Topic: [SOLVED] unlink with wildcard?

[acctman]

can unlink be used with a wildcard to delete a file? ie. unlink ("/200_*.jpg"); The files i'm deleting will always start and end with 200_ and .jpg

[.josh]

I don't think so, but you can first use glob() to grab the file names using wildcards and then loop through the array returned from it.

[MadTechie]

no, but it shouldn't be too hard should

**totally untested**

Code: [Select]

<?php
function RecursiveUnlink($dir,$regEx='200_')
{
    if(!$dh = @opendir($dir))
    {
        return;
    }
    while (false !== ($obj = readdir($dh)))
    {
        if($obj == '.' || $obj == '..')
        {
            continue;
        }elseif(preg_match('/^'.$regEx.'*?\.jpg$/i', $obj))
        {
            unlink($obj);
        }
    }

    closedir($dh);
return;   
} 
?>

[ToonMariner]

try this...

Code: [Select]

<?php
$files = glob('/200_*.jpg');
array_walk($files,'unlink');
?>


[thebadbad]

try this...

Code: [Select]

<?php
$files = glob('/200_*.jpg');
array_walk($files,'unlink');
?>


I'm pretty sure you would use array_map() instead, as array_walk() only takes user-defined functions.

[MadTechie]

as array_walk() only takes user-defined functions.

Where did you read that ?

ToonMariner function looks sound to me (not a Glob fan.. but I am starting to be  )

[.josh]

you're both wrong.  You can call it with array_walk, but you'll get a big fat "blah expects a parameter to be passed" error

[thebadbad]

Okay then. Was just my guess since it said

Applies the user-defined function funcname to each element of the array array.

in the manual.

[acctman]

i received this error with array_walk Warning: Wrong parameter count for unlink() in /glob1.php on line 3


<?php
$files = glob('200_*.jpg');
array_walk($files,'unlink');
?>


and with the glob('/200_*.jpg'); nothing happens no error and no file delete

[thebadbad]

You didn't see our posts? Here ya go:

<?php
$files = glob('200_*.jpg');
array_map('unlink', $files);
?>
@Crayon Violent
I'm just curious; how would you make array_walk() unlink the files without writing your own function to feed to array_walk()?

[MadTechie]

Okay then. Was just my guess since it said

Applies the user-defined function funcname to each element of the array array.

in the manual.

Yes the function the user defined!, being the second parameter!

of course this "should" work!

Code: [Select]

<?php
$files = glob('200_*.jpg');
array_walk($files,'myunlink');

function myunlink($t)
{
unlink($t);
}
?>


[ToonMariner]

hmm - learn something new - honestly never used array_map - and when I have used array_walk its been with my own defined function.

still my 'methodology' was there

[thebadbad]

Yes the function the user defined!, being the second parameter!

of course this "should" work!

Code: [Select]

<?php
$files = glob('200_*.jpg');
array_walk($files,'myunlink');

function myunlink($t)
{
unlink($t);
}
?>


Yeah okay, I just didn't read it like that. And no, your example won't work, array_walk() sends two parameters to the "user-defined" function - the array value as the first and the array key as the second. So the defined function should take two parameters.

[.josh]

@Crayon Violent
I'm just curious; how would you make array_walk() unlink the files without writing your own function to feed to array_walk()?

You can't.  I was saying MT was wrong because array_walk() won't get the job done.  I was saying you were wrong in that array_walk will indeed call a predefined function, but since you can't pass anything to unlink with it, it throws the warning.

[thebadbad]

Great, just realized that too.

[MadTechie]

Just tested my code.. worked fine on WinXP (not saying much I know) no errors

[acctman]

thanks

[thebadbad]

Just tested my code.. worked fine on WinXP (not saying much I know) no errors

Made me test it too, and yeah, it works when you wrap unlink in a user function. Weird though, can't explain why it's okay with that, but fails with the built-in function.

Edit: Actually, I think I got it: unlink() takes a stream resource as an optional second parameter. When array_walk() sends the array key as the second parameter, unlink() fails, because it expects a stream resource, but gets an integer or string. When your function myunlink() receives the second parameter, it simply ignores it (=not resulting in a fatal error).

[tastro]

this works just fine for me on xp:

$dir = "/yourdirectory/";
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false){
if(
preg_match("/yourregex./ismU", $file))){echo "filename:".$file."\n";unlink($file);}
}
closedir($dh);
}
}