array not working

[code333]

Below is an array and its elements can be accessed using a

foreach loop but when I want to access its elements

with normal for loop it does not work? any ideas?

 

 

$bucket_contents = $s3->getBucket("gmt.dvd.052110"); 

 

foreach ($bucket_contents as $file){ 

     

      $fname = $file['name'];

      $furl = "http://s3.amazonaws.com/gmt.dvd.052110/".$fname; 

   

      //output a link to the file 

      echo "<a href=\"$furl\">$fname</a><br />"; 

  }

 

//ABOVE WORKS FINE

 

//BELOW HAS NO OUTPUT:

 

$bucket_contents = $s3->getBucket("gmt.dvd.052110"); 

 

  for ($i = 0; $i < sizeof($bucket_contents); $i++){

 

  echo $bucket_contents[$i];

 

 

  }

 

 

If $bucket_contents is an array why can't I just do

an old fashion for loop?

 

Thanks for the help.

 

 

[kenrbnsn]

Because the array you're trying to access does not have numerical indices.

 

Do a

<?php
echo '<pre>' . print_r($bucket_contents,true) . '</pre>';
?>

and you'll see this.

 

Ken

[code333]

I see but then should this not work:

echo $bucket_contents['name']; 

I don't get anything..

[kenrbnsn]

Please post the output of the print_r function I gave you.

 

Ken

[code333]

Array

(

    [CagedDVD.flv] => Array

        (

            [name] => CagedDVD.flv

            [time] => 1275422377

            => 400148528

            [hash] => d850618ffe31f68e4bad4353ee71ed0b

        )

 

    [CagedDVD.mov.red.zip] => Array

        (

            [name] => CagedDVD.mov.red.zip

            [time] => 1275086872

            => 602661608

            [hash] => 73355b6de20ec1437f5e5f15b23e21c7

        )

 

    [CagedDVD.mov.zip] => Array

        (

            [name] => CagedDVD.mov.zip

            [time] => 1275070295

            => 602661608

            [hash] => 73355b6de20ec1437f5e5f15b23e21c7

        )

 

    [ModesDVD.mov.red.zip] => Array

        (

            [name] => ModesDVD.mov.red.zip

            [time] => 1275086624

            => 706116261

            [hash] => 8f4fe233e9a21c423c3477df1211cdab

        )

 

    [ModesDVD.mov.zip] => Array

        (

            [name] => ModesDVD.mov.zip

            [time] => 1274843456

            => 1426863264

            [hash] => 4c4f05ac40e869ec80e126e74d7fb87b

        )

 

    [PentatonicDVD.mov.red.zip] => Array

        (

            [name] => PentatonicDVD.mov.red.zip

            [time] => 1275095016

            => 618509462

            [hash] => 061af76d99402ec7beabba50cade8060

        )

 

    [PentatonicDVD.mov.zip] => Array

        (

            [name] => PentatonicDVD.mov.zip

            [time] => 1274474503

            => 939287499

            [hash] => 80aaebf2deb719d8a107d2df3032faf2

        )

 

    [ProgressionsDVD.flv] => Array

        (

            [name] => ProgressionsDVD.flv

            [time] => 1275423397

            => 1218201159

            [hash] => c1aa5e751bbcf2928b1b4ee10d6e1b9c

        )

 

    [ProgressionsDVD.mov.red.zip] => Array

        (

            [name] => ProgressionsDVD.mov.red.zip

            [time] => 1275108754

            => 771554647

            [hash] => 976747b563808f196c40a6e9df2cdc82

        )

 

    [ProgressionsDVD.mov.zip] => Array

        (

            [name] => ProgressionsDVD.mov.zip

            [time] => 1274841400

            => 1580149160

            [hash] => c3a377580848ca9edb40e10a83dd5e81

        )

 

)

 

[codebyren]

As kenrbnsn said, it comes down to the indices:

 

echo $bucket_contents['name']; 

...will be invalid while

 

echo $bucket_contents['CagedDVD.flv']['name']; 
// or
echo $bucket_contents['CagedDVD.mov.red.zip']['name']; 
// etc.

... should work fine.

 

There is that extra level to the array that you are missing.  This should also show why $bucket_contents[$i] doesn't work: $i in your example is an incrementing number and there are no numeric indices in the array.

 

Hope this helps.

[code333]

I see. it is because it is a multi-dimensional array. This sheds light to my confusion. so when this is expressed:

 

foreach ($bucket_contents as $file)

 

$bucket_contents is accessing its own sub group of  arrays, correct?

[codebyren]

Yes, when you say:

 

foreach ($bucket_contents as $file)

... you are effectively returning each top-level array in $bucket_contents (as $file). So the foreach loop basically does:

 

$file = $bucket_contents['CagedDVD.flv']; // this is an array containing 'name', 'time', size' and 'hash'
$file = $bucket_contents['CagedDVD.mov.red.zip'];
$file = $bucket_contents['CagedDVD.mov.zip'];
// ...
// ..
// etc.

Except you obviously get to do something with the current state of $file during the foreach loop before it is re-assigned the next array in $bucket_contents.

 

Hope this clears it up...

[code333]

I see so it is literally a pointer to the top level array with access to its sub arrays. very interesting.. Thanks a bunch I learned something new today about programming. Thanks again!!