7.1.3\\www\\images'; you should change the files and directory permissions. I would suggest following this tutorial about setting about file permissions on windows 10