How to fix Undefined offset: error?

[Kevon]

Hello,

I'm designing a photo gallery for my website, I've followed several tutorials online about how to go about doing this, with great success, I have come up with a set of codes, however I keep getting several error messages when I run my code. Furthermore I'm a beginner at PHP programming so please bare with me.

the error message I get is as follows:

Notice: Undefined offset: 2 in C:\wamp\www\LuxuRay\album.php on line 213

Notice: Undefined offset: 2 in C:\wamp\www\LuxuRay\album.php on line 223

I've gone through my code a million time but cannont find whats wrong with it. So if somebody can take a look at my code and tell me whats wrong I would my much obliged.

My code is as follows:

 
  for( $i=$start; $i<$start + $itemsPerPage; $i++ ) {
 
          if(is_file( $src_folder .'/'. $files[$i] ) ) { 
 
            echo '<div class="thumb">
                    <a href="'. $src_folder .'/'. $files[$i] .'" class="albumpix" rel="albumpix">
                      <img src="'. $src_folder .'/thumbs/t_'. $files[$i] .'" width="'.$thumb_width.'" height="'.$thumb_height.'" alt="" />
                    </a>  
                  </div>'; 
 
          } else {
 
            echo $files[$i];
 
          }
 
    }
 
 

Thats the section of my code that is giving the error. Any help will be much appreciated. I look forward to hearing from somebody :-D

By the way Line 2 = Line 213 and Line 14 = Line 223

Thanks

[Dormilich]

your $files array has less elements than you expect it to have. make sure that $start + $itemsPerPage is not larger than count($files).

[Kevon]

Thanks for your reply, I was afraid I would have to wait for days.

How would I check if my $start + $itemsPerPage is not larger than count ($files)?

Thanks

Kev

[Dormilich]

How would I check if my $start + $itemsPerPage is not larger than count ($files)?

exactly like that (only in code).

[Kevon]

now I'm getting another error Notice: Undefined index: in C:\wamp\www\LuxuRay\album.php on line 85

but everything is defined

foreach($folders as $album) {
 
        if(!in_array($album, $ignore)) {    
 
           array_push( $albums, $album );
 
           $caption = substr($album,0,20);
           array_push( $captions, $caption );
 
           $rand_dirs = glob($mainFolder.'/'.$album.'/thumbs/*.*', GLOB_NOSORT);
         $rand_pic = $rand_dirs[array_rand($rand_dirs)];
           array_push( $random_pics, $rand_pic );
 
         }
 
     }