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9 years ago
<?php

// shortens a long string to a max length while inserting a string into the exact middle
function strShorten($str, $maxlen = 10, $insert = '/.../') {
  if ($str && !is_array($str)) { // valid string
    if ($maxlen && is_numeric($maxlen) && $maxlen < strlen($str)) { // string needs shortening
      if ($insert && ($ilen = strlen($insert))) { // insert string and length
        if ($ilen >= $maxlen) { // insert string too long so use default insert
          $insert = '**'; // short default so works even when a very small $maxlen
          $ilen = 2;
        }
      }
      $chars = $maxlen - $ilen; // number of $str chars to keep
      $start = ceil($chars/2); // position to start cutting
      $end = floor($chars/2); // position from end to stop cutting
      return substr_replace($str, $insert, $start, -$end); // first.insert.last
    } else { // string already short enough
      return $str; // return original string
    }
  }
}

echo strShorten('123456789', 6, ''); // outputs 123789
echo strShorten('123456789', 6, '-'); // outputs 123-89
echo strShorten('123456789', 6, 'longstring'); // outputs 12**89
echo strShorten('abcdefghijklmnopqrstuvwxyz', 10, '..'); // outputs abcd..wxyz
echo strShorten('abcdefghijklmnopqrstuvwxyz'); // outputs abc/.../yz

?>
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