Any php string function to do something like this?

Question

$length = strlen($s);

if($length == 10)
{

  $newval = '';
  for($i = 0; $i < 10; $i++)
  {

    $newval .= $s[$i];

    if($i == 2 || $i == 5)  
    {
       $newval .= '-';
    }

  }

}

If anybody knows what kind of a string function I would use, please let me know.

Answer 1

A simple string operation should be kept simple, so go with the most straight forward solution:

$str = substr($input, 0, 3).'-'.substr($input, 3, 3).'-'.substr($input, 6);

But as usually, there are several ways to skin a cat, so you have options. Like:

$str = sprintf('%s-%s-%s', substr($input, 0, 3), substr($input, 3, 3), substr($input, 6));

Or alternatively

$str = preg_replace('/^(.{3})(.{3})(.*)$/', '\1-\2-\3', $input);

Or alternatively

$str = preg_split('//', $input);

if (5 > count($chrs)) {
   array_splice($chrs, 4, 0, '-');
}

if (3 > count($chrs)) {
   array_splice($chrs, 2, 0, '-');
}

$str = implode('', $chrs);

Answer 2

Sure, you can use substr to accomplish this:

if(strlen($s) == 10) {
   $s = substr($s, 0, 3) . '-' . substr($s, 3, 3) . '-' . substr($s, 6);
}

codepad example

Answer 3

substr ?

if(strlen($s) == 10)
{
   $newval.=substr($s,0,3)."-".substr($s,3,3)."-".substr($s,6,4);
}