adding space after 3 spaces from the end

[ahmed24]

I am trying to put a space in a string after 3 characters from the end. So if I use the word HELLO, i need the space to show after the E so reading HE LLO.

Thanks

[coopster]

What if the string is not 3 characters long? :)

<pre> 
<?php 
$strings = array('HELLO', 'One', '1', ''); 
foreach ($strings as $string) { 
  if (strlen($string) > 3 && $lastThree = substr($string, -3)) { 
    $string = substr_replace($string, " {$lastThree}", -3); 
  } 
  var_dump($string); 
} 
?> 
</pre>