Scan directory with PHP and use results in JavaScript

Question

I scan a directory with PHP which includes only folders:

$folders = scandir('gallery');

Now i want to check if a string in javascript a folder in this directory.

if(theString == allTheFolders){
     alert('yay');
}

Now $folders is an array with strings in it. To get all the strings i use a foreach loop and ignore the '.' & '..' directory's. But how can i get all these folders in the if loop? Hope you understand my question!

you can't compare a string with a PHP-Array! you can only compare the string with one folder! — user1714425
– user1714425, Commented Dec 6, 2012 at 15:57
@Karen: Uhm, yes i know. so this is my Question! 'allTheFolders' stays for compare the string with all found folders... — Michael Schmidt
– Michael Schmidt, Commented Dec 6, 2012 at 15:58
JS is visible to the client, so I don't know if security means a great del to you, but displaying your complete folder structure to possible attackers doesn't seem like a good idea to me... — 11684
– 11684, Commented Dec 6, 2012 at 15:59
@11684: gallery's folder structure might not be security-essential ;) — Ry-
– Ry- ♦, Commented Dec 6, 2012 at 16:01
@11684: I create with uploads new folders. So i don't want for every new album edit my javascript. So i want to scan only the gallery folder to get all albums :) — Michael Schmidt
– Michael Schmidt, Commented Dec 6, 2012 at 16:03

Brad · Accepted Answer · 2012-12-06 16:20:49Z

4

Echo out your array as JSON, right into your JavaScript.

echo 'var folders = ', json_encode($folders);

Then you can loop through or do whatever you need directly in JavaScript.

Edit: Now that you have posted your actual question... Do this in your JavaScript:

var wantedFolder = 'something';
var wantedFolderFound = false;
for (folderIndex in folders) {
    if (folders[folderIndex] === wantedFolder) {
        wantedFolderFound = true;
    }
}
if (wantedFolderFound) {
    alert('Folder found!');
} else {
    alert('Folder not found.');
}

As an alternative, I would probably use Array.indexOf(). It isn't available in all browsers, but that problem is easily remedied. See the documentation: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/indexOf

edited Dec 6, 2012 at 16:20

answered Dec 6, 2012 at 15:57

Brad

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5 Comments

11684 Over a year ago

Brilliant, I had the json_encode, but didn't know how to get it to the JS! +1

Michael Schmidt Over a year ago

Okay. I think, var folders is now a array... Uhm. how can i now insert all the folders in my if loop? :S

Brad Over a year ago

@dTDesign, Your question makes no sense. Are you trying to loop through all folders? developer.mozilla.org/en-US/docs/JavaScript/Reference/…

Michael Schmidt Over a year ago

When i see it correct, i get now a array of all folders. Now my target is to check, if my string is a album. So i must compare it with all the results in the folders-array. But i don't know how i should do that...

Michael Schmidt Over a year ago

Oh ok, i think it isn't a array. I try it with google... +1 for your help, thank you

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