Checkboxes and arrays!!!

**k4is3r** · May 14, 2003 06:46

Hi all,
i've some problem with a script that should read the content of a folder and print the content in a table, and near each files name , i display a checkboxes that if checked and pressed the button delete it will delete from the server the file.
Now this is the file taht read and print the result:

PHP Code:


<?php

function listFiles($dir,$type) { 

    if (strlen($type) == 0) $type = "all"; 

    $x = 0; 

    if(is_dir($dir)) { 

        $thisdir = dir($dir); 

        while($entry=$thisdir->read()) { 

            if(($entry!='.')&&($entry!='..')) { 

                if ($type == "all") { 

                    $result[$x] = $entry; 

                    $x++; 

                    next; 

                } 

                $isFile = is_file("$dir$entry"); 

                $isDir = is_dir("$dir$entry"); 

                if (($type == "files") && ($isFile)) { 

                    $result[$x] = $entry; 

                    $x++; 

                    next; 

                } 

                if (($type == "dir") && ($isDir)) { 

                    $result[$x] = $entry; 

                    $x++; 

                    next; 

                } 

                $temp = explode(".", $entry); 

                if (($type == "noext") && (strlen($temp[count($temp) - 1]) == 0)) { 

                    $result[$x] = $entry; 

                    $x++; 

                    next; 

                } 

                if (($isFile) && (strtolower($type) == strtolower($temp[count($temp) - 1]))) { 

                    $result[$x] = $entry; 

                    $x++; 

                    next; 

                } 

            } 

        } 

    } 

    return $result; 

} 

/* directory e estensione files */

$files = listFiles("./","jpg"); 

?>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>Download</title>

<style type="text/css">

td { 

    font- family:Verdana,Geneva,Arial,Helvetica,sa

ns-serif;

    font-size:11px

}

</style>

</head>

<body bgcolor="#ffffff" link="#ff8000" vlink="#00659C" alink="#00659C">

<form action="cancella.php" method=\"POST\">

<table cellpadding='1' cellspacing='0' border='0' bgcolor='black' width='552' align='center'>

 <tr>

  <td><br>  

<?php

if (isset($files)) { 

    echo "<font color=white>Numero di file(s): <b>".count($files)."</b></font><br><br>";  

    $cols = 2;

    $width = round(100 / $cols);

    $ret = "<table border=0 cellspacing=2 width=\"100%\" bgcolor=white><tr><td valign=top width=\"$width%\">";

    $numtot = count($files);

    $numto = 1.0 / $cols;

    $step = 1.0 / $numtot;

    $numfile = 0.0;

    foreach ($files as $value) { 

        $numfile += $step;

        $ret .= "<input type=\"checkbox\" name=\"del[]\" id=\"$value\">  $value  <a href=\"http://mysite.com/upload/$value\" target=\"_new\">Guarda</a><br>";// <== modifica

        if (($numfile+0.0000001)>=$numto) {

                $ret.= "</td><td valign=\"top\" width=\"$width%\">";

                $numfile -= $numto;

        }

    }

    $ret = ereg_replace("</td><td valign=\"top\" width=\"$width%\">$","",$ret);

    $ret .= "</td></tr></table>$files";

    echo $ret;

}

?>

  </td>

 </tr>

</table><br>

<center><INPUT type="SUBMIT"  value="Cancella"></center>

</form>

</body>

</html>

And this is the file cancella.php:

PHP Code:


foreach($_POST['del'] as $path => $key) 

   if($key) unlink($path);

But when i go to press the button "Cancella", it returns to me:

Warning: Invalid argument supplied for foreach()
I've read that this is beacuse the array $POST is NULl, bot after all, how can i solve this problem?!?!

byez all

**PHP John** · May 14, 2003 07:04

It might be confused because of the escaped quotes here: method=\"POST\"

Try removing the \'s.

**k4is3r** · May 14, 2003 07:22

OK , now it works!!!!

But when the script call the function unlink(); it print out:
Warning: unlink() failed (No such file or directory)

Because i don't konw how to re-call the variable $value that is the name of the file.How can i get this variable from the array $_POST ???

thank you and bye

**PHP John** · May 14, 2003 07:42

The $_POST['del'] is not an associative array. You would go about deleting the files this way:

PHP Code:


foreach( $_POST['del'] as $fileToDelete)
  unlink( $fileToDelete );

**k4is3r** · May 14, 2003 07:49

I've modified the file to this:

PHP Code:


foreach($_POST['del'] as $file) 

   unlink($file); 

    var_dump($file);

And it return to me:

Warning: unlink() failed (No such file or directory) in /home/mysite/www/upload/cancella.php on line 4
string(2) "on"

It seems that there isn't the variable $value in the array $_POST

How to solve it?

thanks again

**PHP John** · May 14, 2003 08:12

Do this instead, for now:

PHP Code:


foreach( $_POST['del'] as $file )
  echo $file.'<br />';

**k4is3r** · May 14, 2003 08:22

I've checked 4 box and it returns:

on
on
on
on

And now??
thanks in advice

**PHP John** · May 14, 2003 08:33

You need to set the values in your checkboxes, like this:

<input type='checkbox' name='del[]' value='$value' id='$value' />$value

**k4is3r** · May 14, 2003 08:36

Originally Posted by PHP John

You need to set the values in your checkboxes, like this:

<input type='checkbox' name='del[]' value='$value' id='$value' />$value

I'm stupid men ihihihi

Thank you very much John, they are my first posts in this community and y're now my guru

Thank you !!!!!

**PHP John** · May 14, 2003 09:00

You are most welcome.

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