String to Leet (1337) Speak in PHP

Question

Does anyone know where I can find a good starting point to code a function that would take a string and convert it to leet speak?

function stringToLeetSpeak($string) {
  // Logic

  return $leetString;
}

Answer 1

You can use strtr to translate certain characters:

$output = strtr($str, 'let', '137');

Or use str_replace with arrays:

$output = str_replace(array('l','e','t'), array('1','3','7'), $str);

With this you can also replace strings and not just single characters:

$output = str_replace(array('hacker'), array('hax0r'), $str);