problem in coding

[AsHantoosH]

we have an array of 100 elements. Each element contains some text. We want to:
append a star character to the end of every fifth element
remove every second character from every tenth element, and…
add a line feed (ascii 10) after the 30th character of every array element whose length is greater than 30 characters.

[AsHantoosH]

we have an array of 100 elements. Each element contains some text. We want to:
append a star character to the end of every fifth element

[hoopy]

I guess if you have 100 fixed elements you could just manually assign like:

$array[5] .= "*"; $array[10] .= "*";

Assuming your array index starts with 1 otherwise use 4, 9, etc.

Although assuming you have an array called $arr filled with data with the index of 1-100 then maybe something like this:

$x= 1;
for($i=1;$i<101;$i++)
{
  if($x== 5) { 
    $arr[$i] .= "*"; // append a *
    $x= 1; // reset counter
  } else 
    $x++; // else increase counter
}

Its a bit dirty but just appends a * to every 5th element.