Need Help with Php array problem

PHP
4

@davidtsadler

Updated Link

Edit:
I have tried to understand your function but it seems far too complicated for my liking :frowning:

function highlight(
  string $text, 
  array  $words, 
  array  $colors, 
  bool   $ignoreCase = false, 
  string $format     = '<b style="color:%s">%s</b>'
):string
{
    $wordToColor = [];
    $colorIdx = 0;

    $re = '~\\b('.implode('|', $words).')\\b~';
    if ($ignoreCase) {
        $re .= 'i';
    }

    return preg_replace_callback
    (
      $re, 
      function ($m) use 
      (
        $colors, $format, &$wordToColor, &$colorIdx
      ):string
      {
        $word = $m[0];

        if ( ! isset($wordToColor[$word]) ) {
            $wordToColor[$word] = $colors[$colorIdx];
        }
        $colorIdx = $colorIdx < count($colors) - 1 ? $colorIdx + 1 : 0;

        $color = $wordToColor[$word];

        return sprintf($format, $color, $word);
      },
      $text
    );
}