Uninitialized string offset

[louis_coetzee]

function encrypt($value)
{
  $result = '';
  for ($i = 1; $i <= strlen($value); $i++){
  $val2 = $result;
[color=red]line 315[/color]  switch (ord($value[$i])){
    case 0 : $result = $val2.'[NULL]'; break

I get: Notice: Uninitialized string offset: 5 in C:\wamp\www\aacomplienz\f\functions.php on line 315

 

[MadTechie]

Arrays start from 0 so your attempting to get one extra charactor from $value

change

strlen($value)

to

(strlen($value)-1)

[JonnoTheDev]

Because you are treating a string as an array ($value)

 

if $value is a string i.e

$value = "foobar";

I cannot use the following

$value[1]

[MadTechie]

if $value is a string i.e

$value = "foobar";

I cannot use the following

$value[1]

 

Of course you can, it will get the x charactor

[JonnoTheDev]

Of course you can, it will get the x charactor

Ah yes didn't realize as never used a string in that fashion. Unsure whether that is bad practice as it is a way of accessing array values from a key.

 

If it was my code I would have split the string

$value = str_split("foobar");
$letter = $value[$i];

 

Something new every day, eh

[MadTechie]

You could also do this

$value = "foobar";

$value{3}; // returns b

 

But PHP6 decided on a standard so $value{3} will not work on PHP6 but $value[3] will be fine

[JonnoTheDev]

Interesting