arrays - Undefinied offset php -

i trying run code:

$file = fopen($txtfile, "r");         while(!feof($file)) {             $line = fgets($file);             $pieces = explode(",", $line);          $date = $pieces[0];     $open = $pieces[1];     $high = $pieces[2];     $low = $pieces[3];     $close = $pieces[4];     $volume = $pieces[5]; 

}

and notice:

undefined offset: 1 in ...
undefined offset: 2 in ...
undefined offset: 3 in ...
undefined offset: 4 in ...
undefined offset: 5 in ...

i thankful, if tell me, why so.

as stephen said looks array not expecting be, there few things can do.

try using

var_dump($pieces) 

and take @ array contains. thing can prevent errors , more defensive in code following:

$file = fopen($txtfile, "r");     while(!feof($file)) {         $line = fgets($file);         $pieces = explode(",", $line);      if(isset($pieces[0]))     $date = $pieces[0]; if(isset($pieces[1]))     $open = $pieces[1]; if(isset($pieces[2]))     $high = $pieces[2]; if(isset($pieces[3]))     $low = $pieces[3]; if(isset($pieces[4]))     $close = $pieces[4]; if(isset($pieces[5]))     $volume = $pieces[5]; } } 

alternatively in case can check length of $pieces, use may better , shorter, this:

$file = fopen($txtfile, "r");     while(!feof($file)) {         $line = fgets($file);         $pieces = explode(",", $line);      if(sizeof($pieces) != 6){   //handle case here } else {     $date = $pieces[0];     $open = $pieces[1];     $high = $pieces[2];     $low = $pieces[3];     $close = $pieces[4];     $volume = $pieces[5]; } } 

this ensures variables exist before try them , avoid issue of undefined index.